X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FAntiking.js;h=b22cbd75a62d60f2b5f7e9794a1ffd534e3e127b;hb=c148615e9e7296869f95895ef434fd8371d637c2;hp=360deafa4002de7bea625608f3feb6d84ba2be81;hpb=46302e643947a66a5593a8eb1140d314effcea95;p=vchess.git

diff --git a/public/javascripts/variants/Antiking.js b/public/javascripts/variants/Antiking.js
index 360deafa..b22cbd75 100644
--- a/public/javascripts/variants/Antiking.js
+++ b/public/javascripts/variants/Antiking.js
@@ -1,4 +1,4 @@
-class AntikingRules
+class AntikingRules extends ChessRules
 {
 	// Path to pieces
 	static getPpath(b)
@@ -11,30 +11,57 @@ class AntikingRules
 	initVariables(fen)
 	{
 		super.initVariables(fen);
-		// TODO: initialize this.antikingPos[...]
+		this.antikingPos = {'w':[-1,-1], 'b':[-1,-1]};
+		const position = fen.split(" ")[0].split("/");
+		for (let i=0; i<position.length; i++)
+		{
+			let k = 0;
+			for (let j=0; j<position[i].length; j++)
+			{
+				switch (position[i].charAt(j))
+				{
+					case 'a':
+						this.antikingPos['b'] = [i,k];
+						break;
+					case 'A':
+						this.antikingPos['w'] = [i,k];
+						break;
+					default:
+						let num = parseInt(position[i].charAt(j));
+						if (!isNaN(num))
+							k += (num-1);
+				}
+				k++;
+			}
+		}
 	}
 
-	canTake(color1, color2, [x,y])
+	canTake([x1,y1], [x2,y2])
 	{
-		const piece = this.getPiece(x,y);
-		return (piece != "a" && color1 != color2) || (piece == "a" && color1 == color2);
+		const piece1 = this.getPiece(x1,y1);
+		const piece2 = this.getPiece(x2,y2);
+		const color1 = this.getColor(x1,y1);
+		const color2 = this.getColor(x2,y2);
+		return piece2 != "a" &&
+			((piece1 != "a" && color1 != color2) || (piece1 == "a" && color1 == color2));
 	}
 
 	getPotentialMovesFrom([x,y])
 	{
-		let c = this.getColor(x,y);
 		switch (this.getPiece(x,y))
 		{
 			case VariantRules.ANTIKING:
-				return this.getPotentialAntikingMoves(x,y,c);
+				return this.getPotentialAntikingMoves([x,y]);
 			default:
-				return super.getPotentielMovesFrom([x,y]);
+				return super.getPotentialMovesFrom([x,y]);
 		}
 	}
 
-	getPotentialAntikingMoves([x,y])
+	getPotentialAntikingMoves(sq)
 	{
-		// TODO
+		const V = VariantRules;
+		return this.getSlideNJumpMoves(sq,
+			V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
 	}
 
 	isAttacked(sq, colors)
@@ -42,49 +69,76 @@ class AntikingRules
 		return (super.isAttacked(sq, colors) || this.isAttackedByAntiking(sq, colors));
 	}
 
-	isAttackedByAntiking(sq, color)
+	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,
+			V.steps[V.ROOK].concat(V.steps[V.BISHOP]), "oneStep");
+	}
+
+	isAttackedByAntiking([x,y], colors)
 	{
-		// TODO
+		const V = VariantRules;
+		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");
 	}
 
 	underCheck(move)
 	{
 		const c = this.turn;
-		this.play(move);
-		let res = this.isAttacked(this.kingPos[c], this.getOppCol(c));
-		// TODO: also check that antiking is still in check
+		const oppCol = this.getOppCol(c);
+		this.play(move)
+		let res = this.isAttacked(this.kingPos[c], [oppCol])
+			|| !this.isAttacked(this.antikingPos[c], [oppCol]);
 		this.undo(move);
 		return res;
 	}
 
 	getCheckSquares(move)
 	{
+		let res = super.getCheckSquares(move);
 		this.play(move);
 		const c = this.turn;
-		// TODO
-		let res = this.isAttacked(this.kingPos[c], this.getOppCol(c))
-			? [ JSON.parse(JSON.stringify(this.kingPos[c])) ]
-			: [ ];
+		if (!this.isAttacked(this.antikingPos[c], [this.getOppCol(c)]))
+			res.push(JSON.parse(JSON.stringify(this.antikingPos[c])));
 		this.undo(move);
 		return res;
 	}
 
-	// TODO: need antikingPos as well
 	updateVariables(move)
 	{
-		// ...
+		super.updateVariables(move);
+		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)
+		{
+			this.antikingPos[c][0] = move.appear[0].x;
+			this.antikingPos[c][1] = move.appear[0].y;
+		}
 	}
 
 	unupdateVariables(move)
 	{
-		// TODO
+		super.unupdateVariables(move);
+		const c = this.getColor(move.start.x,move.start.y);
+		if (this.getPiece(move.start.x,move.start.y) == VariantRules.ANTIKING)
+			this.antikingPos[c] = [move.start.x, move.start.y];
 	}
 
-	checkGameEnd(color)
+	checkGameEnd()
 	{
-		// TODO
-		if (!this.isAttacked(this.kingPos[color], this.getOppCol(color)))
+		const color = this.turn;
+		const oppCol = this.getOppCol(color);
+		if (!this.isAttacked(this.kingPos[color], [oppCol])
+			&& this.isAttacked(this.antikingPos[color], [oppCol]))
+		{
 			return "1/2";
+		}
 		return color == "w" ? "0-1" : "1-0";
 	}
 
@@ -103,8 +157,56 @@ class AntikingRules
 
 	static GenRandInitFen()
 	{
-		let randFen = ChessRules.GenRandInitFen();
-		// TODO: just add an antiking at random on 3rd ranks
-		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"; //add flags
+		return fen;
 	}
 }