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Title	Chess (WIP)
ID	5022648828428288
Created	12 years ago, 1388466475991
Updated	5 years ago, 1591669352862
Code	/** * Made by Tom. * Second attempt at making a chess game. Because I felt like it. * * This time I will use min-max algorithm for computer moves, * unlike my previous attempt which was a complete mess. * * Do not expect any major computer difficulty improvements for * this version (compared to my first attempt). * * Feel free to tell me any missing TODO item or bugs you have found. / / TODO [in no particular order] * - Add icons for each chess piece (instead of numbers). * - Add black coloring to the chess board. * - Add knights' moveset. * - Prevent kings to move in danger zones. * - Add castling move for kings. * - Add check state. * - Add checkmate verification. * - Add draw verification. * - Add pawns' diagonal piece capture. * - Add 'En Passant' move for pawns. * - Add computer. * - Add ability to undo. * * [Low Priority] * - Add pawn enhancements (to queen, bishop, rook) * - Add menu with options * - Starting team (white or black) * - Team shown at top of board (white or black) * - User selection (Player or Computer) * * [Very Low Priority] * - Game Modes * - Transcendental * - 50-move rule * * [Once Goal Reached] * - Recreate program for visibility. */ / * Features * - Basic chess functionality. * - Boring. */ var Piece = { Empty : 0, Pawn : 1, Bishop : 2, Knight : 3, Rook : 4, Queen : 5, King : 6 }; var Team = { White : 1, Black : 2, None : 0 }; var Chess = function(start_team, top_team) { this.size = 8; // This should always remain as 8. this.grid = []; this.top_team = top_team; this.bottom_team = top_team === Team.White ? Team.Black : Team.White; this.playing_team = start_team; this.opposite_team = start_team === Team.White ? Team.Black : Team.White; // Used for AI movement tracking. this.thoughts_ahead = 0; // Initialize chess board as all empty. for (var row = 0; row < this.size; row++) { this.grid.push([]); for (var col = 0; col < this.size; col++) { this.grid[row].push(Piece.Empty); } } }; Chess.prototype.clone = function() { var cloned = new Chess(this.start_team, this.top_team); for (var row = 0; row < this.grid.length; row++) { for (var col = 0; col < this.grid[row].length; col++) { cloned.grid[row][col] = this.grid[row][col]; } } cloned.playing_team = this.playing_team; cloned.opposite_team = this.opposite_team; cloned.thoughts_ahead = this.thoughts_ahead; return cloned; }; Chess.prototype.initialize = function() { var side_pieces = [Piece.Rook, Piece.Knight, Piece.Bishop, Piece.Queen, Piece.King, Piece.Bishop, Piece.Knight, Piece.Rook]; // Set up initial pieces of the board. for (var col = 0; col < this.size; col++) { this.setPiece(col, 0, side_pieces[col], this.top_team); this.setPiece(col, 1, Piece.Pawn, this.top_team); this.setPiece(col, this.size - 1, side_pieces[col], this.bottom_team); this.setPiece(col, this.size - 2, Piece.Pawn, this.bottom_team); } }; Chess.prototype.isValidPosition = function(col, row) { return !(col < 0 \|\| col >= this.size \|\| row < 0 \|\| row >= this.size); }; Chess.prototype.getPieceAt = function(col, row) { return this.grid[row][col] & 0xF; }; Chess.prototype.getPieceStringOf = function(piece, team) { switch (piece) { case Piece.Empty: return ""; case Piece.Pawn: return team === Team.White ? "♙" : "♟"; case Piece.Rook: return team === Team.White ? "♖" : "♜"; case Piece.Knight: return team === Team.White ? "♘" : "♞"; case Piece.Bishop: return team === Team.White ? "♗" : "♝"; case Piece.Queen: return team === Team.White ? "♕" : "♛"; case Piece.King: return team === Team.White ? "♔" : "♚"; default: return "?"; } return piece \| (team << 3); }; Chess.prototype.getTeamAt = function(col, row) { return this.grid[row][col] >> 4; }; Chess.prototype.getMovesetIf = function(col, row, piece, team, max_range) { var moveset = []; switch (piece) { case Piece.Empty: break; case Piece.Pawn: var forward = this.top_team === team ? 1 : -1; var range = this.top_team === team && row === 1 \|\| this.bottom_team === team && row === 6 ? 2 : 1; // Basic pawn movement. for (var i = 1; i <= min(range, max_range); i++) { if (this.isValidPosition(col, row + forward i)) { if (this.getTeamAt(col, row + forward * i) === Team.None) { moveset.push([col, row, col, row + forward * i]); } else { break; } } } // TODO: pawn attack // TODO: pawn enhancement // TODO: pawn attack #2 break; case Piece.Knight: // TODO: knight movement break; case Piece.Bishop: // Bishop movement var nw = true, ne = true, se = true, sw = true; for (var i = 1; i <= min(this.size, max_range) - 1; i++) { if (nw && this.isValidPosition(col - i, row - i)) { var t = this.getTeamAt(col - i, row - i); nw = t === Team.None; if (nw \|\| t === this.opposite_team) { moveset.push([col, row, col - i, row - i]); } } if (ne && this.isValidPosition(col + i, row - i)) { var t = this.getTeamAt(col + i, row - i); ne = t === Team.None; if (ne \|\| t === this.opposite_team) { moveset.push([col, row, col + i, row - i]); } } if (se && this.isValidPosition(col + i, row + i)) { var t = this.getTeamAt(col + i, row + i); se = t === Team.None; if (se \|\| t === this.opposite_team) { moveset.push([col, row, col + i, row + i]); } } if (sw && this.isValidPosition(col - i, row + i)) { var t = this.getTeamAt(col - i, row + i); sw = t === Team.None; if (sw \|\| t === this.opposite_team) { moveset.push([col, row, col - i, row + i]); } } } break; case Piece.Rook: // Rook movement var top = true, _right = true, bottom = true, left = true; for (var i = 1; i <= min(this.size, max_range) - 1; i++) { if (_right && this.isValidPosition(col + i, row)) { var t = this.getTeamAt(col + i, row); _right = t === Team.None; if (_right \|\| t === this.opposite_team) { moveset.push([col, row, col + i, row]); } } if (left && this.isValidPosition(col - i, row)) { var t = this.getTeamAt(col - i, row); left = t === Team.None; if (left \|\| t === this.opposite_team) { moveset.push([col, row, col - i, row]); } } if (bottom && this.isValidPosition(col, row + i)) { var t = this.getTeamAt(col, row + i); bottom = t === Team.None; if (bottom \|\| t === this.opposite_team) { moveset.push([col, row, col, row + i]); } } if (top && this.isValidPosition(col, row - i)) { var t = this.getTeamAt(col, row - i); top = t === Team.None; if (top \|\| t === this.opposite_team) { moveset.push([col, row, col, row - i]); } } } break; case Piece.Queen: var rook = this.getMovesetIf(col, row, Piece.Rook, team, this.size); var bishop = this.getMovesetIf(col, row, Piece.Bishop, team, this.size); moveset = rook.concat(bishop); break; case Piece.King: moveset = this.getMovesetIf(col, row, Piece.Queen, team, 1); // TODO: en passant // TODO: remove danger slots. break; } return moveset; }; Chess.prototype.getMoveset = function(col, row) { if (!this.isValidPosition(col, row)) { return []; } var piece = this.getPieceAt(col, row); var team = this.getTeamAt(col, row); return this.getMovesetIf(col, row, piece, team, this.size); }; Chess.prototype.move = function(fromCol, fromRow, toCol, toRow) { // Validate move. var moveset = this.getMoveset(fromCol, fromRow); var valid = false; for (var m = 0; m < moveset.length; m++) { if (moveset[m][2] === toCol && moveset[m][3] === toRow) { valid = true; break; } } // Return null if this move is invalid. if (!valid) { return null; } // Return cloned chess board with the new move. var piece = this.getPieceAt(fromCol, fromRow); var team = this.getTeamAt(fromCol, fromRow); var cloned = this.clone(); cloned.setPiece(fromCol, fromRow, Piece.None, Team.None); cloned.setPiece(toCol, toRow, piece, team); return cloned; }; Chess.prototype.setPiece = function(col, row, piece, team) { if (this.isValidPosition(col, row)) { this.grid[row][col] = piece \| (team << 4); } }; Chess.prototype.draw = function(selected, selected_moveset) { background(255, 255, 255); var w = width / this.size \| 0; var h = height / this.size \| 0; if (selected !== null) { var row = selected / this.size \| 0; var col = selected % this.size \| 0; noStroke(); fill(225, 225, 225, 150); rect(w * col + 1, h * row + 1, w - 2, h - 2); fill(84, 150, 255, 150); for (var m = 0; m < selected_moveset.length; m++) { var move = selected_moveset[m]; rect(w * move[2] + 1, h * move[3] + 1, w - 2, h - 2); } } textAlign(CENTER, CENTER); fill(0, 0, 0); strokeWeight(2); stroke(0, 0, 0); textSize(45); for (var row = 0; row < this.size; row++) { var sy = h * row; var ey = h * (row + 1) - 1; var my = (sy + ey) / 2; for (var col = 0; col < this.size; col++) { var sx = w * col; var ex = w * (col + 1) - 1; var mx = (sx + ex) / 2; line(sx, sy, sx, ey); line(sx, sy, ex, sy); var piece = this.getPieceAt(col, row); var team = this.getTeamAt(col, row); var piece_string = this.getPieceStringOf(piece, team); text(piece_string, mx, my); } line(w * this.size, sy, w * this.size, ey); } for (var col = 0; col < this.size; col++) { line(w * col, h * this.size, w * (col + 1) - 1, h * this.size); } }; var chess = new Chess(Team.White, Team.Black); var selected = null; var selected_moveset = []; chess.initialize(); chess.draw(selected, selected_moveset); var mouseClicked = function() { var w = width / chess.size; var h = height / chess.size; var chessX = mouseX / w \| 0; var chessY = mouseY / h \| 0; if (selected !== null) { var moved = false; for (var m = 0; m < selected_moveset.length; m++) { if (selected_moveset[m][2] === chessX && selected_moveset[m][3] === chessY) { var move = selected_moveset[m]; chess = chess.move(move[0], move[1], move[2], move[3]); var playing_team = chess.playing_team; chess.playing_team = chess.opposite_team; chess.opposite_team = playing_team; } } selected = null; selected_moveset = []; chess.draw(selected, selected_moveset); return; } // Get information regarding that position on the chess board. var piece = chess.getPieceAt(chessX, chessY); var team = chess.getTeamAt(chessX, chessY); // Ignore blanks or opponent's pieces. if (team !== chess.playing_team) { return; } // Selecting and unselecting a piece. var new_selected = chessY * chess.size + chessX; selected = selected === new_selected ? null : new_selected; selected_moveset = chess.getMoveset(chessX, chessY); chess.draw(selected, selected_moveset); };
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIXCxIKU2NyYXRjaHBhZBiAgID6qIL2CAw
Votes	408
Spin-Offs	28
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	null
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	Toms
Author Name	Asinine
Author ID	kaid_624711993065089058009125
Author Profile Access	COACH

Archive Data

Added	10 months ago, 1739373424504
Updated	8 months ago, 1744828355189
Source Deleted	unknown