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+ "requires": {} }, "ajv": { "version": "6.12.6", @@ -331,9 +2304,9 @@ "dev": true }, "async": { - "version": "2.6.3", - "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz", - "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==", + "version": "2.6.4", + "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz", + "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==", "dev": true, "requires": { "lodash": "^4.17.14" @@ -1038,9 +3011,9 @@ } }, "minimist": { - "version": "1.2.5", - "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz", - "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==", + "version": "1.2.6", + "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.6.tgz", + "integrity": "sha512-Jsjnk4bw3YJqYzbdyBiNsPWHPfO++UGG749Cxs6peCu5Xg4nrena6OVxOYxrQTqww0Jmwt+Ref8rggumkTLz9Q==", "dev": true }, "mkdirp": { commit 8feb547a8d36cd2bddede01d748174febf72150c Author: alex Date: Wed Apr 20 18:04:12 2022 -0400 Improve SimplePiece getLegalmoves performance. diff --git a/.gitignore b/.gitignore index 0a8a33b..f1f738a 100755 --- a/.gitignore +++ b/.gitignore @@ -3,3 +3,4 @@ node_modules/ dist *:Zone.Identifier lib/img +vscode-profile-*.cpuprofile  diff --git a/core/perf/minimaxPerformance.ts b/core/perf/minimaxPerformance.ts index fe1a788..7f7fabb 100644 --- a/core/perf/minimaxPerformance.ts +++ b/core/perf/minimaxPerformance.ts @@ -1,4 +1,5 @@ import { minimaxAI } from "../ai/minimax"; +import { minimaxAlphaBetaAI } from "../ai/minimaxAB"; import MyopicMiniMax from "../ai/myopic_minimax"; import randomAI from "../ai/random"; import { BoardState, Player, Square } from "../models"; @@ -27,8 +28,8 @@ export function versus(runs: number) { }   -export function boardValue(strength: number, runs: number, board: BoardState, rules: RuleSet): [number, number, number] { - const cpu1 = new minimaxAI(strength); +export function boardValue(strength: number, runs: number, board: BoardState, rules: RuleSet, prune: boolean): [number, number, number] { + const cpu1 = prune ? new minimaxAlphaBetaAI(strength) : new minimaxAI(strength); const cpu2 = new MyopicMiniMax(new randomAI(), 0.5); let wins = 0, losses = 0, max_turns = 0; for (let index = 0; index < runs; index++) { @@ -43,12 +44,12 @@ export function boardValue(strength: number, runs: number, board: BoardState, ru return [wins, losses, max_turns]; }  -export function testBoards(dim: Square, boards: number, runs: number, pieces: number, strength: number, rules: RuleSet) { +export function testBoards(dim: Square, boards: number, runs: number, pieces: number, strength: number, rules: RuleSet, prune: boolean) { const board_wrs = []; for (let i = 0; i < boards; i++) { const board = generateBoard(dim, pieces, true); printBoard(board); - const [wins, losses, max_moves] = boardValue(strength, runs, board, rules); + const [wins, losses, max_moves] = boardValue(strength, runs, board, rules, prune); console.log("wins: %d, losses: %d, ties: %d, winrate: %f", wins, losses, runs - wins - losses, wins / runs); board_wrs.push([board, wins, losses, max_moves]); } @@ -57,7 +58,7 @@ export function testBoards(dim: Square, boards: number, runs: number, pieces: nu    -testBoards({ 'file': 2, 'rank': 9 }, 100, 50, 3, 4, new SimpleRuleSet()).forEach(([b, w, l, m]) => { +testBoards({ 'file': 2, 'rank': 9 }, 100, 50, 3, 4, new SimpleRuleSet(), true).forEach(([b, w, l, m]) => { printBoard(b as BoardState); console.log(w, l, m); });; diff --git a/core/rules/simplePieces.ts b/core/rules/simplePieces.ts index f8e0bb3..d95e8d0 100644 --- a/core/rules/simplePieces.ts +++ b/core/rules/simplePieces.ts @@ -1,5 +1,5 @@ import { boardToState } from "../game/conversions.js"; -import { nextPlayer } from "../game/gameModel.js"; +import { Game, nextPlayer } from "../game/gameModel.js"; import { PiecePosition, Square, Move, Player, PieceType, Rules, BoardState } from "../models.js"; import { GameBoard } from "../game/GameBoard"; import { blocked, enumeratePositions, pieceAtLocation } from "../utils.js"; @@ -17,9 +17,12 @@ export abstract class SimplePiece implements GamePiece { this.state.position = location; } abstract legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean; + potentialMoves(position: GameBoard): Square[] { + return enumeratePositions(position.boardDimensions); + }  getLegalMoves(considerCheck: boolean, position: GameBoard): Square[] { - return enumeratePositions(position.boardDimensions).filter(x => this.legalMove(x, considerCheck, position)); + return this.potentialMoves(position).filter(x => this.legalMove(x, considerCheck, position)); } locationToMove(to: Square): Move { return { "from": this.state.position, "to": to }; @@ -34,6 +37,10 @@ function emptyOrOpponent(position: GameBoard, location: Square, current_player: return pieceAtLocation(position, location)?.state.player !== current_player; }  +function onBoard(s: Square, boardDims: Square) { + return s.file >= 0 && s.file <= boardDims.file && s.rank >= 0 && s.rank <= boardDims.rank; +} + export function pieceToGamePiece(piece: PiecePosition): GamePiece { return piece.piece === PieceType.Bishop ? new SimpleBishop(piece.position, piece.player) : piece.piece === PieceType.King ? new SimpleKing(piece.position, piece.player) @@ -44,7 +51,22 @@ export function pieceToGamePiece(piece: PiecePosition): GamePiece { }  export class SimpleKing extends SimplePiece { - legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { + override potentialMoves(position: GameBoard): Square[] { + const pos = this.state.position; + const out = [ + { 'file': pos.file - 1, 'rank': pos.rank - 1 }, + { 'file': pos.file - 1, 'rank': pos.rank }, + { 'file': pos.file - 1, 'rank': pos.rank + 1 }, + { 'file': pos.file, 'rank': pos.rank - 1 }, + { 'file': pos.file, 'rank': pos.rank + 1 }, + { 'file': pos.file + 1, 'rank': pos.rank - 1 }, + { 'file': pos.file + 1, 'rank': pos.rank }, + { 'file': pos.file + 1, 'rank': pos.rank + 1 } + ]; + return out.filter(s => onBoard(s, position.boardDimensions)); + } + + override legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { return Math.abs(this.state.position.file - location.file) <= 1 && Math.abs(this.state.position.rank - location.rank) <= 1 && emptyOrOpponent(position, location, this.state.player) @@ -56,7 +78,21 @@ export class SimpleKing extends SimplePiece { }  export class SimpleKnight extends SimplePiece { - legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { + override potentialMoves(position: GameBoard): Square[] { + const pos = this.state.position; + const out = [ + { 'file': pos.file - 2, 'rank': pos.rank - 1 }, + { 'file': pos.file - 2, 'rank': pos.rank + 1 }, + { 'file': pos.file - 1, 'rank': pos.rank - 2 }, + { 'file': pos.file - 1, 'rank': pos.rank + 2 }, + { 'file': pos.file + 1, 'rank': pos.rank - 2 }, + { 'file': pos.file + 1, 'rank': pos.rank + 2 }, + { 'file': pos.file + 2, 'rank': pos.rank - 1 }, + { 'file': pos.file + 2, 'rank': pos.rank + 1 }, + ]; + return out.filter(s => onBoard(s, position.boardDimensions)); + } + override legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { return (Math.abs(this.state.position.file - location.file) === 2 && Math.abs(this.state.position.rank - location.rank) === 1 || Math.abs(this.state.position.file - location.file) === 1 && Math.abs(this.state.position.rank - location.rank) === 2) && emptyOrOpponent(position, location, this.state.player) @@ -68,7 +104,7 @@ export class SimpleKnight extends SimplePiece { }  export class SimpleBishop extends SimplePiece { - legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { + override legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { return (this.state.position.file - this.state.position.rank === location.file - location.rank || this.state.position.file + this.state.position.rank === location.file + location.rank) && emptyOrOpponent(position, location, this.state.player) @@ -81,7 +117,7 @@ export class SimpleBishop extends SimplePiece { }  export class SimpleQueen extends SimplePiece { - legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { + override legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { return (this.state.position.file - this.state.position.rank === location.file - location.rank || this.state.position.file + this.state.position.rank === location.file + location.rank || this.state.position.file === location.file || this.state.position.rank === location.rank) @@ -95,7 +131,7 @@ export class SimpleQueen extends SimplePiece { }  export class SimpleRook extends SimplePiece { - legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { + override legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { return (this.state.position.file === location.file || this.state.position.rank === location.rank) && emptyOrOpponent(position, location, this.state.player) && !blocked(boardToState(position), this.state.position, location) @@ -107,7 +143,19 @@ export class SimpleRook extends SimplePiece { }  export class SimplePawn extends SimplePiece { - legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { + override potentialMoves(position: GameBoard): Square[] { + const rankMult: -1 | 1 = this.state.player === Player.White ? 1 : -1; + const pos = this.state.position; + const out = [ + { 'file': pos.file, 'rank': pos.rank + rankMult }, + { 'file': pos.file, 'rank': pos.rank + rankMult * 2 }, + { 'file': pos.file - 1, 'rank': pos.rank + rankMult }, + { 'file': pos.file + 1, 'rank': pos.rank + rankMult }, + ]; + return out.filter(s => onBoard(s, position.boardDimensions)); + } + + override legalMove(location: Square, considerCheck: boolean, position: GameBoard): boolean { const rankMult: -1 | 1 = this.state.player === Player.White ? 1 : -1; const twoMoveRank = this.state.player === Player.White ? 1 : position.boardDimensions.rank - 2; const curPos: Square = this.state.position; diff --git a/core/utils.ts b/core/utils.ts index 875eca0..7023a3d 100755 --- a/core/utils.ts +++ b/core/utils.ts @@ -1,15 +1,17 @@ -import { BoardState, Square, Player, PiecePosition } from "./models.js"; +import { fileToLetter, unparsePieceColour } from "./game/conversions.js";  import { GameBoard } from "./game/GameBoard"; +import { BoardState, PiecePosition, Player, Square } from "./models.js";  import { GamePiece } from "./rules/piece.js"; -import { fileToLetter, unparsePieceColour } from "./game/conversions.js";   -// Return a list of possible positions within dimensions +// Return a list of possible positions within dimensions.  +// Iterative implementation is much faster than functional implementation  export function enumeratePositions(dimensions: Square): Square[] { - const ranks = range(dimensions.rank); - const files = range(dimensions.file); - // 2-ary Cartesian product - return ranks.flatMap(x => files.map(y => { return { rank: x, file: y } as Square })); + const out = [];  + for (let i = 0; i < dimensions.file; i++)  + for (let j = 0; j < dimensions.rank; j++)  + out.push({ 'file': i, 'rank': j });  + return out;  }   commit bcd581d22a277d2f7e8766219f96412f516418af Author: alex Date: Wed Apr 20 16:59:00 2022 -0400 Add minimaxAB tests. Refactor AI, myopic minimax AI. Add deterministic AI. diff --git a/.vscode/launch.json b/.vscode/launch.json index d597a6b..644a546 100644 --- a/.vscode/launch.json +++ b/.vscode/launch.json @@ -46,6 +46,17 @@ "type": "pwa-node", "preLaunchTask": "build core" }, + { + "name": "Test Minimax pruning", + "program": "${workspaceFolder}/core/perf/test_minimaxPruning.ts", + "request": "launch", + "console": "integratedTerminal", + "skipFiles": [ + "/**" + ], + "type": "pwa-node", + "preLaunchTask": "build core" + }, { "name": "Minimax Performance", "program": "${workspaceFolder}/core/perf/minimaxPerformance.ts", diff --git a/core/ai/interface.ts b/core/ai/base.ts similarity index 66% rename from core/ai/interface.ts rename to core/ai/base.ts index 1d3ecac..8a904f0 100755 --- a/core/ai/interface.ts +++ b/core/ai/base.ts @@ -4,10 +4,13 @@ import { GameBoard } from "../game/GameBoard";   export abstract class AIPlayer { - protected difficulty: number; - constructor(difficulty: number) { + protected readonly difficulty: number[];  + constructor(...difficulty: number[]) {  this.difficulty = difficulty; } + protected difficulty_param(index: number): number {  + return this.difficulty[index] || 0;  + }  abstract move(position: GameBoard, player: Player): Move; abstract draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition; } diff --git a/core/ai/deterministic.ts b/core/ai/deterministic.ts new file mode 100755 index 0000000..c701cc8 --- /dev/null +++ b/core/ai/deterministic.ts @@ -0,0 +1,29 @@ +import { DraftRules } from "../draft/draftRules.js";  +import { GameBoard } from "../game/GameBoard";  +import { BoardState, Move, PiecePosition, PieceType, Player, Square } from "../models.js";  +import { nextEmptySquare } from "../utils.js";  +import { AIPlayer } from "./base.js";  +  +  +export default class determinsticAI extends AIPlayer {  + private randomState = this.difficulty_param(0) || 1;  +  + move(position: GameBoard, player: Player): Move {  + const b = position.gamePieces.filter(p => p.state.player === player)  + .flatMap(p => p.getLegalMoves(position.rules.rules.kingCheck, position)  + .map(to => { return { 'from': p.state.position, 'to': to }; }));  + return b[Math.floor(this.prng() * b.length)] as Move;  + }  +  + draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition {  + const pieces = Object.values(PieceType).filter(p => rules.pieceCost[p] <= points);  + const piece = pieces[Math.floor(this.prng() * pieces.length)] as PieceType;  + return { 'piece': piece, 'player': player, 'position': nextEmptySquare(board, player) as Square };  + }  +  + // simple PRNG taken from https://stackoverflow.com/a/19303725/9074788  + private prng() {  + const x = Math.sin(this.randomState++) * 10000;  + return x - Math.floor(x);  + }  +} \ No newline at end of file diff --git a/core/ai/minimax.ts b/core/ai/minimax.ts index 941e5dc..7fb387e 100755 --- a/core/ai/minimax.ts +++ b/core/ai/minimax.ts @@ -1,10 +1,8 @@ -import { DraftRules } from "../draft/draftRules.js"; import { boardToState } from "../game/conversions.js"; -import { checkGameState, cloneBoard, GameStatus, nextPlayer, updateWithMove } from "../game/gameModel.js"; -import { Player, Move, BoardState, PiecePosition } from "../models.js"; import { GameBoard } from "../game/GameBoard"; +import { checkGameState, cloneBoard, GameStatus, nextPlayer, updateWithMove } from "../game/gameModel.js";  +import { Move, Player } from "../models.js";  import { countPieces, printBoard } from "../utils.js"; -import { AIPlayer } from "./interface.js"; import randomAI from "./random.js";  interface MoveVal { @@ -14,16 +12,16 @@ interface MoveVal {  const DEBUG = false;  -export class minimaxAI extends AIPlayer { - move(position: GameBoard, player: Player): Move { - const move = this._minimax(position, player, 0, this.difficulty) as MoveVal; +export class minimaxAI extends randomAI {  + public val = 0;  +  + override move(position: GameBoard, player: Player): Move {  + const move = this._minimax(position, player, 0, this.difficulty_param(0)) as MoveVal;  DEBUG && console.log("Eval:", move.val); + this.val = move.val;  return move.move; }  - draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition { - return random.draft(rules, board, player, points); - }  _minimax(position: GameBoard, player: Player, depth: number, max_depth: number): number | MoveVal { const state = checkGameState(position, player); @@ -68,9 +66,8 @@ export class minimaxAI extends AIPlayer { } }  -const random = new randomAI(0);  -function possibleMoves(position: GameBoard, player: Player): Move[] { +export function possibleMoves(position: GameBoard, player: Player): Move[] {  return position.gamePieces .filter(p => p.state.player === player) .flatMap(p => p.getLegalMoves(position.rules.rules.kingCheck, position) diff --git a/core/ai/minimaxAB.ts b/core/ai/minimaxAB.ts index 16d2e74..12e2614 100755 --- a/core/ai/minimaxAB.ts +++ b/core/ai/minimaxAB.ts @@ -1,10 +1,7 @@ -import { DraftRules } from "../draft/draftRules.js"; -import { boardToState } from "../game/conversions.js"; -import { checkGameState, cloneBoard, GameStatus, nextPlayer, updateWithMove } from "../game/gameModel.js"; -import { Player, Move, BoardState, PiecePosition } from "../models.js"; import { GameBoard } from "../game/GameBoard"; -import { countPieces, printBoard } from "../utils.js"; -import { AIPlayer } from "./interface.js"; +import { checkGameState, cloneBoard, nextPlayer, updateWithMove } from "../game/gameModel.js";  +import { Move, Player } from "../models.js";  +import { evaluate, possibleMoves } from "./minimax.js";  import randomAI from "./random.js";  interface MoveVal { @@ -12,26 +9,23 @@ interface MoveVal { val: number }  -const DEBUG = true; +const DEBUG = false;   -export class minimaxAlphaBetaAI extends AIPlayer { +export class minimaxAlphaBetaAI extends randomAI {  private skips = 0; private visits = 0; + public val = 0;   - move(position: GameBoard, player: Player): Move { + override move(position: GameBoard, player: Player): Move {  this.skips = 0; this.visits = 0; - - const move = this.minimax(position, player, 0, this.difficulty, -Infinity, Infinity) as MoveVal; + const move = this.minimax(position, player, 0, this.difficulty_param(0), -Infinity, Infinity) as MoveVal;  DEBUG && console.log("Eval:", move.val); DEBUG && console.log("Visited %d, skipped %d", this.visits, this.skips); + this.val = move.val;  return move.move; }  - draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition { - return random.draft(rules, board, player, points); - } - private minimax(position: GameBoard, player: Player, depth: number, max_depth: number, alpha: number, beta: number): number | MoveVal { const state = checkGameState(position, player); // leaf node @@ -75,26 +69,3 @@ export class minimaxAlphaBetaAI extends AIPlayer { } } } - -const random = new randomAI(0); - - -function possibleMoves(position: GameBoard, player: Player): Move[] { - return position.gamePieces - .filter(p => p.state.player === player) - .flatMap(p => p.getLegalMoves(position.rules.rules.kingCheck, position) - .map(to => { return { 'from': p.state.position, 'to': to }; })); -} - -// evaluate game state based on advantage for White -export function evaluate(position: GameBoard, player: Player, status?: GameStatus): number { - status = status || checkGameState(position, player); - const board = boardToState(position); - const max_val = board.boardDimensions.file * board.boardDimensions.rank; - if (status.status === "draw") - return 0; - else if (status.status === "loss") - return player === Player.White ? -max_val : max_val; - else - return 2 * (position.gamePieces.length / 2 - countPieces(board, p => p.player === Player.Black)); -} diff --git a/core/ai/myopic_minimax.ts b/core/ai/myopic_minimax.ts new file mode 100755 index 0000000..a72ebd1 --- /dev/null +++ b/core/ai/myopic_minimax.ts @@ -0,0 +1,25 @@ +import { DraftRules } from "../draft/draftRules.js";  +import { Player, Move, BoardState, PiecePosition } from "../models.js";  +import { GameBoard } from "../game/GameBoard";  +import { AIPlayer } from "./base.js";  +import randomAI from "./random.js";  +import { minimaxAlphaBetaAI } from "./minimaxAB.js";  +  +  +  +  +export default class MyopicMiniMax extends minimaxAlphaBetaAI {  + private ai;  + constructor(ai: AIPlayer = new randomAI(), ...difficulty: number[]) {  + super(1, ...difficulty);  + this.ai = ai;  + }  + override move(position: GameBoard, player: Player): Move {  + return Math.random() > this.difficulty_param(1) ? this.ai.move(position, player) : super.move(position, player);  + }  +  + draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition {  + return this.ai.draft(rules, board, player, points);  + }  +  +} \ No newline at end of file diff --git a/core/ai/myopic_minimax_random.ts b/core/ai/myopic_minimax_random.ts deleted file mode 100755 index c56e580..0000000 --- a/core/ai/myopic_minimax_random.ts +++ /dev/null @@ -1,20 +0,0 @@ -import { DraftRules } from "../draft/draftRules.js"; -import { Player, Move, BoardState, PiecePosition } from "../models.js"; -import { GameBoard } from "../game/GameBoard"; -import { AIPlayer } from "./interface.js"; -import randomAI from "./random.js"; -import { minimaxAI } from "./minimax.js"; - -const random = new randomAI(0); -const myopicMiniMax = new minimaxAI(1); - -export default class MyopicMiniMaxRandom extends AIPlayer { - move(position: GameBoard, player: Player): Move { - return Math.random() > this.difficulty ? random.move(position, player) : myopicMiniMax.move(position, player); - } - - draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition { - return random.draft(rules, board, player, points); - } - -} \ No newline at end of file diff --git a/core/ai/random.ts b/core/ai/random.ts index 67353d8..779d413 100755 --- a/core/ai/random.ts +++ b/core/ai/random.ts @@ -2,7 +2,7 @@ import { DraftRules } from "../draft/draftRules.js"; import { Player, Move, BoardState, PiecePosition, PieceType, Square } from "../models.js"; import { GameBoard } from "../game/GameBoard"; import { nextEmptySquare, randItem } from "../utils.js"; -import { AIPlayer } from "./interface.js"; +import { AIPlayer } from "./base.js";    export default class randomAI extends AIPlayer { diff --git a/core/draft/draftController.ts b/core/draft/draftController.ts index 9993570..2335168 100644 --- a/core/draft/draftController.ts +++ b/core/draft/draftController.ts @@ -1,4 +1,4 @@ -import { AIPlayer } from "../ai/interface.js"; +import { AIPlayer } from "../ai/base.js"; import randomAI from "../ai/random.js"; import { unparseSquare } from "../game/conversions.js"; import { BoardState, PiecePosition, Player } from "../models.js"; @@ -18,7 +18,7 @@ export function validateDraftChoice(rules: DraftRules, board: BoardState, player  // this is a draft controller. It's really only useful for CLI games - do not use this for event-driven uses export async function runAIDraft(draftRules: DraftRules, board: BoardState, choosePiece: (rules: DraftRules, board: BoardState, player: Player, points: number) => Promise): Promise { - const ai: AIPlayer = new randomAI(0); + const ai: AIPlayer = new randomAI(); const draft = new Draft(board, draftRules, Player.White);  for (let round = 0; round < draftRules.rounds; round++) { diff --git a/core/game/gameCLI.ts b/core/game/gameCLI.ts index b52e80b..132dbda 100644 --- a/core/game/gameCLI.ts +++ b/core/game/gameCLI.ts @@ -1,4 +1,4 @@ -import { AIPlayer } from "../ai/interface.js"; +import { AIPlayer } from "../ai/base.js"; import randomAI from "../ai/random.js"; import { BoardState, Move, Player } from "../models.js"; import { RuleSet } from "../rules/piece.js"; diff --git a/core/perf/AIVersusGame.ts b/core/perf/AIVersusGame.ts index 3b30025..388ed6c 100644 --- a/core/perf/AIVersusGame.ts +++ b/core/perf/AIVersusGame.ts @@ -1,4 +1,4 @@ -import { AIPlayer } from "../ai/interface.js"; +import { AIPlayer } from "../ai/base.js"; import { Game, GameStatus } from "../game/gameModel.js"; import { BoardState, Player } from "../models.js"; import { RuleSet } from "../rules/piece.js"; diff --git a/core/perf/minimaxPerformance.ts b/core/perf/minimaxPerformance.ts index db3225f..fe1a788 100644 --- a/core/perf/minimaxPerformance.ts +++ b/core/perf/minimaxPerformance.ts @@ -1,5 +1,5 @@ import { minimaxAI } from "../ai/minimax"; -import MyopicMiniMaxRandom from "../ai/myopic_minimax_random"; +import MyopicMiniMax from "../ai/myopic_minimax"; import randomAI from "../ai/random"; import { BoardState, Player, Square } from "../models"; import X8_rooks_knight from "../positions/2x8_rooks_knight"; @@ -10,14 +10,9 @@ import runAIVersus from "./AIVersusGame"; import generateBoard from "./generateBoard";   - - - - - export function versus(runs: number) { const cpu1 = new minimaxAI(5); - const cpu2 = new randomAI(3); + const cpu2 = new randomAI(); let wins = 0, losses = 0; for (let index = 0; index < runs; index++) { const result = runAIVersus(X8_rooks_knight(), new SimpleRuleSet(), cpu1, cpu2); @@ -34,7 +29,7 @@ export function versus(runs: number) {  export function boardValue(strength: number, runs: number, board: BoardState, rules: RuleSet): [number, number, number] { const cpu1 = new minimaxAI(strength); - const cpu2 = new MyopicMiniMaxRandom(0.5); + const cpu2 = new MyopicMiniMax(new randomAI(), 0.5); let wins = 0, losses = 0, max_turns = 0; for (let index = 0; index < runs; index++) { const result = runAIVersus(board, rules, cpu1, cpu2); diff --git a/core/perf/test_minimaxPruning.ts b/core/perf/test_minimaxPruning.ts new file mode 100644 index 0000000..d9b302a --- /dev/null +++ b/core/perf/test_minimaxPruning.ts @@ -0,0 +1,40 @@ +import deterministicAI from "../ai/deterministic"; +import { minimaxAI } from "../ai/minimax"; +import { minimaxAlphaBetaAI } from "../ai/minimaxAB"; +import MyopicMiniMax from "../ai/myopic_minimax"; +import { Game, GameStatus } from "../game/gameModel.js"; +import { BoardState, Player } from "../models.js"; +import { RuleSet } from "../rules/piece.js"; +import { SimpleRuleSet } from "../rules/simplePieces"; +import { moveEq } from "../tests/utils/moveEq"; +import newBoard from "./generateBoard.js"; + + +// both players make a ply -> 1 move +const MAX_MOVES = 100; + +export function testMiniMaxes(board: BoardState, ruleSet: RuleSet, depth: number): [GameStatus, number] { + + const minimax = new minimaxAI(depth); + const minimaxAB = new minimaxAlphaBetaAI(depth); + const cpu3 = new MyopicMiniMax(new deterministicAI(1), 0.7); + const game: Game = new Game(ruleSet, board); + let move_count = 0; + while (game.gameStatus.status === "playing" && move_count < MAX_MOVES) { + const move1 = minimax.move(game.gameBoard, Player.White); + const move2 = minimaxAB.move(game.gameBoard, Player.White); + console.assert(moveEq, "", move1, move2); + console.assert(minimax.val === minimaxAB.val, "", minimax.val, minimaxAB.val); + console.log("passed", move_count); + game.makeMove(Player.White, move1); + if (game.gameStatus.status !== "playing") + break; + game.makeMove(Player.Black, cpu3.move(game.gameBoard, Player.Black)); + move_count++; + } + if (move_count === MAX_MOVES) + game.gameStatus.status = "draw"; + return [game.gameStatus, move_count]; +} + +testMiniMaxes(newBoard({ 'file': 3, 'rank': 9 }, 6, true), new SimpleRuleSet(), 3); \ No newline at end of file diff --git a/core/tests/test_parseSquare.ts b/core/tests/test_parseSquare.ts index b4fcc9c..40dbb6e 100644 --- a/core/tests/test_parseSquare.ts +++ b/core/tests/test_parseSquare.ts @@ -1,6 +1,8 @@  import { parseMove, parseSquare } from "../game/conversions.js"; import { Move, Square } from "../models.js"; +import { moveEq } from "./utils/moveEq"; +import { squareEq } from "./utils/squareEq";   export default () => { @@ -54,16 +56,3 @@ export default () => {  }  -function squareEq(s1: Square | null, s2: Square | null) { - return s1 && s2 - && s1.file === s2.file - && s1.rank === s2.rank; -} - -function moveEq(m1: Move | null, m2: Move | null) { - return m1 && m2 - && m1.from && m1.to - && m2.from && m2.to - && squareEq(m1.from, m2.from) - && squareEq(m1.to, m2.to); -} \ No newline at end of file diff --git a/core/tests/utils/moveEq.ts b/core/tests/utils/moveEq.ts new file mode 100644 index 0000000..dcdfe0a --- /dev/null +++ b/core/tests/utils/moveEq.ts @@ -0,0 +1,10 @@ +import { Move } from "../../models.js"; +import { squareEq } from "./squareEq"; + +export function moveEq(m1: Move | null, m2: Move | null) { + return m1 && m2 + && m1.from && m1.to + && m2.from && m2.to + && squareEq(m1.from, m2.from) + && squareEq(m1.to, m2.to); +} diff --git a/core/tests/utils/squareEq.ts b/core/tests/utils/squareEq.ts new file mode 100644 index 0000000..02e777f --- /dev/null +++ b/core/tests/utils/squareEq.ts @@ -0,0 +1,8 @@ +import { Square } from "../../models.js"; + + +export function squareEq(s1: Square | null, s2: Square | null) { + return s1 && s2 + && s1.file === s2.file + && s1.rank === s2.rank; +} diff --git a/front-end/controller.ts b/front-end/controller.ts index 58c460c..523ef34 100644 --- a/front-end/controller.ts +++ b/front-end/controller.ts @@ -1,24 +1,32 @@    -import chessboard from "../lib/chessboard.js"; -import { Game, MoveStatus } from "../core/game/gameModel.js"; +import { AIPlayer } from "../core/ai/base.js"; +import randomAI from "../core/ai/random.js"; +import draftRules1D from "../core/draft/1dDraftRules.js"; +import { Draft } from "../core/draft/draftModel.js"; +import { DraftRules } from "../core/draft/draftRules.js"; import { parseSquare, unparseMove, unparseSquare } from "../core/game/conversions.js"; -import starting_position from "../core/positions/1d_standard.js"; -import empty_position from "../core/positions/1x8_empty.js"; +import { Game, MoveStatus } from "../core/game/gameModel.js"; import { BoardState, Player } from "../core/models.js"; -import { Draft } from "../core/draft/draftModel.js"; -import { AIPlayer } from "../core/ai/interface.js"; -import randomAI from "../core/ai/random.js"; +import empty_position from "../core/positions/empty"; +import starting_position from "../core/positions/normal_chess"; import { RuleSet } from "../core/rules/piece.js"; import { SimpleRuleSet1D } from "../core/rules/simplePieces1D.js"; +import chessboard from "../lib/chessboard.js"; import { objToBoardObj, parseObjPiece, unparseObjPiece } from "./core_adapter.js"; -import { DraftRules } from "../core/draft/draftRules.js"; -import draftRules1D from "../core/draft/1dDraftRules.js";  type action = "snapback" | "trash" | "drop";   +// global state +let game: Game; +let draft: Draft; +const CPU: AIPlayer = new randomAI(); +const draftRules: DraftRules = draftRules1D; +let _element: Node | string; +let destroy: { (): void } | undefined; +  // When a move is made via the UI, send that move and wait for a response move function onMove(source: string, target: string, _piece: string, @@ -59,15 +67,6 @@ function checkStatus() {  }  - -// global state -let game: Game; -let draft: Draft; -const CPU: AIPlayer = new randomAI(0); -const draftRules: DraftRules = draftRules1D; -let _element: Node | string; -let destroy: { (): void } | undefined; - export function startGame(element: string | Node) { const files = 1; const ranks = 8; @@ -91,7 +90,7 @@ export function startDraftGame(element: string | Node) { const files = 1; const ranks = 8;  - const board: BoardState = empty_position(); + const board: BoardState = empty_position({ 'file': files, 'rank': ranks }); const draftConfig = { 'columns': files, 'rows': ranks, commit 39512adde34a5ece411a7ef67a363fa33a333f45 Author: alex Date: Wed Apr 20 15:10:00 2022 -0400 Add AB pruning for MiniMax diff --git a/core/ai/minimaxAB.ts b/core/ai/minimaxAB.ts new file mode 100755 index 0000000..16d2e74 --- /dev/null +++ b/core/ai/minimaxAB.ts @@ -0,0 +1,100 @@ +import { DraftRules } from "../draft/draftRules.js";  +import { boardToState } from "../game/conversions.js";  +import { checkGameState, cloneBoard, GameStatus, nextPlayer, updateWithMove } from "../game/gameModel.js";  +import { Player, Move, BoardState, PiecePosition } from "../models.js";  +import { GameBoard } from "../game/GameBoard";  +import { countPieces, printBoard } from "../utils.js";  +import { AIPlayer } from "./interface.js";  +import randomAI from "./random.js";  +  +interface MoveVal {  + move: Move  + val: number  +}  +  +const DEBUG = true;  +  +export class minimaxAlphaBetaAI extends AIPlayer {  + private skips = 0;  + private visits = 0;  +  + move(position: GameBoard, player: Player): Move {  + this.skips = 0;  + this.visits = 0;  +  + const move = this.minimax(position, player, 0, this.difficulty, -Infinity, Infinity) as MoveVal;  + DEBUG && console.log("Eval:", move.val);  + DEBUG && console.log("Visited %d, skipped %d", this.visits, this.skips);  + return move.move;  + }  +  + draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition {  + return random.draft(rules, board, player, points);  + }  +  + private minimax(position: GameBoard, player: Player, depth: number, max_depth: number, alpha: number, beta: number): number | MoveVal {  + const state = checkGameState(position, player);  + // leaf node  + if (depth === max_depth || state.status !== "playing") {  + this.visits++;  + const val = evaluate(position, player, state);  + if (DEBUG) {  + console.log("Evaluation:", val);  + // printBoard(boardToState(position));  + }  + return val;  + }  + else {  + const moves = possibleMoves(position, player);  + const moveVal = moves.reduce((prev, cur) => {  + if (alpha >= beta) {  + this.skips++;  + DEBUG && console.log("Skipped at depth", depth);  + return prev;  + }  + const move_board = cloneBoard(position);  + updateWithMove(move_board, cur);  + const result = this.minimax(move_board, nextPlayer(player), depth + 1, max_depth, alpha, beta);  + const resultVal = typeof result === "number" ? result : result.val; // need to absorb leaf node values  + // get min/max move value  + if (player === Player.White && resultVal > alpha) {  + DEBUG && console.log("Found better MAX: %d > %d", resultVal, alpha);  + alpha = resultVal;  + return { 'move': cur, 'val': resultVal };  + }  + else if (player === Player.Black && resultVal < beta) {  + DEBUG && console.log("Found better MIN: %d < %d", resultVal, beta);  + beta = resultVal;  + return { 'move': cur, 'val': resultVal };  + }  + else {  + return prev;  + }  + }, { 'move': { 'from': { 'file': 0, 'rank': 0 }, 'to': { 'file': 0, 'rank': 0 } }, 'val': player === Player.White ? alpha : beta });  + return moveVal;  + }  + }  +}  +  +const random = new randomAI(0);  +  +  +function possibleMoves(position: GameBoard, player: Player): Move[] {  + return position.gamePieces  + .filter(p => p.state.player === player)  + .flatMap(p => p.getLegalMoves(position.rules.rules.kingCheck, position)  + .map(to => { return { 'from': p.state.position, 'to': to }; }));  +}  +  +// evaluate game state based on advantage for White  +export function evaluate(position: GameBoard, player: Player, status?: GameStatus): number {  + status = status || checkGameState(position, player);  + const board = boardToState(position);  + const max_val = board.boardDimensions.file * board.boardDimensions.rank;  + if (status.status === "draw")  + return 0;  + else if (status.status === "loss")  + return player === Player.White ? -max_val : max_val;  + else  + return 2 * (position.gamePieces.length / 2 - countPieces(board, p => p.player === Player.Black));  +}  diff --git a/core/perf/minimaxPerformance.ts b/core/perf/minimaxPerformance.ts index 3759b87..db3225f 100644 --- a/core/perf/minimaxPerformance.ts +++ b/core/perf/minimaxPerformance.ts @@ -54,7 +54,7 @@ export function testBoards(dim: Square, boards: number, runs: number, pieces: nu const board = generateBoard(dim, pieces, true); printBoard(board); const [wins, losses, max_moves] = boardValue(strength, runs, board, rules); - console.log("wins: %d, losses: %d, ties: %d, winrate: %f", wins, losses, runs - wins + losses, wins / runs); + console.log("wins: %d, losses: %d, ties: %d, winrate: %f", wins, losses, runs - wins - losses, wins / runs); board_wrs.push([board, wins, losses, max_moves]); } return board_wrs; commit a9b7171d2eb0164592e20e39d9f126412a44964f Author: alex Date: Mon Apr 18 15:48:17 2022 -0400 Add proper test to look for interesting boards diff --git a/core/ai/myopic_minimax_random.ts b/core/ai/myopic_minimax_random.ts new file mode 100755 index 0000000..c56e580 --- /dev/null +++ b/core/ai/myopic_minimax_random.ts @@ -0,0 +1,20 @@ +import { DraftRules } from "../draft/draftRules.js";  +import { Player, Move, BoardState, PiecePosition } from "../models.js";  +import { GameBoard } from "../game/GameBoard";  +import { AIPlayer } from "./interface.js";  +import randomAI from "./random.js";  +import { minimaxAI } from "./minimax.js";  +  +const random = new randomAI(0);  +const myopicMiniMax = new minimaxAI(1);  +  +export default class MyopicMiniMaxRandom extends AIPlayer {  + move(position: GameBoard, player: Player): Move {  + return Math.random() > this.difficulty ? random.move(position, player) : myopicMiniMax.move(position, player);  + }  +  + draft(rules: DraftRules, board: BoardState, player: Player, points: number): PiecePosition {  + return random.draft(rules, board, player, points);  + }  +  +} \ No newline at end of file diff --git a/core/perf/generateBoard.ts b/core/perf/generateBoard.ts index 43a603d..c20d65e 100644 --- a/core/perf/generateBoard.ts +++ b/core/perf/generateBoard.ts @@ -1,9 +1,9 @@ -import { PieceType, Player, Square } from "../models"; +import { BoardState, PieceType, Player, Square } from "../models"; import empty from "../positions/empty"; import { nextEmptySquare, randItem } from "../utils";   -export default (dim: Square, pieces: number, symmetric: boolean) => { +export default (dim: Square, pieces: number, symmetric: boolean): BoardState => { const board = empty(dim); board.pieces.push({ 'piece': PieceType.King, 'player': Player.White, 'position': nextEmptySquare(board, Player.White) as Square }); board.pieces.push({ 'piece': PieceType.King, 'player': Player.Black, 'position': nextEmptySquare(board, Player.Black) as Square }); @@ -19,8 +19,11 @@ export default (dim: Square, pieces: number, symmetric: boolean) => { const piece2 = randItem(Object.values(PieceType)); board.pieces.push({ 'piece': piece2, 'player': Player.Black, 'position': nextEmptySquare(board, Player.Black) as Square }); } + pieces--; } catch (error) { console.error(error); + break; } } + return board; } \ No newline at end of file diff --git a/core/perf/minimaxPerformance.ts b/core/perf/minimaxPerformance.ts index 6b3b319..3759b87 100644 --- a/core/perf/minimaxPerformance.ts +++ b/core/perf/minimaxPerformance.ts @@ -1,9 +1,13 @@ import { minimaxAI } from "../ai/minimax"; +import MyopicMiniMaxRandom from "../ai/myopic_minimax_random"; import randomAI from "../ai/random"; -import { Player } from "../models"; +import { BoardState, Player, Square } from "../models"; import X8_rooks_knight from "../positions/2x8_rooks_knight"; +import { RuleSet } from "../rules/piece"; import { SimpleRuleSet } from "../rules/simplePieces"; +import { printBoard } from "../utils"; import runAIVersus from "./AIVersusGame"; +import generateBoard from "./generateBoard";    @@ -11,7 +15,7 @@ import runAIVersus from "./AIVersusGame";    -export default function run(runs: number) { +export function versus(runs: number) { const cpu1 = new minimaxAI(5); const cpu2 = new randomAI(3); let wins = 0, losses = 0; @@ -24,8 +28,41 @@ export default function run(runs: number) { else wins++; } - console.log("wins: %s, losses: %s, winrate: %f", wins, losses, wins/runs); + console.log("wins: %s, losses: %s, winrate: %f", wins, losses, wins / runs); }   -run(100); +export function boardValue(strength: number, runs: number, board: BoardState, rules: RuleSet): [number, number, number] { + const cpu1 = new minimaxAI(strength); + const cpu2 = new MyopicMiniMaxRandom(0.5); + let wins = 0, losses = 0, max_turns = 0; + for (let index = 0; index < runs; index++) { + const result = runAIVersus(board, rules, cpu1, cpu2); + console.log(index, result); + if (result[0].status === "loss") + if (result[0].player === Player.Black) + wins++; + else losses++; + max_turns = Math.max(max_turns, result[1]); + } + return [wins, losses, max_turns]; +} + +export function testBoards(dim: Square, boards: number, runs: number, pieces: number, strength: number, rules: RuleSet) { + const board_wrs = []; + for (let i = 0; i < boards; i++) { + const board = generateBoard(dim, pieces, true); + printBoard(board); + const [wins, losses, max_moves] = boardValue(strength, runs, board, rules); + console.log("wins: %d, losses: %d, ties: %d, winrate: %f", wins, losses, runs - wins + losses, wins / runs); + board_wrs.push([board, wins, losses, max_moves]); + } + return board_wrs; +} + + + +testBoards({ 'file': 2, 'rank': 9 }, 100, 50, 3, 4, new SimpleRuleSet()).forEach(([b, w, l, m]) => { + printBoard(b as BoardState); + console.log(w, l, m); +});;