Several small improvements + integrate options + first working draft of Cwda

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

diff --git a/client/src/variants/Hiddenqueen.js b/client/src/variants/Hiddenqueen.js
index 8db5a50..1ce85be 100644 (file)
--- a/client/src/variants/Hiddenqueen.js
+++ b/client/src/variants/Hiddenqueen.js
@@ -3,6 +3,7 @@ import { ArrayFun } from "@/utils/array";
 import { randInt } from "@/utils/alea";
 
 export class HiddenqueenRules extends ChessRules {
+
   // Analyse in Hiddenqueen mode makes no sense
   static get CanAnalyze() {
     return false;
@@ -12,8 +13,12 @@ export class HiddenqueenRules extends ChessRules {
     return 't';
   }
 
+  static get SomeHiddenMoves() {
+    return true;
+  }
+
   static get PIECES() {
-    return ChessRules.PIECES.concat(Object.values(V.HIDDEN_CODE));
+    return ChessRules.PIECES.concat([V.HIDDEN_QUEEN]);
   }
 
   getPiece(i, j) {
@@ -38,6 +43,31 @@ export class HiddenqueenRules extends ChessRules {
     return b;
   }
 
+  getEpSquare(moveOrSquare) {
+    if (!moveOrSquare) return undefined;
+    if (typeof moveOrSquare === "string") {
+      const square = moveOrSquare;
+      if (square == "-") return undefined;
+      return V.SquareToCoords(square);
+    }
+    const move = moveOrSquare;
+    const s = move.start,
+          e = move.end;
+    const color = move.vanish[0].c;
+    if (
+      s.y == e.y &&
+      Math.abs(s.x - e.x) == 2 &&
+      ((color == 'w' && s.x == 6) || (color == 'b' && s.x == 1)) &&
+      [V.PAWN, V.HIDDEN_QUEEN].includes(move.vanish[0].p)
+    ) {
+      return {
+        x: (s.x + e.x) / 2,
+        y: s.y
+      };
+    }
+    return undefined; //default
+  }
+
   isValidPawnMove(move) {
     const color = move.vanish[0].c;
     const pawnShift = color == "w" ? -1 : 1;
@@ -87,6 +117,27 @@ export class HiddenqueenRules extends ChessRules {
     return super.getPotentialMovesFrom([x, y]);
   }
 
+  getEnpassantCaptures([x, y], shiftX) {
+    const Lep = this.epSquares.length;
+    const epSquare = this.epSquares[Lep - 1];
+    let enpassantMove = null;
+    if (
+      !!epSquare &&
+      epSquare.x == x + shiftX &&
+      Math.abs(epSquare.y - y) == 1
+    ) {
+      enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]);
+      enpassantMove.vanish.push({
+        x: x,
+        y: epSquare.y,
+        // Captured piece may be a hidden queen
+        p: this.board[x][epSquare.y][1],
+        c: this.getColor(x, epSquare.y)
+      });
+    }
+    return !!enpassantMove ? [enpassantMove] : [];
+  }
+
   getPotentialPawnMoves([x, y]) {
     const piece = this.getPiece(x, y);
     const promotions =
@@ -101,8 +152,8 @@ export class HiddenqueenRules extends ChessRules {
     return this.filterValid(this.getPotentialMovesFrom(sq));
   }
 
-  static GenRandInitFen(randomness) {
-    let fen = ChessRules.GenRandInitFen(randomness);
+  static GenRandInitFen(options) {
+    let fen = ChessRules.GenRandInitFen(options);
     // Place hidden queens at random (always):
     let hiddenQueenPos = randInt(8);
     let pawnRank = "PPPPPPPP".split("");
@@ -130,12 +181,21 @@ export class HiddenqueenRules extends ChessRules {
       this.kingPos[oppCol] = [move.vanish[1].x, move.vanish[1].y];
   }
 
+  underCheck(color) {
+    if (this.kingPos[color][0] < 0) return false;
+    return super.underCheck(color);
+  }
+
   getCurrentScore() {
     const color = this.turn;
     if (this.kingPos[color][0] < 0)
       // King disappeared
-      return color == "w" ? "0-1" : "1-0";
-    return super.getCurrentScore();
+      return (color == "w" ? "0-1" : "1-0");
+    const oldSide = this.side;
+    this.side = color;
+    const res = super.getCurrentScore();
+    this.side = oldSide;
+    return res;
   }
 
   // Search is biased, so not really needed to explore deeply
@@ -156,10 +216,24 @@ export class HiddenqueenRules extends ChessRules {
   }
 
   getNotation(move) {
-    const notation = super.getNotation(move);
-    if (notation.charAt(0) == 'T')
-      // Do not reveal hidden queens
-      return notation.substr(1);
+    // Not using getPiece() method because it would transform HQ into pawn:
+    if (this.board[move.start.x][move.start.y].charAt(1) != V.HIDDEN_QUEEN)
+      return super.getNotation(move);
+    const finalSquare = V.CoordsToSquare(move.end);
+    if (move.appear[0].p == V.QUEEN) {
+      return (
+        "Q" +
+        (move.vanish.length > move.appear.length ? "x" : "") +
+        finalSquare
+      );
+    }
+    // Do not reveal hidden queens playing as pawns
+    let notation = "";
+    if (move.vanish.length == 2)
+      // Capture
+      notation = V.CoordToColumn(move.start.y) + "x" + finalSquare;
+    else notation = finalSquare;
     return notation;
   }
+
 };