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

diff --git a/client/src/variants/Kinglet.js b/client/src/variants/Kinglet.js
new file mode 100644 (file)
index 0000000..38ca649
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+++ b/client/src/variants/Kinglet.js
@@ -0,0 +1,87 @@
+import { ChessRules } from "@/base_rules";
+import { SuicideRules } from "@/variants/Suicide";
+
+export class KingletRules extends ChessRules {
+  static get HasFlags() {
+    return false;
+  }
+
+  static get PawnSpecs() {
+    return Object.assign(
+      {},
+      ChessRules.PawnSpecs,
+      { promotions: [V.KING] }
+    );
+  }
+
+  static IsGoodPosition(position) {
+    if (position.length == 0) return false;
+    const rows = position.split("/");
+    if (rows.length != V.size.x) return false;
+    // Just check that at least one pawn of each color is there:
+    let pawns = { "w": 0, "b": 0 };
+    for (let row of rows) {
+      let sumElts = 0;
+      for (let i = 0; i < row.length; i++) {
+        const lowerRi = row[i].toLowerCase();
+        if (V.PIECES.includes(lowerRi)) {
+          if (lowerRi == 'p') pawns[row[i] == lowerRi ? "b" : "w"]++;
+          sumElts++;
+        } else {
+          const num = parseInt(row[i]);
+          if (isNaN(num)) return false;
+          sumElts += num;
+        }
+      }
+      if (sumElts != V.size.y) return false;
+    }
+    if (Object.values(pawns).some(v => v == 0)) return false;
+    return true;
+  }
+
+  scanKings() {}
+
+  filterValid(moves) {
+    return moves;
+  }
+
+  getCheckSquares() {
+    return [];
+  }
+
+  // No variables update because no royal king + no castling
+  prePlay() {}
+  postPlay() {}
+  preUndo() {}
+  postUndo() {}
+
+  getCurrentScore() {
+    const pawnRemain = {
+      'w': this.board.some(b =>
+        b.some(cell => cell[0] == 'w' && cell[1] == 'p')),
+      'b': this.board.some(b =>
+        b.some(cell => cell[0] == 'b' && cell[1] == 'p'))
+    }
+    if (!pawnRemain['w']) return "0-1";
+    if (!pawnRemain['b']) return "1-0";
+    if (this.atLeastOneMove()) return "*";
+    // Stalemate: draw
+    return "1/2";
+  }
+
+  static GenRandInitFen(randomness) {
+    return SuicideRules.GenRandInitFen(randomness);
+  }
+
+  static get VALUES() {
+    // TODO: no clue what correct values would be
+    return {
+      p: 5,
+      r: 4,
+      n: 3,
+      b: 3,
+      q: 7,
+      k: 4
+    };
+  }
+};