Fix Eightpieces, add some simple variants, add a basic variants classification instea...

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

diff --git a/client/src/variants/Pawnsking.js b/client/src/variants/Pawnsking.js
new file mode 100644 (file)
index 0000000..76d03ef
--- /dev/null
+++ b/client/src/variants/Pawnsking.js
@@ -0,0 +1,56 @@
+import { ChessRules } from "@/base_rules";
+
+export class PawnskingRules extends ChessRules {
+  static get PawnSpecs() {
+    return Object.assign(
+      {},
+      ChessRules.PawnSpecs,
+      // The promotion piece doesn't matter, the game is won
+      { promotions: [V.QUEEN] }
+    );
+  }
+
+  static get HasFlags() {
+    return false;
+  }
+
+  static GenRandInitFen() {
+    return "4k3/pppppppp/8/8/8/8/PPPPPPPP/4K3 w 0 -";
+  }
+
+  filterValid(moves) {
+    return moves;
+  }
+
+  getCheckSquares() {
+    return [];
+  }
+
+  getCurrentScore() {
+    const color = this.turn;
+    if (this.kingPos[color][0] < 0) return (color == "w" ? "0-1" : "1-0");
+    const oppCol = V.GetOppCol(color);
+    const lastRank = (oppCol == 'w' ? 0 : 7);
+    if (this.board[lastRank].some(cell => cell[0] == oppCol))
+      // The opposing edge is reached!
+      return (oppCol == "w" ? "1-0" : "0-1");
+    if (this.atLeastOneMove()) return "*";
+    return "1/2";
+  }
+
+  postPlay(move) {
+    super.postPlay(move);
+    if (move.vanish.length == 2 && move.vanish[1].p == V.KING)
+      this.kingPos[this.turn] = [-1, -1];
+  }
+
+  postUndo(move) {
+    super.postUndo(move);
+    if (move.vanish.length == 2 && move.vanish[1].p == V.KING)
+      this.kingPos[move.vanish[1].c] = [move.vanish[1].x, move.vanish[1].y];
+  }
+
+  static get SEARCH_DEPTH() {
+    return 4;
+  }
+};