Add Checkered1 + fix last move highlights

[vchess.git] / client / src / variants / Atomic.js

diff --git a/client/src/variants/Atomic.js b/client/src/variants/Atomic.js
index 996f2d1..9675c58 100644 (file)
--- a/client/src/variants/Atomic.js
+++ b/client/src/variants/Atomic.js
@@ -1,14 +1,14 @@
 import { ChessRules, PiPo } from "@/base_rules";
 
-export const VariantRules = class AtomicRules extends ChessRules {
+export class AtomicRules extends ChessRules {
   getPotentialMovesFrom([x, y]) {
     let moves = super.getPotentialMovesFrom([x, y]);
 
     // Handle explosions
     moves.forEach(m => {
+      // NOTE: if vanish.length==2 and appear.length==2, this is castle
       if (m.vanish.length > 1 && m.appear.length <= 1) {
-        //avoid castles
-        // Explosion! OPTION (TODO?): drop moves which explode our king here
+        // Explosion! (TODO?: drop moves which explode our king here)
         let steps = [
           [-1, -1],
           [-1, 0],
@@ -58,25 +58,28 @@ export const VariantRules = class AtomicRules extends ChessRules {
     return moves.concat(this.getCastleMoves([x, y]));
   }
 
-  isAttacked(sq, colors) {
+  isAttacked(sq, color) {
     if (
       this.getPiece(sq[0], sq[1]) == V.KING &&
-      this.isAttackedByKing(sq, colors)
-    )
-      return false; //king cannot take...
+      this.isAttackedByKing(sq, color)
+    ) {
+      // A king next to the enemy king is immune to attacks
+      return false;
+    }
     return (
-      this.isAttackedByPawn(sq, colors) ||
-      this.isAttackedByRook(sq, colors) ||
-      this.isAttackedByKnight(sq, colors) ||
-      this.isAttackedByBishop(sq, colors) ||
-      this.isAttackedByQueen(sq, colors)
+      this.isAttackedByPawn(sq, color) ||
+      this.isAttackedByRook(sq, color) ||
+      this.isAttackedByKnight(sq, color) ||
+      this.isAttackedByBishop(sq, color) ||
+      this.isAttackedByQueen(sq, color)
+      // No "attackedByKing": it cannot take
     );
   }
 
-  updateVariables(move) {
-    super.updateVariables(move);
+  postPlay(move) {
+    super.postPlay(move);
     if (move.appear.length == 0) {
-      //capture
+      // Capture
       const firstRank = { w: 7, b: 0 };
       for (let c of ["w", "b"]) {
         // Did we explode king of color c ? (TODO: remove move earlier)
@@ -85,29 +88,25 @@ export const VariantRules = class AtomicRules extends ChessRules {
           Math.abs(this.kingPos[c][1] - move.end.y) <= 1
         ) {
           this.kingPos[c] = [-1, -1];
-          this.castleFlags[c] = [false, false];
+          this.castleFlags[c] = [8, 8];
         } else {
           // Now check if init rook(s) exploded
           if (Math.abs(move.end.x - firstRank[c]) <= 1) {
-            if (Math.abs(move.end.y - this.INIT_COL_ROOK[c][0]) <= 1)
-              this.castleFlags[c][0] = false;
-            if (Math.abs(move.end.y - this.INIT_COL_ROOK[c][1]) <= 1)
-              this.castleFlags[c][1] = false;
+            if (Math.abs(move.end.y - this.castleFlags[c][0]) <= 1)
+              this.castleFlags[c][0] = 8;
+            if (Math.abs(move.end.y - this.castleFlags[c][1]) <= 1)
+              this.castleFlags[c][1] = 8;
           }
         }
       }
     }
   }
 
-  unupdateVariables(move) {
-    super.unupdateVariables(move);
-    const c = move.vanish[0].c;
+  postUndo(move) {
+    super.postUndo(move);
+    const c = this.turn;
     const oppCol = V.GetOppCol(c);
-    if (
-      [this.kingPos[c][0], this.kingPos[oppCol][0]].some(e => {
-        return e < 0;
-      })
-    ) {
+    if ([this.kingPos[c][0], this.kingPos[oppCol][0]].some(e => e < 0)) {
       // There is a chance that last move blowed some king away..
       for (let psq of move.vanish) {
         if (psq.p == "k")
@@ -124,15 +123,16 @@ export const VariantRules = class AtomicRules extends ChessRules {
     // If opponent king disappeared, move is valid
     else if (this.kingPos[oppCol][0] < 0) res = false;
     // Otherwise, if we remain under check, move is not valid
-    else res = this.isAttacked(this.kingPos[color], [oppCol]);
+    else res = this.isAttacked(this.kingPos[color], oppCol);
     return res;
   }
 
-  getCheckSquares(color) {
+  getCheckSquares() {
+    const color = this.turn;
     let res = [];
     if (
       this.kingPos[color][0] >= 0 && //king might have exploded
-      this.isAttacked(this.kingPos[color], [V.GetOppCol(color)])
+      this.isAttacked(this.kingPos[color], V.GetOppCol(color))
     ) {
       res = [JSON.parse(JSON.stringify(this.kingPos[color]))];
     }
@@ -143,12 +143,10 @@ export const VariantRules = class AtomicRules extends ChessRules {
     const color = this.turn;
     const kp = this.kingPos[color];
     if (kp[0] < 0)
-      //king disappeared
+      // King disappeared
       return color == "w" ? "0-1" : "1-0";
-    if (this.atLeastOneMove())
-      // game not over
-      return "*";
-    if (!this.isAttacked(kp, [V.GetOppCol(color)])) return "1/2";
+    if (this.atLeastOneMove()) return "*";
+    if (!this.isAttacked(kp, V.GetOppCol(color))) return "1/2";
     return color == "w" ? "0-1" : "1-0"; //checkmate
   }
 };