X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=public%2Fjavascripts%2Fvariants%2FDark.js;fp=public%2Fjavascripts%2Fvariants%2FDark.js;h=0000000000000000000000000000000000000000;hb=625022fdcf750f0aff8fcd699f7e9b89730e1d10;hp=3879d9dfa8cc18a22d957e16f28064c8af4f216f;hpb=b955c65b942d09d24b5c3bed0d755d4f2f8f71f1;p=vchess.git

diff --git a/public/javascripts/variants/Dark.js b/public/javascripts/variants/Dark.js
deleted file mode 100644
index 3879d9df..00000000
--- a/public/javascripts/variants/Dark.js
+++ /dev/null
@@ -1,287 +0,0 @@
-class DarkRules extends ChessRules
-{
-	// Standard rules, in the shadow
-	setOtherVariables(fen)
-	{
-		super.setOtherVariables(fen);
-		const [sizeX,sizeY] = [V.size.x,V.size.y];
-		this.enlightened = {
-			"w": doubleArray(sizeX,sizeY),
-			"b": doubleArray(sizeX,sizeY)
-		};
-		// Setup enlightened: squares reachable by each side
-		// (TODO: one side would be enough ?)
-		this.updateEnlightened();
-	}
-
-	updateEnlightened()
-	{
-		for (let i=0; i<V.size.x; i++)
-		{
-			for (let j=0; j<V.size.y; j++)
-			{
-				this.enlightened["w"][i][j] = false;
-				this.enlightened["b"][i][j] = false;
-			}
-		}
-		const pawnShift = {"w":-1, "b":1};
-		// Initialize with pieces positions (which are seen)
-		for (let i=0; i<V.size.x; i++)
-		{
-			for (let j=0; j<V.size.y; j++)
-			{
-				if (this.board[i][j] != V.EMPTY)
-				{
-					const color = this.getColor(i,j);
-					this.enlightened[color][i][j] = true;
-					// Add potential squares visible by "impossible pawn capture"
-					if (this.getPiece(i,j) == V.PAWN)
-					{
-						for (let shiftY of [-1,1])
-						{
-							if (V.OnBoard(i+pawnShift[color],j+shiftY)
-								&& this.board[i+pawnShift[color]][j+shiftY] == V.EMPTY)
-							{
-								this.enlightened[color][i+pawnShift[color]][j+shiftY] = true;
-							}
-						}
-					}
-				}
-			}
-		}
-		const currentTurn = this.turn;
-		this.turn = "w";
-		const movesWhite = this.getAllValidMoves();
-		this.turn = "b";
-		const movesBlack = this.getAllValidMoves();
-		this.turn = currentTurn;
-		for (let move of movesWhite)
-			this.enlightened["w"][move.end.x][move.end.y] = true;
-		for (let move of movesBlack)
-			this.enlightened["b"][move.end.x][move.end.y] = true;
-	}
-
-	// Has to be redefined to avoid an infinite loop
-	getAllValidMoves()
-	{
-		const color = this.turn;
-		const oppCol = V.GetOppCol(color);
-		let potentialMoves = [];
-		for (let i=0; i<V.size.x; i++)
-		{
-			for (let j=0; j<V.size.y; j++)
-			{
-				if (this.board[i][j] != V.EMPTY && this.getColor(i,j) == color)
-					Array.prototype.push.apply(potentialMoves, this.getPotentialMovesFrom([i,j]));
-			}
-		}
-		return potentialMoves; //because there are no checks
-	}
-
-	atLeastOneMove()
-	{
-		if (this.kingPos[this.turn][0] < 0)
-			return false;
-		return true; //TODO: is it right?
-	}
-
-	underCheck(color)
-	{
-		return false; //there is no check
-	}
-
-	getCheckSquares(color)
-	{
-		return [];
-	}
-
-	updateVariables(move)
-	{
-		super.updateVariables(move);
-		if (move.vanish.length >= 2 && move.vanish[1].p == V.KING)
-		{
-			// We took opponent king !
-			this.kingPos[this.turn] = [-1,-1];
-		}
-
-		// Update moves for both colors:
-		this.updateEnlightened();
-	}
-
-	unupdateVariables(move)
-	{
-		super.unupdateVariables(move);
-		const c = move.vanish[0].c;
-		const oppCol = V.GetOppCol(c);
-		if (this.kingPos[oppCol][0] < 0)
-		{
-			// Last move took opponent's king
-			for (let psq of move.vanish)
-			{
-				if (psq.p == 'k')
-				{
-					this.kingPos[oppCol] = [psq.x, psq.y];
-					break;
-				}
-			}
-		}
-
-		// Update moves for both colors:
-		this.updateEnlightened();
-	}
-
-	checkGameEnd()
-	{
-		// No valid move: our king disappeared
-		return this.turn == "w" ? "0-1" : "1-0";
-	}
-
-	static get THRESHOLD_MATE()
-	{
-		return 500; //checkmates evals may be slightly below 1000
-	}
-
-	// In this special situation, we just look 1 half move ahead
-	getComputerMove()
-	{
-		const maxeval = V.INFINITY;
-		const color = this.turn;
-		const oppCol = V.GetOppCol(color);
-		const pawnShift = (color == "w" ? -1 : 1);
-		const kp = this.kingPos[color];
-
-		// Do not cheat: the current enlightment is all we can see
-		const myLight = JSON.parse(JSON.stringify(this.enlightened[color]));
-
-		// Can a slider on (i,j) apparently take my king?
-		// NOTE: inaccurate because assume yes if some squares are shadowed
-		const sliderTake = ([i,j], piece) => {
-			let step = undefined;
-			if (piece == V.BISHOP)
-			{
-				if (Math.abs(kp[0] - i) == Math.abs(kp[1] - j))
-				{
-					step =
-					[
-						(i-kp[0]) / Math.abs(i-kp[0]),
-						(j-kp[1]) / Math.abs(j-kp[1])
-					];
-				}
-			}
-			else if (piece == V.ROOK)
-			{
-				if (kp[0] == i)
-					step = [0, (j-kp[1]) / Math.abs(j-kp[1])];
-				else if (kp[1] == j)
-					step = [(i-kp[0]) / Math.abs(i-kp[0]), 0];
-			}
-			if (!step)
-				return false;
-			// Check for obstacles
-			let obstacle = false;
-			for (
-				let x=kp[0]+step[0], y=kp[1]+step[1];
-				x != i && y != j;
-				x += step[0], y+= step[1])
-			{
-				if (myLight[x][y] && this.board[x][y] != V.EMPTY)
-				{
-					obstacle = true;
-					break;
-				}
-			}
-			if (!obstacle)
-				return true;
-			return false;
-		};
-
-		// Do I see something which can take my king ?
-		const kingThreats = () => {
-			for (let i=0; i<V.size.x; i++)
-			{
-				for (let j=0; j<V.size.y; j++)
-				{
-					if (myLight[i][j] && this.board[i][j] != V.EMPTY
-						&& this.getColor(i,j) != color)
-					{
-						switch (this.getPiece(i,j))
-						{
-							case V.PAWN:
-								if (kp[0] + pawnShift == i && Math.abs(kp[1]-j) == 1)
-									return true;
-								break;
-							case V.KNIGHT:
-								if ((Math.abs(kp[0] - i) == 2 && Math.abs(kp[1] - j) == 1) ||
-									(Math.abs(kp[0] - i) == 1 && Math.abs(kp[1] - j) == 2))
-								{
-									return true;
-								}
-								break;
-							case V.KING:
-								if (Math.abs(kp[0] - i) == 1 && Math.abs(kp[1] - j) == 1)
-									return true;
-								break;
-							case V.BISHOP:
-								if (sliderTake([i,j], V.BISHOP))
-									return true;
-								break;
-							case V.ROOK:
-								if (sliderTake([i,j], V.ROOK))
-									return true;
-								break;
-							case V.QUEEN:
-								if (sliderTake([i,j], V.BISHOP) || sliderTake([i,j], V.ROOK))
-									return true;
-								break;
-						}
-					}
-				}
-			}
-			return false;
-		};
-
-		let moves = this.getAllValidMoves();
-		for (let move of moves)
-		{
-			this.play(move);
-			if (this.kingPos[oppCol][0] >= 0 && kingThreats())
-			{
-				// We didn't take opponent king, and our king will be captured: bad
-				move.eval = -maxeval;
-			}
-			this.undo(move);
-			if (!!move.eval)
-				continue;
-
-			move.eval = 0; //a priori...
-
-			// Can I take something ? If yes, do it if it seems good...
-			if (move.vanish.length == 2 && move.vanish[1].c != color) //avoid castle
-			{
-				const myPieceVal = V.VALUES[move.appear[0].p];
-				const hisPieceVal = V.VALUES[move.vanish[1].p];
-				if (myPieceVal <= hisPieceVal)
-					move.eval = hisPieceVal - myPieceVal + 2; //favor captures
-				else
-				{
-					// Taking a pawn with minor piece,
-					// or minor piece or pawn with a rook,
-					// or anything but a queen with a queen,
-					// or anything with a king.
-					// ==> Do it at random, although
-					//     this is clearly inferior to what a human can deduce...
-					move.eval = (Math.random() < 0.5 ? 1 : -1);
-				}
-			}
-		}
-
-		// TODO: also need to implement the case when an opponent piece (in light)
-		// is threatening something - maybe not the king, but e.g. pawn takes rook.
-
-		moves.sort((a,b) => b.eval - a.eval);
-		let candidates = [0];
-		for (let j=1; j<moves.length && moves[j].eval == moves[0].eval; j++)
-			candidates.push(j);
-		return moves[_.sample(candidates, 1)];
-	}
-}