X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FAntiking.js;h=2821f3f5d9f4c8c2362b4533a0c0023973dd7751;hb=7931e479adf93c87771ded1892a0873af72ae46d;hp=f9084951de50e996e2d1858950843a955f6b2b02;hpb=a6abf094c35a26019e47fea21302c4be32ff030b;p=vchess.git

diff --git a/public/javascripts/variants/Antiking.js b/public/javascripts/variants/Antiking.js
index f9084951..2821f3f5 100644
--- a/public/javascripts/variants/Antiking.js
+++ b/public/javascripts/variants/Antiking.js
@@ -1,13 +1,16 @@
 class AntikingRules extends ChessRules
 {
-	// Path to pieces
 	static getPpath(b)
 	{
 		return b[1]=='a' ? "Antiking/"+b : b;
 	}
 
 	static get ANTIKING() { return 'a'; }
-	
+
+	static get PIECES() {
+		return ChessRules.PIECES.concat([V.ANTIKING]);
+	}
+
 	initVariables(fen)
 	{
 		super.initVariables(fen);
@@ -50,7 +53,7 @@ class AntikingRules extends ChessRules
 	{
 		switch (this.getPiece(x,y))
 		{
-			case VariantRules.ANTIKING:
+			case V.ANTIKING:
 				return this.getPotentialAntikingMoves([x,y]);
 			default:
 				return super.getPotentialMovesFrom([x,y]);
@@ -59,7 +62,6 @@ class AntikingRules extends ChessRules
 
 	getPotentialAntikingMoves(sq)
 	{
-		const V = VariantRules;
 		return this.getSlideNJumpMoves(sq,
 			V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
 	}
@@ -71,7 +73,6 @@ class AntikingRules extends ChessRules
 
 	isAttackedByKing([x,y], colors)
 	{
-		const V = VariantRules;
 		if (this.getPiece(x,y) == V.ANTIKING)
 			return false; //antiking is not attacked by king
 		return this.isAttackedBySlideNJump([x,y], colors, V.KING,
@@ -80,9 +81,8 @@ class AntikingRules extends ChessRules
 
 	isAttackedByAntiking([x,y], colors)
 	{
-		const V = VariantRules;
-		if (this.getPiece(x,y) == V.KING)
-			return false; //king is not attacked by antiking
+		if ([V.KING,V.ANTIKING].includes(this.getPiece(x,y)))
+			return false; //(anti)king is not attacked by antiking
 		return this.isAttackedBySlideNJump([x,y], colors, V.ANTIKING,
 			V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
 	}
@@ -115,7 +115,7 @@ class AntikingRules extends ChessRules
 		const piece = this.getPiece(move.start.x,move.start.y);
 		const c = this.getColor(move.start.x,move.start.y);
 		// Update antiking position
-		if (piece == VariantRules.ANTIKING)
+		if (piece == V.ANTIKING)
 		{
 			this.antikingPos[c][0] = move.appear[0].x;
 			this.antikingPos[c][1] = move.appear[0].y;
@@ -126,7 +126,7 @@ class AntikingRules extends ChessRules
 	{
 		super.unupdateVariables(move);
 		const c = this.getColor(move.start.x,move.start.y);
-		if (this.getPiece(move.start.x,move.start.y) == VariantRules.ANTIKING)
+		if (this.getPiece(move.start.x,move.start.y) == V.ANTIKING)
 			this.antikingPos[c] = [move.start.x, move.start.y];
 	}
 
@@ -142,30 +142,65 @@ class AntikingRules extends ChessRules
 		return color == "w" ? "0-1" : "1-0";
 	}
 
-	// Pieces values (TODO: use Object.assign() + ChessRules.VALUES ?)
 	static get VALUES() {
-		return {
-			'p': 1,
-			'r': 5,
-			'n': 3,
-			'b': 3,
-			'q': 9,
-			'k': 1000,
-			'a': 1000
-		};
+		return Object.assign(
+			ChessRules.VALUES,
+			{ 'a': 1000 }
+		);
 	}
 
 	static GenRandInitFen()
 	{
-		let randFen = ChessRules.GenRandInitFen();
-		// Black side
-		let antikingPos = _.random(7);
-		let ranks23 = "pppppppp/" + (antikingPos>0?antikingPos:"") + "A" + (antikingPos<7?7-antikingPos:"");
-		randFen = randFen.replace("pppppppp/8", ranks23);
-		// White side
-		antikingPos = _.random(7);
-		ranks23 = (antikingPos>0?antikingPos:"") + "a" + (antikingPos<7?7-antikingPos:"") + "/PPPPPPPP";
-		randFen = randFen.replace("8/PPPPPPPP", ranks23);
-		return randFen;
+		let pieces = { "w": new Array(8), "b": new Array(8) };
+		let antikingPos = { "w": -1, "b": -1 };
+		for (let c of ["w","b"])
+		{
+			let positions = _.range(8);
+
+			// Get random squares for bishops, but avoid corners; because,
+			// if an antiking blocks a cornered bishop, it can never be checkmated
+			let randIndex = 2 * _.random(1,3);
+			const bishop1Pos = positions[randIndex];
+			let randIndex_tmp = 2 * _.random(2) + 1;
+			const bishop2Pos = positions[randIndex_tmp];
+			positions.splice(Math.max(randIndex,randIndex_tmp), 1);
+			positions.splice(Math.min(randIndex,randIndex_tmp), 1);
+
+			randIndex = _.random(5);
+			const knight1Pos = positions[randIndex];
+			positions.splice(randIndex, 1);
+			randIndex = _.random(4);
+			const knight2Pos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			randIndex = _.random(3);
+			const queenPos = positions[randIndex];
+			positions.splice(randIndex, 1);
+
+			const rook1Pos = positions[0];
+			const kingPos = positions[1];
+			const rook2Pos = positions[2];
+
+			// Random squares for antikings
+			antikingPos[c] = _.random(7);
+
+			pieces[c][rook1Pos] = 'r';
+			pieces[c][knight1Pos] = 'n';
+			pieces[c][bishop1Pos] = 'b';
+			pieces[c][queenPos] = 'q';
+			pieces[c][kingPos] = 'k';
+			pieces[c][bishop2Pos] = 'b';
+			pieces[c][knight2Pos] = 'n';
+			pieces[c][rook2Pos] = 'r';
+		}
+		const ranks23_black = "pppppppp/" + (antikingPos["w"]>0?antikingPos["w"]:"")
+			+ "A" + (antikingPos["w"]<7?7-antikingPos["w"]:"");
+		const ranks23_white = (antikingPos["b"]>0?antikingPos["b"]:"") + "a"
+			+ (antikingPos["b"]<7?7-antikingPos["b"]:"") + "/PPPPPPPP";
+		let fen = pieces["b"].join("") + "/" + ranks23_black +
+			"/8/8/" +
+			ranks23_white + "/" + pieces["w"].join("").toUpperCase() +
+			" 1111";
+		return fen;
 	}
 }