X-Git-Url: https://git.auder.net/css/rpsls.css?a=blobdiff_plain;f=client%2Fsrc%2Fviews%2FHall.vue;h=f4fc172cd4ffdfadc8cd74fea58721ea8f9d2656;hb=bf7e5f3669a4c0bfa2756921d15d3fd055d4cfd2;hp=190717d0dbe2df25c4529f597aba68565102163c;hpb=6808d7a16ec1e761c6a2dffec2281c96953e4d89;p=vchess.git

diff --git a/client/src/views/Hall.vue b/client/src/views/Hall.vue
index 190717d0..f4fc172c 100644
--- a/client/src/views/Hall.vue
+++ b/client/src/views/Hall.vue
@@ -1,55 +1,160 @@
 <template lang="pug">
 main
   input#modalInfo.modal(type="checkbox")
-  div#infoDiv(role="dialog" data-checkbox="modalInfo")
+  div#infoDiv(
+    role="dialog"
+    data-checkbox="modalInfo"
+  )
     .card.text-center
       label.modal-close(for="modalInfo")
       p(v-html="infoMessage")
-  input#modalNewgame.modal(type="checkbox")
-  div#newgameDiv(role="dialog" data-checkbox="modalNewgame")
+  input#modalAccept.modal(type="checkbox")
+  div#acceptDiv(role="dialog")
+    .card
+      p.text-center
+        span.variantName {{ curChallToAccept.vname }} 
+        span {{ curChallToAccept.cadence }} 
+        span {{ st.tr["with"] + " " + curChallToAccept.from.name }}
+      .diagram(
+        v-if="!!curChallToAccept.fen"
+        v-html="tchallDiag"
+      )
+      .button-group#buttonsTchall(:style="tchallButtonsMargin()")
+        button.acceptBtn(@click="decisionChallenge(true)")
+          span {{ st.tr["Accept challenge?"] }}
+        button.refuseBtn(@click="decisionChallenge(false)")
+          span {{ st.tr["Refuse"] }}
+  input#modalNewgame.modal(
+    type="checkbox"
+    @change="cadenceFocusIfOpened($event)"
+  )
+  div#newgameDiv(
+    role="dialog"
+    data-checkbox="modalNewgame"
+  )
     .card
       label#closeNewgame.modal-close(for="modalNewgame")
-      form(@submit.prevent="newChallenge()" @keyup.enter="newChallenge()")
+      div(@keyup.enter="issueNewChallenge()")
         fieldset
           label(for="selectVariant") {{ st.tr["Variant"] }} *
-          select#selectVariant(v-model="newchallenge.vid")
-            option(v-for="v in st.variants" :value="v.id"
-                :selected="newchallenge.vid==v.id")
+          select#selectVariant(
+            @change="loadNewchallVariant(trySetNewchallDiag)"
+            v-model="newchallenge.vid"
+          )
+            option(
+              v-for="v in st.variants"
+              :value="v.id"
+              :selected="newchallenge.vid==v.id"
+            )
               | {{ v.name }}
         fieldset
           label(for="cadence") {{ st.tr["Cadence"] }} *
           div#predefinedCadences
-            button 3+2
-            button 5+3
-            button 15+5
-          input#cadence(type="text" v-model="newchallenge.cadence"
-            placeholder="5+0, 1h+30s, 7d+1d ...")
+            button(type="button") 15+5
+            button(type="button") 45+30
+            button(type="button") 3d
+            button(type="button") 7d
+          input#cadence(
+            type="text"
+            v-model="newchallenge.cadence"
+            placeholder="5+0, 1h+30s, 5d ..."
+          )
+        fieldset
+          label(for="selectRandomLevel") {{ st.tr["Randomness"] }} *
+          select#selectRandomLevel(v-model="newchallenge.randomness")
+            option(value="0") {{ st.tr["Deterministic"] }}
+            option(value="1") {{ st.tr["Symmetric random"] }}
+            option(value="2") {{ st.tr["Asymmetric random"] }}
+        fieldset
+          label(for="memorizeChall") {{ st.tr["Memorize"] }}
+          input#memorizeChall(
+            type="checkbox"
+            v-model="newchallenge.memorize"
+          )
         fieldset(v-if="st.user.id > 0")
-          label(for="selectPlayers") {{ st.tr["Play with?"] }}
-          input#selectPlayers(type="text" v-model="newchallenge.to")
+          label(for="selectPlayers") {{ st.tr["Play with"] }}
+          select#selectPlayersInList(v-model="newchallenge.to")
+            option(value="")
+            option(
+              v-for="p in Object.values(people)"
+              :value="p.name"
+            )
+              | {{ p.name }}
+          input#selectPlayers(
+            type="text"
+            v-model="newchallenge.to"
+          )
         fieldset(v-if="st.user.id > 0 && newchallenge.to.length > 0")
-          label(for="inputFen") FEN
-          input#inputFen(type="text" v-model="newchallenge.fen")
-      button(@click="newChallenge()") {{ st.tr["Send challenge"] }}
-  input#modalPeople.modal(type="checkbox" @click="resetChatColor()")
-  div#peopleWrap(role="dialog" data-checkbox="modalPeople")
+          input#inputFen(
+            placeholder="FEN"
+            @input="trySetNewchallDiag()"
+            type="text"
+            v-model="newchallenge.fen"
+          )
+        .diagram(v-html="newchallenge.diag")
+      button(@click="issueNewChallenge()") {{ st.tr["Send challenge"] }}
+  input#modalPeople.modal(
+    type="checkbox"
+    @click="resetSocialColor()"
+  )
+  div#peopleWrap(
+    role="dialog"
+    data-checkbox="modalPeople"
+  )
     .card
       label.modal-close(for="modalPeople")
       #people
         #players
-          p(v-for="sid in Object.keys(people)" v-if="!!people[sid].name")
+          p(
+            v-for="sid in Object.keys(people)"
+            v-if="!!people[sid].name"
+          )
             span {{ people[sid].name }}
-            button.player-action(v-if="sid!=st.user.sid || isGamer(sid)" @click="challOrWatch(sid)")
-              | {{ getActionLabel(sid) }}
+            button.player-action(
+              v-if="isGamer(sid)"
+              @click="watchGame(sid)"
+            )
+              | {{ st.tr["Observe"] }}
+            button.player-action(
+              v-else-if="isFocusedOnHall(sid)"
+              @click="challenge(sid)"
+            )
+              | {{ st.tr["Challenge"] }}
           p.anonymous @nonymous ({{ anonymousCount }})
         #chat
-          Chat(:newChat="newChat" @mychat="processChat" :pastChats="[]")
+          Chat(
+            :newChat="newChat"
+            @mychat="processChat"
+            :pastChats="[]"
+          )
         .clearer
   .row
     .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
       .button-group
-        button#peopleBtn(onClick="doClick('modalPeople')") {{ st.tr["Social"] }}
-        button(onClick="doClick('modalNewgame')") {{ st.tr["New game"] }}
+        button#peopleBtn(onClick="window.doClick('modalPeople')")
+          | {{ st.tr["Who's there?"] }}
+        button(@click="showNewchallengeForm()")
+          | {{ st.tr["New game"] }}
+  .row(v-if="presetChalls.length > 0")
+    .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
+      h4.text-center {{ st.tr["Preset challenges"] }}
+      table
+        thead
+          tr
+            th {{ st.tr["Variant"] }}
+            th {{ st.tr["Cadence"] }}
+            th {{ st.tr["Random?"] }}
+            th
+        tbody
+          tr(
+            v-for="pc in presetChalls"
+            @click="newChallFromPreset(pc)"
+          )
+            td {{ pc.vname }}
+            td {{ pc.cadence }}
+            td(:class="getRandomnessClass(pc)")
+            td.remove-preset(@click="removePresetChall($event, pc)")
+              img(src="/images/icons/delete.svg")
   .row
     .col-sm-12.col-md-10.col-md-offset-1.col-lg-8.col-lg-offset-2
       div#div2
@@ -58,20 +163,34 @@ main
             | {{ st.tr["Live challenges"] }}
           button.tabbtn#btnCcorr(@click="setDisplay('c','corr',$event)")
             | {{ st.tr["Correspondance challenges"] }}
-        ChallengeList(v-show="cdisplay=='live'"
-          :challenges="filterChallenges('live')" @click-challenge="clickChallenge")
-        ChallengeList(v-show="cdisplay=='corr'"
-          :challenges="filterChallenges('corr')" @click-challenge="clickChallenge")
+        ChallengeList(
+          v-show="cdisplay=='live'"
+          :challenges="filterChallenges('live')"
+          @click-challenge="clickChallenge"
+        )
+        ChallengeList(
+          v-show="cdisplay=='corr'"
+          :challenges="filterChallenges('corr')"
+          @click-challenge="clickChallenge"
+        )
       div#div3
         .button-group
           button.tabbtn#btnGlive(@click="setDisplay('g','live',$event)")
             | {{ st.tr["Live games"] }}
           button.tabbtn#btnGcorr(@click="setDisplay('g','corr',$event)")
             | {{ st.tr["Correspondance games"] }}
-        GameList(v-show="gdisplay=='live'" :games="filterGames('live')"
-          :showBoth="true" @show-game="showGame")
-        GameList(v-show="gdisplay=='corr'" :games="filterGames('corr')"
-          :showBoth="true" @show-game="showGame")
+        GameList(
+          v-show="gdisplay=='live'"
+          :games="filterGames('live')"
+          :showBoth="true"
+          @show-game="showGame"
+        )
+        GameList(
+          v-show="gdisplay=='corr'"
+          :games="filterGames('corr')"
+          :showBoth="true"
+          @show-game="showGame"
+        )
 </template>
 
 <script>
@@ -81,6 +200,7 @@ import { ArrayFun } from "@/utils/array";
 import { ajax } from "@/utils/ajax";
 import params from "@/parameters";
 import { getRandString, shuffle } from "@/utils/alea";
+import { getDiagram } from "@/utils/printDiagram";
 import Chat from "@/components/Chat.vue";
 import GameList from "@/components/GameList.vue";
 import ChallengeList from "@/components/ChallengeList.vue";
@@ -104,10 +224,20 @@ export default {
       infoMessage: "",
       newchallenge: {
         fen: "",
-        vid: localStorage.getItem("vid") || "",
+        vid: parseInt(localStorage.getItem("vid")) || 0,
         to: "", //name of challenged player (if any)
-        cadence: localStorage.getItem("cadence") || ""
+        cadence: localStorage.getItem("cadence") || "",
+        randomness: parseInt(localStorage.getItem("challRandomness")) || 2,
+        // VariantRules object, stored to not interfere with
+        // diagrams of targetted challenges:
+        V: null,
+        vname: "",
+        diag: "", //visualizing FEN
+        memorize: false //put settings in localStorage
       },
+      tchallDiag: "",
+      curChallToAccept: {from: {}},
+      presetChalls: JSON.parse(localStorage.getItem("presetChalls") || "[]"),
       newChat: "",
       conn: null,
       connexionString: "",
@@ -121,82 +251,35 @@ export default {
     "st.variants": function() {
       // Set potential challenges and games variant names:
       this.challenges.concat(this.games).forEach(o => {
-        if (o.vname == "") o.vname = this.getVname(o.vid);
+        if (!o.vname) o.vname = this.getVname(o.vid);
       });
+      if (!this.newchallenge.V && this.newchallenge.vid > 0)
+        this.loadNewchallVariant();
     }
   },
   computed: {
     anonymousCount: function() {
       let count = 0;
       Object.values(this.people).forEach(p => {
-        count += !p.name ? 1 : 0;
+        // Do not cound people who did not send their identity yet:
+        count += (!p.name && p.id === 0) ? 1 : 0;
       });
       return count;
     }
   },
   created: function() {
+    if (this.st.variants.length > 0 && this.newchallenge.vid > 0)
+      this.loadNewchallVariant();
     const my = this.st.user;
-    this.$set(this.people, my.sid, { id: my.id, name: my.name, pages: ["/"] });
-    // Ask server for current corr games (all but mines)
-    ajax(
-      "/games",
-      "GET",
-      { uid: this.st.user.id, excluded: true },
-      response => {
-        this.games = this.games.concat(
-          response.games.map(g => {
-            const type = this.classifyObject(g);
-            const vname = this.getVname(g.vid);
-            return Object.assign({}, g, { type: type, vname: vname });
-          })
-        );
+    this.$set(
+      this.people,
+      my.sid,
+      {
+        id: my.id,
+        name: my.name,
+        pages: [{ path: "/", focus: true }]
       }
     );
-    // Also ask for corr challenges (open + sent by/to me)
-    ajax("/challenges", "GET", { uid: this.st.user.id }, response => {
-      // Gather all senders names, and then retrieve full identity:
-      // (TODO [perf]: some might be online...)
-      let names = {};
-      response.challenges.forEach(c => {
-        if (c.uid != this.st.user.id) names[c.uid] = "";
-        //unknwon for now
-        else if (!!c.target && c.target != this.st.user.id)
-          names[c.target] = "";
-      });
-      const addChallenges = () => {
-        names[this.st.user.id] = this.st.user.name; //in case of
-        this.challenges = this.challenges.concat(
-          response.challenges.map(c => {
-            const from = { name: names[c.uid], id: c.uid }; //or just name
-            const type = this.classifyObject(c);
-            const vname = this.getVname(c.vid);
-            return Object.assign(
-              {},
-              {
-                type: type,
-                vname: vname,
-                from: from,
-                to: c.target ? names[c.target] : ""
-              },
-              c
-            );
-          })
-        );
-      };
-      if (Object.keys(names).length > 0) {
-        ajax(
-          "/users",
-          "GET",
-          { ids: Object.keys(names).join(",") },
-          response2 => {
-            response2.users.forEach(u => {
-              names[u.id] = u.name;
-            });
-            addChallenges();
-          }
-        );
-      } else addChallenges();
-    });
     const connectAndPoll = () => {
       this.send("connect");
       this.send("pollclientsandgamers");
@@ -206,9 +289,12 @@ export default {
       params.socketUrl +
       "/?sid=" +
       this.st.user.sid +
+      "&id=" +
+      this.st.user.id +
       "&tmpId=" +
       getRandString() +
       "&page=" +
+      // Hall: path is "/" (could be hard-coded as well)
       encodeURIComponent(this.$route.path);
     this.conn = new WebSocket(this.connexionString);
     this.conn.onopen = connectAndPoll;
@@ -216,27 +302,183 @@ export default {
     this.conn.onclose = this.socketCloseListener;
   },
   mounted: function() {
+    document.addEventListener('visibilitychange', this.visibilityChange);
     ["peopleWrap", "infoDiv", "newgameDiv"].forEach(eltName => {
-      let elt = document.getElementById(eltName);
-      elt.addEventListener("click", processModalClick);
+      document.getElementById(eltName)
+        .addEventListener("click", processModalClick);
     });
     document.querySelectorAll("#predefinedCadences > button").forEach(b => {
       b.addEventListener("click", () => {
         this.newchallenge.cadence = b.innerHTML;
       });
     });
-    const showCtype = localStorage.getItem("type-challenges") || "live";
-    const showGtype = localStorage.getItem("type-games") || "live";
-    this.setDisplay("c", showCtype);
-    this.setDisplay("g", showGtype);
+    const dispCorr = this.$route.query["disp"];
+    const showCtype =
+      dispCorr || localStorage.getItem("type-challenges") || "live";
+    const showGtype =
+      dispCorr || localStorage.getItem("type-games") || "live";
+    this.setDisplay('c', showCtype);
+    this.setDisplay('g', showGtype);
+    // Ask server for current corr games (all but mines)
+    ajax(
+      "/games",
+      "GET",
+      {
+        data: { uid: this.st.user.id, excluded: true },
+        success: (response) => {
+          if (
+            response.games.length > 0 &&
+            this.games.length == 0 &&
+            this.gdisplay == "live"
+          ) {
+            document
+              .getElementById("btnGcorr")
+              .classList.add("somethingnew");
+          }
+          this.games = this.games.concat(
+            response.games.map(g => {
+              const type = this.classifyObject(g);
+              const vname = this.getVname(g.vid);
+              return Object.assign(
+                {},
+                g,
+                {
+                  type: type,
+                  vname: vname
+                }
+              );
+            })
+          );
+        }
+      }
+    );
+    // Also ask for corr challenges (open + sent by/to me)
+    ajax(
+      "/challenges",
+      "GET",
+      {
+        data: { uid: this.st.user.id },
+        success: (response) => {
+          if (
+            response.challenges.length > 0 &&
+            this.challenges.length == 0 &&
+            this.cdisplay == "live"
+          ) {
+            document
+              .getElementById("btnCcorr")
+              .classList.add("somethingnew");
+          }
+          // Gather all senders names, and then retrieve full identity:
+          // (TODO [perf]: some might be online...)
+          let names = {};
+          response.challenges.forEach(c => {
+            if (c.uid != this.st.user.id) names[c.uid] = "";
+            else if (!!c.target && c.target != this.st.user.id)
+              names[c.target] = "";
+          });
+          const addChallenges = () => {
+            names[this.st.user.id] = this.st.user.name; //in case of
+            this.challenges = this.challenges.concat(
+              response.challenges.map(c => {
+                const from = { name: names[c.uid], id: c.uid }; //or just name
+                const type = this.classifyObject(c);
+                const vname = this.getVname(c.vid);
+                return Object.assign(
+                  {},
+                  {
+                    type: type,
+                    vname: vname,
+                    from: from,
+                    to: c.target ? names[c.target] : ""
+                  },
+                  c
+                );
+              })
+            );
+          };
+          if (Object.keys(names).length > 0) {
+            ajax(
+              "/users",
+              "GET",
+              {
+                data: { ids: Object.keys(names).join(",") },
+                success: (response2) => {
+                  response2.users.forEach(u => {
+                    names[u.id] = u.name;
+                  });
+                  addChallenges();
+                }
+              }
+            );
+          } else addChallenges();
+        }
+      }
+    );
   },
   beforeDestroy: function() {
+    document.removeEventListener('visibilitychange', this.visibilityChange);
     this.send("disconnect");
   },
   methods: {
-    // Helpers:
+    getRandomnessClass: function(pc) {
+      return {
+        ["random-" + pc.randomness]: true
+      };
+    },
+    visibilityChange: function() {
+      // TODO: Use document.hidden? https://webplatform.news/issues/2019-03-27
+      this.send(
+        document.visibilityState == "visible"
+          ? "getfocus"
+          : "losefocus"
+      );
+    },
+    partialResetNewchallenge: function() {
+      // Reset potential target and custom FEN:
+      this.newchallenge.to = "";
+      this.newchallenge.fen = "";
+      this.newchallenge.diag = "";
+      this.newchallenge.memorize = false;
+    },
+    showNewchallengeForm: function() {
+      this.partialResetNewchallenge();
+      window.doClick("modalNewgame");
+    },
+    addPresetChall: function(chall) {
+      // Add only if not already existing:
+      if (this.presetChalls.some(c =>
+        c.vid == chall.vid &&
+        c.cadence == chall.cadence &&
+        c.randomness == chall.randomness
+      )) {
+        return;
+      }
+      const L = this.presetChalls.length;
+      this.presetChalls.push({
+        index: L,
+        vid: chall.vid,
+        vname: chall.vname, //redundant, but easier
+        cadence: chall.cadence,
+        randomness: chall.randomness
+      });
+      localStorage.setItem("presetChalls", JSON.stringify(this.presetChalls));
+    },
+    removePresetChall: function(e, pchall) {
+      e.stopPropagation();
+      const pchallIdx = this.presetChalls.findIndex(pc => pc.index == pchall.index);
+      this.presetChalls.splice(pchallIdx, 1);
+      localStorage.setItem("presetChalls", JSON.stringify(this.presetChalls));
+    },
+    tchallButtonsMargin: function() {
+      if (!!this.curChallToAccept.fen) return { "margin-top": "10px" };
+      return {};
+    },
+    cadenceFocusIfOpened: function() {
+      if (event.target.checked)
+        document.getElementById("cadence").focus();
+    },
     send: function(code, obj) {
-      if (this.conn) {
+      if (!!this.conn) {
         this.conn.send(JSON.stringify(Object.assign({ code: code }, obj)));
       }
     },
@@ -252,7 +494,7 @@ export default {
       return this.games.filter(g => g.type == type);
     },
     classifyObject: function(o) {
-      //challenge or game
+      // o: challenge or game
       return o.cadence.indexOf("d") === -1 ? "live" : "corr";
     },
     setDisplay: function(letter, type, e) {
@@ -266,34 +508,43 @@ export default {
         : document.getElementById("btn" + letter.toUpperCase() + type);
       elt.classList.add("active");
       elt.classList.remove("somethingnew"); //in case of
-      if (elt.previousElementSibling)
+      if (!!elt.previousElementSibling)
         elt.previousElementSibling.classList.remove("active");
       else elt.nextElementSibling.classList.remove("active");
     },
     isGamer: function(sid) {
-      return this.people[sid].pages.some(p => p.indexOf("/game/") >= 0);
-    },
-    getActionLabel: function(sid) {
-      return this.people[sid].pages.some(p => p == "/")
-        ? "Challenge"
-        : "Observe";
-    },
-    challOrWatch: function(sid) {
-      if (this.people[sid].pages.some(p => p == "/")) {
-        // Available, in Hall
-        this.newchallenge.to = this.people[sid].name;
-        document.getElementById("modalPeople").checked = false;
-        window.doClick("modalNewgame");
-      } else {
-        // In some game, maybe playing maybe not: show a random one
-        let gids = [];
-        this.people[sid].pages.forEach(p => {
-          const matchGid = p.match(/[a-zA-Z0-9]+$/);
-          if (matchGid) gids.push(matchGid[0]);
-        });
-        const gid = gids[Math.floor(Math.random() * gids.length)];
-        this.showGame(this.games.find(g => g.id == gid));
-      }
+      return this.people[sid].pages
+        .some(p => p.focus && p.path.indexOf("/game/") >= 0);
+    },
+    isFocusedOnHall: function(sid) {
+      return (
+        // This is meant to challenge people, thus the next 2 conditions:
+        this.st.user.id > 0 &&
+        sid != this.st.user.sid &&
+        this.people[sid].pages.some(p => p.path == "/" && p.focus)
+      );
+    },
+    challenge: function(sid) {
+      this.partialResetNewchallenge();
+      // Available, in Hall
+      this.newchallenge.to = this.people[sid].name;
+      // TODO: also store target sid to not re-search for it
+      document.getElementById("modalPeople").checked = false;
+      window.doClick("modalNewgame");
+    },
+    watchGame: function(sid) {
+      // In some game, maybe playing maybe not: show a random one
+      let gids = [];
+      this.people[sid].pages.forEach(p => {
+        if (p.focus) {
+          const matchGid = p.path.match(/[a-zA-Z0-9]+$/);
+          if (!!matchGid) gids.push(matchGid[0]);
+        }
+      });
+      const gid = gids[Math.floor(Math.random() * gids.length)];
+      const game = this.games.find(g => g.id == gid);
+      if (!!game) this.showGame(game);
+      else this.$router.push("/game/" + gid); //game vs. me
     },
     showGame: function(g) {
       // NOTE: we are an observer, since only games I don't play are shown here
@@ -303,13 +554,22 @@ export default {
         url += "?rid=" + g.rids[Math.floor(Math.random() * g.rids.length)];
       this.$router.push(url);
     },
-    resetChatColor: function() {
+    resetSocialColor: function() {
       // TODO: this is called twice, once on opening an once on closing
       document.getElementById("peopleBtn").classList.remove("somethingnew");
     },
     processChat: function(chat) {
       this.send("newchat", { data: chat });
     },
+    getOppsid: function(c) {
+      let oppsid = c.from.sid; //may not be defined if corr + offline opp
+      if (!oppsid) {
+        oppsid = Object.keys(this.people).find(
+          sid => this.people[sid].id == c.from.id
+        );
+      }
+      return oppsid;
+    },
     // Messaging center:
     socketMessageListener: function(msg) {
       if (!this.conn) return;
@@ -322,17 +582,19 @@ export default {
           data.sockIds.forEach(s => {
             const page = s.page || "/";
             if (s.sid != this.st.user.sid && !identityAsked[s.sid]) {
-              identityAsked[s.sid] = true;
               this.send("askidentity", { target: s.sid, page: page });
+              identityAsked[s.sid] = true;
             }
-            if (!this.people[s.sid])
-              this.$set(this.people, s.sid, { id: 0, name: "", pages: [page] });
-            else if (this.people[s.sid].pages.indexOf(page) < 0)
-              this.people[s.sid].pages.push(page);
+            if (!this.people[s.sid]) {
+              // Do not set name or id: identity unknown yet
+              this.people[s.sid] = { pages: [{path: page, focus: true}] };
+            }
+            else if (!(this.people[s.sid].pages.find(p => p.path == page)))
+              this.people[s.sid].pages.push({ path: page, focus: true });
             if (!s.page)
-              //peer is in Hall
-              this.send("askchallenge", { target: s.sid });
-            //peer is in Game
+              // Peer is in Hall
+              this.send("askchallenges", { target: s.sid });
+            // Peer is in Game
             else this.send("askgame", { target: s.sid, page: page });
           });
           break;
@@ -340,24 +602,19 @@ export default {
         case "connect":
         case "gconnect": {
           const page = data.page || "/";
-          // NOTE: player could have been polled earlier, but might have logged in then
-          // So it's a good idea to ask identity if he was anonymous.
-          // But only ask game / challenge if currently disconnected.
+          // Only ask game / challenges if first connexion:
           if (!this.people[data.from]) {
-            this.$set(this.people, data.from, {
-              name: "",
-              id: 0,
-              pages: [page]
-            });
+            this.people[data.from] = { pages: [{ path: page, focus: true }] };
             if (data.code == "connect")
-              this.send("askchallenge", { target: data.from });
+              this.send("askchallenges", { target: data.from });
             else this.send("askgame", { target: data.from, page: page });
           } else {
-            // append page if not already in list
-            if (this.people[data.from].pages.indexOf(page) < 0)
-              this.people[data.from].pages.push(page);
+            // Append page if not already in list
+            if (!(this.people[data.from].pages.find(p => p.path == page)))
+              this.people[data.from].pages.push({ path: page, focus: true });
           }
-          if (this.people[data.from].id == 0) {
+          if (!this.people[data.from].name && this.people[data.from].id !== 0) {
+            // Identity not known yet
             this.newConnect[data.from] = true; //for self multi-connects tests
             this.send("askidentity", { target: data.from, page: page });
           }
@@ -371,8 +628,12 @@ export default {
           if (!this.people[data.from]) return;
           // Disconnect means no more tmpIds:
           if (data.code == "disconnect") {
-            // Remove the live challenge sent by this player:
-            ArrayFun.remove(this.challenges, c => c.from.sid == data.from);
+            // Remove the live challenges sent by this player:
+            ArrayFun.remove(
+              this.challenges,
+              c => c.type == "live" && c.from.sid == data.from,
+              "all"
+            );
           } else {
             // Remove the matching live game if now unreachable
             const gid = data.page.match(/[a-zA-Z0-9]+$/)[0];
@@ -389,19 +650,30 @@ export default {
             }
           }
           const page = data.page || "/";
-          ArrayFun.remove(this.people[data.from].pages, p => p == page);
+          ArrayFun.remove(this.people[data.from].pages, p => p.path == page);
           if (this.people[data.from].pages.length == 0)
             this.$delete(this.people, data.from);
           break;
         }
+        case "getfocus":
+          // If user reload a page, focus may arrive earlier than connect
+          if (!!this.people[data.from]) {
+            this.people[data.from].pages
+              .find(p => p.path == data.page).focus = true;
+            this.$forceUpdate(); //TODO: shouldn't be required
+          }
+          break;
+        case "losefocus":
+          if (!!this.people[data.from]) {
+            this.people[data.from].pages
+              .find(p => p.path == data.page).focus = false;
+            this.$forceUpdate(); //TODO: shouldn't be required
+          }
+          break;
         case "killed":
           // I logged in elsewhere:
-          alert(this.st.tr["New connexion detected: tab now offline"]);
-          // TODO: this fails. See https://github.com/websockets/ws/issues/489
-          //this.conn.removeEventListener("message", this.socketMessageListener);
-          //this.conn.removeEventListener("close", this.socketCloseListener);
-          //this.conn.close();
           this.conn = null;
+          alert(this.st.tr["New connexion detected: tab now offline"]);
           break;
         case "askidentity": {
           // Request for identification (TODO: anonymous shouldn't need to reply)
@@ -416,131 +688,120 @@ export default {
         }
         case "identity": {
           const user = data.data;
-          if (user.name) {
-            //otherwise anonymous
-            // If I multi-connect, kill current connexion if no mark (I'm older)
+          let player = this.people[user.sid];
+          // player.pages is already set
+          player.id = user.id;
+          player.name = user.name;
+          // TODO: this.$set(people, ...) fails. So forceUpdate.
+          //       But this shouldn't be like that!
+          this.$forceUpdate();
+          // If I multi-connect, kill current connexion if no mark (I'm older)
+          if (this.newConnect[user.sid]) {
             if (
-              this.newConnect[user.sid] &&
               user.id > 0 &&
               user.id == this.st.user.id &&
-              user.sid != this.st.user.sid
+              user.sid != this.st.user.sid &&
+              !this.killed[this.st.user.sid]
             ) {
-              if (!this.killed[this.st.user.sid]) {
                 this.send("killme", { sid: this.st.user.sid });
                 this.killed[this.st.user.sid] = true;
-              }
-            }
-            if (user.sid != this.st.user.sid) {
-              //I already know my identity...
-              this.$set(this.people, user.sid, {
-                id: user.id,
-                name: user.name,
-                pages: this.people[user.sid].pages
-              });
             }
+            delete this.newConnect[user.sid];
           }
-          delete this.newConnect[user.sid];
           break;
         }
-        case "askchallenge": {
-          // Send my current live challenge (if any)
-          const cIdx = this.challenges.findIndex(
-            c => c.from.sid == this.st.user.sid && c.type == "live"
-          );
-          if (cIdx >= 0) {
-            const c = this.challenges[cIdx];
-            // NOTE: in principle, should only send targeted challenge to the target.
-            // But we may not know yet the identity of the target (just name),
-            // so cannot decide if data.from is the target or not.
-            const myChallenge = {
-              id: c.id,
-              from: this.st.user.sid,
-              to: c.to,
-              fen: c.fen,
-              vid: c.vid,
-              cadence: c.cadence,
-              added: c.added
-            };
-            this.send("challenge", { data: myChallenge, target: data.from });
-          }
+        case "askchallenges": {
+          // Send my current live challenges (if any)
+          const myChallenges = this.challenges
+            .filter(c =>
+              c.from.sid == this.st.user.sid && c.type == "live"
+            )
+            .map(c => {
+              // NOTE: in principle, should only send targeted challenge to the target.
+              // But we may not know yet the identity of the target (just name),
+              // so cannot decide if data.from is the target or not.
+              return {
+                id: c.id,
+                from: this.st.user.sid,
+                to: c.to,
+                randomness: c.randomness,
+                fen: c.fen,
+                vid: c.vid,
+                cadence: c.cadence,
+                added: c.added
+              };
+            });
+          if (myChallenges.length > 0)
+            this.send("challenges", { data: myChallenges, target: data.from });
           break;
         }
-        case "challenge": //after "askchallenge"
-        case "newchallenge": {
-          // NOTE about next condition: see "askchallenge" case.
-          const chall = data.data;
-          if (
-            !chall.to ||
-            (this.people[chall.from].id > 0 &&
-              (chall.from == this.st.user.sid || chall.to == this.st.user.name))
-          ) {
-            let newChall = Object.assign({}, chall);
-            newChall.type = this.classifyObject(chall);
-            newChall.added = Date.now();
-            let fromValues = Object.assign({}, this.people[chall.from]);
-            delete fromValues["pages"]; //irrelevant in this context
-            newChall.from = Object.assign({ sid: chall.from }, fromValues);
-            newChall.vname = this.getVname(newChall.vid);
-            this.challenges.push(newChall);
-            if (
-              (newChall.type == "live" && this.cdisplay == "corr") ||
-              (newChall.type == "corr" && this.cdisplay == "live")
-            ) {
-              document
-                .getElementById("btnC" + newChall.type)
-                .classList.add("somethingnew");
-            }
-          }
+        case "challenges": //after "askchallenges"
+          data.data.forEach(this.addChallenge);
+          break;
+        case "newchallenge":
+          this.addChallenge(data.data);
           break;
-        }
         case "refusechallenge": {
           const cid = data.data;
           ArrayFun.remove(this.challenges, c => c.id == cid);
           alert(this.st.tr["Challenge declined"]);
           break;
         }
-        case "deletechallenge": {
-          // NOTE: the challenge may be already removed
-          const cid = data.data;
-          ArrayFun.remove(this.challenges, c => c.id == cid);
+        case "deletechallenge_s": {
+          // NOTE: the challenge(s) may be already removed
+          const cref = data.data;
+          if (!!cref.cid) ArrayFun.remove(this.challenges, c => c.id == cref.cid);
+          else if (!!cref.sids) {
+            cref.sids.forEach(s => {
+              ArrayFun.remove(
+                this.challenges,
+                c => c.type == "live" && c.from.sid == s,
+                "all"
+              );
+            });
+          }
           break;
         }
         case "game": //individual request
         case "newgame": {
-          // NOTE: it may be live or correspondance
           const game = data.data;
-          let locGame = this.games.find(g => g.id == game.id);
-          if (!locGame) {
-            let newGame = game;
-            newGame.type = this.classifyObject(game);
-            newGame.vname = this.getVname(game.vid);
-            if (!game.score)
-              //if new game from Hall
-              newGame.score = "*";
-            newGame.rids = [game.rid];
-            delete newGame["rid"];
-            this.games.push(newGame);
-            if (
-              (newGame.type == "live" && this.gdisplay == "corr") ||
-              (newGame.type == "corr" && this.gdisplay == "live")
-            ) {
-              document
-                .getElementById("btnG" + newGame.type)
-                .classList.add("somethingnew");
+          // Ignore games where I play (will go in MyGames page)
+          if (game.players.every(p =>
+            p.sid != this.st.user.sid || p.uid != this.st.user.id))
+          {
+            let locGame = this.games.find(g => g.id == game.id);
+            if (!locGame) {
+              let newGame = game;
+              newGame.type = this.classifyObject(game);
+              newGame.vname = this.getVname(game.vid);
+              if (!game.score)
+                // New game from Hall
+                newGame.score = "*";
+              newGame.rids = [game.rid];
+              delete newGame["rid"];
+              this.games.push(newGame);
+              if (
+                (newGame.type == "live" && this.gdisplay == "corr") ||
+                (newGame.type == "corr" && this.gdisplay == "live")
+              ) {
+                document
+                  .getElementById("btnG" + newGame.type)
+                  .classList.add("somethingnew");
+              }
+            } else {
+              // Append rid (if not already in list)
+              if (!locGame.rids.includes(game.rid)) locGame.rids.push(game.rid);
             }
-          } else {
-            // Append rid (if not already in list)
-            if (!locGame.rids.includes(game.rid)) locGame.rids.push(game.rid);
           }
           break;
         }
         case "result": {
           let g = this.games.find(g => g.id == data.gid);
-          if (g) g.score = data.score;
+          if (!!g) g.score = data.score;
           break;
         }
         case "startgame": {
-          // New game just started: data contain all information
+          // New game just started, I'm involved
           const gameInfo = data.data;
           if (this.classifyObject(gameInfo) == "live")
             this.startNewGame(gameInfo);
@@ -553,8 +814,7 @@ export default {
               "#/game/" +
               gameInfo.id +
               "</a>";
-            let modalBox = document.getElementById("modalInfo");
-            modalBox.checked = true;
+            document.getElementById("modalInfo").checked = true;
           }
           break;
         }
@@ -572,53 +832,149 @@ export default {
       this.conn.addEventListener("close", this.socketCloseListener);
     },
     // Challenge lifecycle:
-    newChallenge: async function() {
+    addChallenge: function(chall) {
+      // NOTE about next condition: see "askchallenges" case.
+      if (
+        !chall.to ||
+        (this.people[chall.from].id > 0 &&
+          (chall.from == this.st.user.sid || chall.to == this.st.user.name))
+      ) {
+        let newChall = Object.assign({}, chall);
+        newChall.type = this.classifyObject(chall);
+        newChall.randomness = chall.randomness;
+        newChall.added = Date.now();
+        let fromValues = Object.assign({}, this.people[chall.from]);
+        delete fromValues["pages"]; //irrelevant in this context
+        newChall.from = Object.assign({ sid: chall.from }, fromValues);
+        newChall.vname = this.getVname(newChall.vid);
+        this.challenges.push(newChall);
+        if (
+          (newChall.type == "live" && this.cdisplay == "corr") ||
+          (newChall.type == "corr" && this.cdisplay == "live")
+        ) {
+          document
+            .getElementById("btnC" + newChall.type)
+            .classList.add("somethingnew");
+        }
+      }
+    },
+    loadNewchallVariant: async function(cb) {
+      const vname = this.getVname(this.newchallenge.vid);
+      const vModule = await import("@/variants/" + vname + ".js");
+      this.newchallenge.V = vModule.VariantRules;
+      this.newchallenge.vname = vname;
+      if (!!cb) cb();
+    },
+    trySetNewchallDiag: function() {
+      if (!this.newchallenge.fen) {
+        this.newchallenge.diag = "";
+        return;
+      }
+      // If vid > 0 then the variant is loaded (function above):
+      window.V = this.newchallenge.V;
+      if (
+        this.newchallenge.vid > 0 &&
+        !!this.newchallenge.fen &&
+        V.IsGoodFen(this.newchallenge.fen)
+      ) {
+        const parsedFen = V.ParseFen(this.newchallenge.fen);
+        this.newchallenge.diag = getDiagram({
+          position: parsedFen.position,
+          orientation: parsedFen.turn
+        });
+      }
+    },
+    newChallFromPreset(pchall) {
+      this.partialResetNewchallenge();
+      this.newchallenge.vid = pchall.vid;
+      this.newchallenge.cadence = pchall.cadence;
+      this.newchallenge.randomness = pchall.randomness;
+      this.loadNewchallVariant(this.issueNewChallenge);
+    },
+    issueNewChallenge: async function() {
+      if (!!(this.newchallenge.cadence.match(/^[0-9]+$/)))
+        this.newchallenge.cadence += "+0"; //assume minutes, no increment
+      const ctype = this.classifyObject(this.newchallenge);
+      // TODO: cadence still unchecked so ctype could be wrong...
       let error = "";
-      if (this.newchallenge.vid == "")
+      if (!this.newchallenge.vid)
         error = this.st.tr["Please select a variant"];
-      else if (!!this.newchallenge.to && this.newchallenge.to == this.st.user.name)
-        error = this.st.tr["Self-challenge is forbidden"];
+      else if (ctype == "corr" && this.st.user.id <= 0)
+        error = this.st.tr["Please log in to play correspondance games"];
+      else if (!!this.newchallenge.to) {
+        if (this.newchallenge.to == this.st.user.name)
+          error = this.st.tr["Self-challenge is forbidden"];
+        else if (
+          ctype == "live" &&
+          Object.values(this.people).every(p => p.name != this.newchallenge.to)
+        )
+          error = this.newchallenge.to + " " + this.st.tr["is not online"];
+      }
       if (error) {
         alert(error);
         return;
       }
-      const vname = this.getVname(this.newchallenge.vid);
-      const vModule = await import("@/variants/" + vname + ".js");
-      window.V = vModule.VariantRules;
-      if (this.newchallenge.cadence.match(/^[0-9]+$/))
-        this.newchallenge.cadence += "+0"; //assume minutes, no increment
-      const ctype = this.classifyObject(this.newchallenge);
+      window.V = this.newchallenge.V;
       error = checkChallenge(this.newchallenge);
-      if (!error && ctype == "corr" && this.st.user.id <= 0)
-        error = this.st.tr["Please log in to play correspondance games"];
       if (error) {
         alert(error);
         return;
       }
       // NOTE: "from" information is not required here
       let chall = Object.assign({}, this.newchallenge);
+      // Add only if not already issued (not counting target or FEN):
+      if (this.challenges.some(c =>
+        (c.from.sid == this.st.user.sid || c.from.id == this.st.user.id) &&
+        c.vid == chall.vid &&
+        c.cadence == chall.cadence &&
+        c.randomness == chall.randomness
+      )) {
+        alert(this.st.tr["Challenge already exists"]);
+        return;
+      }
+      if (this.newchallenge.memorize) this.addPresetChall(this.newchallenge);
+      delete chall["V"];
+      delete chall["diag"];
       const finishAddChallenge = cid => {
         chall.id = cid || "c" + getRandString();
-        // Remove old challenge if any (only one at a time of a given type):
-        const cIdx = this.challenges.findIndex(
-          c =>
-            (c.from.sid == this.st.user.sid || c.from.id == this.st.user.id) &&
-            c.type == ctype
-        );
-        if (cIdx >= 0) {
-          // Delete current challenge (will be replaced now)
-          this.send("deletechallenge", { data: this.challenges[cIdx].id });
+        const MAX_ALLOWED_CHALLS = 3;
+        // Remove oldest challenge if 3 found: only 3 at a time of a given type
+        let countMyChalls = 0;
+        let challToDelIdx = 0;
+        let oldestAdded = Number.MAX_SAFE_INTEGER;
+        for (let i=0; i<this.challenges.length; i++) {
+          const c = this.challenges[i];
+          if (
+            c.type == ctype &&
+            (c.from.sid == this.st.user.sid || c.from.id == this.st.user.id)
+          ) {
+            countMyChalls++;
+            if (c.added < oldestAdded) {
+              challToDelIdx = i;
+              oldestAdded = c.added;
+            }
+          }
+        }
+        if (countMyChalls >= MAX_ALLOWED_CHALLS) {
+          this.send(
+            "deletechallenge_s",
+            { data: { cid: this.challenges[challToDelIdx].id } }
+          );
           if (ctype == "corr") {
-            ajax("/challenges", "DELETE", { id: this.challenges[cIdx].id });
+            ajax(
+              "/challenges",
+              "DELETE",
+              { data: { id: this.challenges[challToDelIdx].id } }
+            );
           }
-          this.challenges.splice(cIdx, 1);
+          this.challenges.splice(challToDelIdx, 1);
         }
         this.send("newchallenge", {
           data: Object.assign({ from: this.st.user.sid }, chall)
         });
         // Add new challenge:
         chall.from = {
-          //decompose to avoid revealing email
+          // Decompose to avoid revealing email
           sid: this.st.user.sid,
           id: this.st.user.id,
           name: this.st.user.name
@@ -626,24 +982,76 @@ export default {
         chall.added = Date.now();
         // NOTE: vname and type are redundant (can be deduced from cadence + vid)
         chall.type = ctype;
-        chall.vname = vname;
+        chall.vname = this.newchallenge.vname;
         this.challenges.push(chall);
         // Remember cadence  + vid for quicker further challenges:
         localStorage.setItem("cadence", chall.cadence);
         localStorage.setItem("vid", chall.vid);
+        localStorage.setItem("challRandomness", chall.randomness);
         document.getElementById("modalNewgame").checked = false;
+        // Show the challenge if not on current display
+        if (
+          (ctype == "live" && this.cdisplay == "corr") ||
+          (ctype == "corr" && this.cdisplay == "live")
+        ) {
+          this.setDisplay('c', ctype);
+        }
       };
       if (ctype == "live") {
         // Live challenges have a random ID
         finishAddChallenge(null);
       } else {
         // Correspondance game: send challenge to server
-        ajax("/challenges", "POST", { chall: chall }, response => {
-          finishAddChallenge(response.cid);
-        });
+        ajax(
+          "/challenges",
+          "POST",
+          {
+            data: { chall: chall },
+            success: (response) => {
+              finishAddChallenge(response.cid);
+            }
+          }
+        );
       }
     },
-    clickChallenge: function(c) {
+    // Callback function after a diagram was showed to accept
+    // or refuse targetted challenge:
+    decisionChallenge: function(accepted) {
+      this.curChallToAccept.accepted = accepted;
+      this.finishProcessingChallenge(this.curChallToAccept);
+      document.getElementById("modalAccept").checked = false;
+    },
+    finishProcessingChallenge: function(c) {
+      if (c.accepted) {
+        c.seat = {
+          // Again, avoid c.seat = st.user to not reveal email
+          sid: this.st.user.sid,
+          id: this.st.user.id,
+          name: this.st.user.name
+        };
+        this.launchGame(c);
+        if (c.type == "live")
+          // Remove all live challenges of both players
+          this.send("deletechallenge_s", { data: { sids: [c.from.sid, c.seat.sid] } });
+        else
+          // Corr challenge: just remove the challenge
+          this.send("deletechallenge_s", { data: { cid: c.id } });
+      } else {
+        const oppsid = this.getOppsid(c);
+        if (!!oppsid)
+          this.send("refusechallenge", { data: c.id, target: oppsid });
+        if (c.type == "corr") {
+          ajax(
+            "/challenges",
+            "DELETE",
+            { data: { id: c.id } }
+          );
+        }
+        this.send("deletechallenge_s", { data: { cid: c.id } });
+      }
+    },
+    // TODO: if several players click same challenge at the same time: problem
+    clickChallenge: async function(c) {
       const myChallenge =
         c.from.sid == this.st.user.sid || //live
         (this.st.user.id > 0 && c.from.id == this.st.user.id); //corr
@@ -653,92 +1061,131 @@ export default {
           return;
         }
         c.accepted = true;
-        if (c.to) {
-          //c.to == this.st.user.name (connected)
-          // TODO: if special FEN, show diagram after loading variant
-          c.accepted = confirm("Accept challenge?");
-        }
-        if (c.accepted) {
-          c.seat = {
-            //again, avoid c.seat = st.user to not reveal email
-            sid: this.st.user.sid,
-            id: this.st.user.id,
-            name: this.st.user.name
-          };
-          this.launchGame(c);
-        } else {
-          this.send("refusechallenge", { data: c.id, target: c.from.sid });
+        const vModule = await import("@/variants/" + c.vname + ".js");
+        window.V = vModule.VariantRules;
+        if (!!c.to) {
+          // c.to == this.st.user.name (connected)
+          if (!!c.fen) {
+            const parsedFen = V.ParseFen(c.fen);
+            c.mycolor = V.GetOppCol(parsedFen.turn);
+            this.tchallDiag = getDiagram({
+              position: parsedFen.position,
+              orientation: c.mycolor
+            });
+          }
+          this.curChallToAccept = c;
+          document.getElementById("modalAccept").checked = true;
         }
-        this.send("deletechallenge", { data: c.id });
-      } //my challenge
+        else this.finishProcessingChallenge(c);
+      }
       else {
+        // My challenge
         if (c.type == "corr") {
-          ajax("/challenges", "DELETE", { id: c.id });
+          ajax(
+            "/challenges",
+            "DELETE",
+            { data: { id: c.id } }
+          );
         }
-        this.send("deletechallenge", { data: c.id });
+        this.send("deletechallenge_s", { data: { cid: c.id } });
       }
       // In all cases, the challenge is consumed:
       ArrayFun.remove(this.challenges, ch => ch.id == c.id);
     },
     // NOTE: when launching game, the challenge is already being deleted
-    launchGame: async function(c) {
-      const vModule = await import("@/variants/" + c.vname + ".js");
-      window.V = vModule.VariantRules;
+    launchGame: function(c) {
+      let players =
+        !!c.mycolor
+          ? (c.mycolor == "w" ? [c.seat, c.from] : [c.from, c.seat])
+          : shuffle([c.from, c.seat]);
+      // Convention for players IDs in stored games is 'uid'
+      players.forEach(p => {
+        let pWithUid = p;
+        pWithUid["uid"] = p.id;
+        delete pWithUid["id"];
+      });
       // These game informations will be shared
       let gameInfo = {
         id: getRandString(),
-        fen: c.fen || V.GenRandInitFen(),
-        players: shuffle([c.from, c.seat]), //white then black
+        fen: c.fen || V.GenRandInitFen(c.randomness),
+        // White player index 0, black player index 1:
+        players: c.mycolor
+          ? (c.mycolor == "w" ? [c.seat, c.from] : [c.from, c.seat])
+          : shuffle([c.from, c.seat]),
         vid: c.vid,
         cadence: c.cadence
       };
-      let oppsid = c.from.sid; //may not be defined if corr + offline opp
-      if (!oppsid) {
-        oppsid = Object.keys(this.people).find(
-          sid => this.people[sid].id == c.from.id
-        );
-      }
       const notifyNewgame = () => {
-        if (oppsid)
-          //opponent is online
+        const oppsid = this.getOppsid(c);
+        if (!!oppsid)
+          // Opponent is online
           this.send("startgame", { data: gameInfo, target: oppsid });
-        // Send game info (only if live) to everyone except me in this tab
-        this.send("newgame", { data: gameInfo });
+        // Send game info (only if live) to everyone except me and opponent
+        // TODO: this double message send could be avoided.
+        this.send("newgame", { data: gameInfo, oppsid: oppsid });
+        // Also to MyGames page:
+        this.send(
+          "notifynewgame",
+          {
+            data: gameInfo,
+            targets: gameInfo.players.map(p => {
+              return { sid: p.sid, uid: p.uid };
+            })
+          }
+        );
       };
       if (c.type == "live") {
         notifyNewgame();
         this.startNewGame(gameInfo);
-      } //corr: game only on server
-      else {
+      } else {
+        // corr: game only on server
         ajax(
           "/games",
           "POST",
-          { gameInfo: gameInfo, cid: c.id }, //cid useful to delete challenge
-          response => {
-            gameInfo.id = response.gameId;
-            notifyNewgame();
-            this.$router.push("/game/" + response.gameId);
+          {
+            // cid is useful to delete the challenge:
+            data: { gameInfo: gameInfo, cid: c.id },
+            success: (response) => {
+              gameInfo.id = response.gameId;
+              notifyNewgame();
+              this.$router.push("/game/" + response.gameId);
+            }
           }
         );
       }
     },
     // NOTE: for live games only (corr games start on the server)
     startNewGame: function(gameInfo) {
-      const game = Object.assign({}, gameInfo, {
-        // (other) Game infos: constant
-        fenStart: gameInfo.fen,
-        vname: this.getVname(gameInfo.vid),
-        created: Date.now(),
-        // Game state (including FEN): will be updated
-        moves: [],
-        clocks: [-1, -1], //-1 = unstarted
-        initime: [0, 0], //initialized later
-        score: "*"
-      });
-      GameStorage.add(game);
-      if (this.st.settings.sound >= 1)
-        new Audio("/sounds/newgame.mp3").play().catch(() => {});
-      this.$router.push("/game/" + gameInfo.id);
+      const game = Object.assign(
+        {},
+        gameInfo,
+        {
+          // (other) Game infos: constant
+          fenStart: gameInfo.fen,
+          vname: this.getVname(gameInfo.vid),
+          created: Date.now(),
+          // Game state (including FEN): will be updated
+          moves: [],
+          clocks: [-1, -1], //-1 = unstarted
+          initime: [0, 0], //initialized later
+          score: "*"
+        }
+      );
+      setTimeout(
+        () => {
+          GameStorage.add(game, (err) => {
+            // If an error occurred, game is not added: a tab already
+            // added the game and (if focused) is redirected toward it.
+            // If no error and the tab is hidden: do not show anything.
+            if (!err && !document.hidden) {
+              if (this.st.settings.sound)
+                new Audio("/sounds/newgame.flac").play().catch(() => {});
+              this.$router.push("/game/" + gameInfo.id);
+            }
+          });
+        },
+        document.hidden ? 500 + 1000 * Math.random() : 0
+      );
     }
   }
 };
@@ -752,7 +1199,7 @@ export default {
   padding: 15px 0
   max-width: 430px
 
-#newgameDiv > .card
+#newgameDiv > .card, #acceptDiv > .card
   max-width: 767px
   max-height: 100%
 
@@ -775,21 +1222,27 @@ div#peopleWrap > .card
   width: 50%
   position: relative
   float: left
+
 #chat
   width: 50%
   float: left
   position: relative
+
 @media screen and (max-width: 767px)
   #players, #chats
     width: 100%
+
 #chat > .card
   max-width: 100%
   margin: 0;
   border: none;
+
 #players > p
   margin-left: 5px
+
 .anonymous
   font-style: italic
+
 button.player-action
   margin-left: 32px
 
@@ -799,9 +1252,50 @@ button.player-action
 .tabbtn
   background-color: #f9faee
 
+button.acceptBtn
+  background-color: lightgreen
+button.refuseBtn
+  background-color: red
+
+#buttonsTchall
+  // margin-top set dynamically (depends if diagram showed or not)
+  & > button > span
+    width: 100%
+    text-align: center
+
+.variantName
+  font-weight: bold
+
+.diagram
+  margin: 0 auto
+  max-width: 400px
+  // width: 100% required for Firefox
+  width: 100%
+
+#inputFen
+  width: 100%
+
 #div2, #div3
   margin-top: 15px
 @media screen and (max-width: 767px)
   #div2, #div3
     margin-top: 0
+
+tr > td
+  &.random-0
+    background-color: #FF5733
+  &.random-1
+    background-color: #2B63B4
+  &.random-2
+    background-color: #33B42B
+
+@media screen and (max-width: 767px)
+  h4
+    margin: 5px 0
+
+td.remove-preset
+  background-color: lightgrey
+  text-align: center
+  & > img
+    height: 1em
 </style>