X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FShogi.js;h=95be2d1b3a1fffa8c866fd047ebb527c8ca3df9e;hb=e30523f27d5989903de6743a8b4f194a390d576c;hp=082d93917c85a438fc271b736a57066b3063aa9c;hpb=e2f204eda8630746cb951889da01241b1e5f5733;p=vchess.git diff --git a/client/src/variants/Shogi.js b/client/src/variants/Shogi.js index 082d9391..95be2d1b 100644 --- a/client/src/variants/Shogi.js +++ b/client/src/variants/Shogi.js @@ -1,8 +1,9 @@ import { ChessRules, PiPo, Move } from "@/base_rules"; import { ArrayFun } from "@/utils/array"; -import { shuffle } from "@/utils/alea"; +import { sample, shuffle } from "@/utils/alea"; export class ShogiRules extends ChessRules { + static get HasFlags() { return false; } @@ -11,6 +12,23 @@ export class ShogiRules extends ChessRules { return false; } + static get Monochrome() { + return true; + } + + get showFirstTurn() { + return true; + } + + static get Notoodark() { + return true; + } + + get loseOnRepetition() { + // If current side is under check: lost + return this.underCheck(this.turn); + } + static IsGoodFen(fen) { if (!ChessRules.IsGoodFen(fen)) return false; const fenParsed = V.ParseFen(fen); @@ -95,27 +113,56 @@ export class ShogiRules extends ChessRules { ); } - static GenRandInitFen(randomness) { - if (randomness == 0) { + static GenRandInitFen(options) { + if (options.randomness == 0) { return ( "lnsgkgsnl/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/LNSGKGSNL " + "w 0 00000000000000" ); } - let pieces = { w: new Array(9), b: new Array(9) }; + // Randomization following these indications: + // http://www.shogi.net/shogi-l/Archive/2007/Nmar16-02.txt + let pieces1 = { w: new Array(4), b: new Array(4) }; + let positions2 = { w: new Array(2), b: new Array(2) }; for (let c of ["w", "b"]) { - if (c == 'b' && randomness == 1) { - pieces['b'] = pieces['w']; + if (c == 'b' && options.randomness == 1) { + pieces1['b'] = JSON.parse(JSON.stringify(pieces1['w'])).reverse(); + positions2['b'] = + JSON.parse(JSON.stringify(positions2['w'])).reverse() + .map(p => 8 - p); break; } - let positions = shuffle(ArrayFun.range(9)); - const composition = ['l', 'l', 'n', 'n', 's', 's', 'g', 'g', 'k']; - for (let i = 0; i < 9; i++) pieces[c][positions[i]] = composition[i]; + let positions = shuffle(ArrayFun.range(4)); + const composition = ['s', 's', 'g', 'g']; + for (let i = 0; i < 4; i++) pieces1[c][positions[i]] = composition[i]; + positions2[c] = sample(ArrayFun.range(9), 2).sort(); } return ( - pieces["b"].join("") + - "/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/" + - pieces["w"].join("").toUpperCase() + + ( + "ln" + + pieces1["b"].slice(0, 2).join("") + + "k" + + pieces1["b"].slice(2, 4).join("") + + "nl/" + ) + + ( + (positions2['b'][0] || "") + 'r' + + (positions2['b'][1] - positions2['b'][0] - 1 || "") + 'b' + + (8 - positions2['b'][1] || "") + ) + + "/ppppppppp/9/9/9/PPPPPPPPP/" + + ( + (positions2['w'][0] || "") + 'B' + + (positions2['w'][1] - positions2['w'][0] - 1 || "") + 'R' + + (8 - positions2['w'][1] || "") + ) + + ( + "/LN" + + pieces1["w"].slice(0, 2).join("").toUpperCase() + + "K" + + pieces1["w"].slice(2, 4).join("").toUpperCase() + + "NL" + ) + " w 0 00000000000000" ); } @@ -139,26 +186,27 @@ export class ShogiRules extends ChessRules { setOtherVariables(fen) { super.setOtherVariables(fen); - const fenParsed = V.ParseFen(fen); // Also init reserves (used by the interface to show landable pieces) + const reserve = + V.ParseFen(fen).reserve.split("").map(x => parseInt(x, 10)); this.reserve = { w: { - [V.PAWN]: parseInt(fenParsed.reserve[0]), - [V.ROOK]: parseInt(fenParsed.reserve[1]), - [V.BISHOP]: parseInt(fenParsed.reserve[2]), - [V.GOLD_G]: parseInt(fenParsed.reserve[3]), - [V.SILVER_G]: parseInt(fenParsed.reserve[4]), - [V.KNIGHT]: parseInt(fenParsed.reserve[5]), - [V.LANCE]: parseInt(fenParsed.reserve[6]) + [V.PAWN]: reserve[0], + [V.ROOK]: reserve[1], + [V.BISHOP]: reserve[2], + [V.GOLD_G]: reserve[3], + [V.SILVER_G]: reserve[4], + [V.KNIGHT]: reserve[5], + [V.LANCE]: reserve[6] }, b: { - [V.PAWN]: parseInt(fenParsed.reserve[7]), - [V.ROOK]: parseInt(fenParsed.reserve[8]), - [V.BISHOP]: parseInt(fenParsed.reserve[9]), - [V.GOLD_G]: parseInt(fenParsed.reserve[10]), - [V.SILVER_G]: parseInt(fenParsed.reserve[11]), - [V.KNIGHT]: parseInt(fenParsed.reserve[12]), - [V.LANCE]: parseInt(fenParsed.reserve[13]) + [V.PAWN]: reserve[7], + [V.ROOK]: reserve[8], + [V.BISHOP]: reserve[9], + [V.GOLD_G]: reserve[10], + [V.SILVER_G]: reserve[11], + [V.KNIGHT]: reserve[12], + [V.LANCE]: reserve[13] } }; } @@ -239,7 +287,9 @@ export class ShogiRules extends ChessRules { if (p == V.PAWN) { // Do not drop on checkmate: this.play(mv); - const res = (this.underCheck(oppCol) && !this.atLeastOneMove()); + const res = ( + this.underCheck(oppCol) && !this.atLeastOneMove("noReserve") + ); this.undo(mv); if (res) continue; } @@ -269,7 +319,7 @@ export class ShogiRules extends ChessRules { case V.LANCE: return this.getPotentialLanceMoves([x, y]); case V.KING: - return this.getPotentialKingMoves([x, y]); + return super.getPotentialKingMoves([x, y]); case V.P_ROOK: return this.getPotentialDragonMoves([x, y]); case V.P_BISHOP: @@ -285,7 +335,7 @@ export class ShogiRules extends ChessRules { } // Modified to take promotions into account - getSlideNJumpMoves([x, y], steps, options) { + getSlideNJumpMoves_opt([x, y], steps, options) { options = options || {}; const color = this.turn; const oneStep = options.oneStep; @@ -325,7 +375,7 @@ export class ShogiRules extends ChessRules { getPotentialGoldMoves(sq) { const forward = (this.turn == 'w' ? -1 : 1); - return this.getSlideNJumpMoves( + return this.getSlideNJumpMoves_opt( sq, V.steps[V.ROOK].concat([ [forward, 1], [forward, -1] ]), { oneStep: true } @@ -335,7 +385,7 @@ export class ShogiRules extends ChessRules { getPotentialPawnMoves(sq) { const forward = (this.turn == 'w' ? -1 : 1); return ( - this.getSlideNJumpMoves( + this.getSlideNJumpMoves_opt( sq, [[forward, 0]], { @@ -349,7 +399,7 @@ export class ShogiRules extends ChessRules { getPotentialSilverMoves(sq) { const forward = (this.turn == 'w' ? -1 : 1); - return this.getSlideNJumpMoves( + return this.getSlideNJumpMoves_opt( sq, V.steps[V.BISHOP].concat([ [forward, 0] ]), { @@ -361,7 +411,7 @@ export class ShogiRules extends ChessRules { getPotentialKnightMoves(sq) { const forward = (this.turn == 'w' ? -2 : 2); - return this.getSlideNJumpMoves( + return this.getSlideNJumpMoves_opt( sq, [ [forward, 1], [forward, -1] ], { @@ -372,41 +422,39 @@ export class ShogiRules extends ChessRules { ); } + getPotentialLanceMoves(sq) { + const forward = (this.turn == 'w' ? -1 : 1); + return this.getSlideNJumpMoves_opt( + sq, + [ [forward, 0] ], + { + promote: V.P_LANCE, + force: true + } + ); + } + getPotentialRookMoves(sq) { - return this.getSlideNJumpMoves( + return this.getSlideNJumpMoves_opt( sq, V.steps[V.ROOK], { promote: V.P_ROOK }); } getPotentialBishopMoves(sq) { - return this.getSlideNJumpMoves( + return this.getSlideNJumpMoves_opt( sq, V.steps[V.BISHOP], { promote: V.P_BISHOP }); } - getPotentialLanceMoves(sq) { - const forward = (this.turn == 'w' ? -1 : 1); - return this.getSlideNJumpMoves( - sq, [[forward, 0]], { promote: V.P_LANCE }); - } - getPotentialDragonMoves(sq) { return ( - this.getSlideNJumpMoves(sq, V.steps[V.ROOK]).concat( - this.getSlideNJumpMoves(sq, V.steps[V.BISHOP], { oneStep: true })) + this.getSlideNJumpMoves_opt(sq, V.steps[V.ROOK]).concat( + this.getSlideNJumpMoves_opt(sq, V.steps[V.BISHOP], { oneStep: true })) ); } getPotentialHorseMoves(sq) { return ( - this.getSlideNJumpMoves(sq, V.steps[V.BISHOP]).concat( - this.getSlideNJumpMoves(sq, V.steps[V.ROOK], { oneStep: true })) - ); - } - - getPotentialKingMoves(sq) { - return this.getSlideNJumpMoves( - sq, - V.steps[V.ROOK].concat(V.steps[V.BISHOP]), - { oneStep: true } + this.getSlideNJumpMoves_opt(sq, V.steps[V.BISHOP]).concat( + this.getSlideNJumpMoves_opt(sq, V.steps[V.ROOK], { oneStep: true })) ); } @@ -442,37 +490,21 @@ export class ShogiRules extends ChessRules { return false; } - isAttackedBySilver([x, y], color) { + isAttackedBySilver(sq, color) { const shift = (color == 'w' ? 1 : -1); - for (let step of V.steps[V.BISHOP].concat([[shift, 0]])) { - const [i, j] = [x + step[0], y + step[1]]; - if ( - V.OnBoard(i, j) && - this.board[i][j] != V.EMPTY && - this.getColor(i, j) == color && - this.getPiece(i, j) == V.SILVER_G - ) { - return true; - } - } - return false; + return this.isAttackedBySlideNJump( + sq, color, V.SILVER, V.steps[V.BISHOP].concat([ [shift, 0] ]), 1); } - isAttackedByPawn([x, y], color) { + isAttackedByPawn(sq, color) { const shift = (color == 'w' ? 1 : -1); - const [i, j] = [x + shift, y]; - return ( - V.OnBoard(i, j) && - this.board[i][j] != V.EMPTY && - this.getColor(i, j) == color && - this.getPiece(i, j) == V.PAWN - ); + return this.isAttackedBySlideNJump(sq, color, V.PAWN, [ [shift, 0] ], 1); } isAttackedByKnight(sq, color) { const forward = (color == 'w' ? 2 : -2); return this.isAttackedBySlideNJump( - sq, color, V.KNIGHT, [[forward, 1], [forward, -1]], "oneStep"); + sq, color, V.KNIGHT, [ [forward, 1], [forward, -1] ], 1); } isAttackedByLance(sq, color) { @@ -483,19 +515,36 @@ export class ShogiRules extends ChessRules { isAttackedByDragon(sq, color) { return ( this.isAttackedBySlideNJump(sq, color, V.P_ROOK, V.steps[V.ROOK]) || - this.isAttackedBySlideNJump( - sq, color, V.P_ROOK, V.steps[V.BISHOP], "oneStep") + this.isAttackedBySlideNJump(sq, color, V.P_ROOK, V.steps[V.BISHOP], 1) ); } isAttackedByHorse(sq, color) { return ( this.isAttackedBySlideNJump(sq, color, V.P_BISHOP, V.steps[V.BISHOP]) || - this.isAttackedBySlideNJump( - sq, color, V.P_BISHOP, V.steps[V.ROOK], "oneStep") + this.isAttackedBySlideNJump(sq, color, V.P_BISHOP, V.steps[V.ROOK], 1) ); } + filterValid(moves) { + if (moves.length == 0) return []; + const color = this.turn; + const lastRanks = (color == 'w' ? [0, 1] : [8, 7]); + return moves.filter(m => { + if ( + (m.appear[0].p == V.KNIGHT && lastRanks.includes(m.end.x)) || + ([V.PAWN, V.LANCE].includes(m.appear[0].p) && lastRanks[0] == m.end.x) + ) { + // Forbid moves resulting in a blocked piece + return false; + } + this.play(m); + const res = !this.underCheck(color); + this.undo(m); + return res; + }); + } + getAllValidMoves() { let moves = super.getAllPotentialMoves(); const color = this.turn; @@ -507,14 +556,16 @@ export class ShogiRules extends ChessRules { return this.filterValid(moves); } - atLeastOneMove() { + atLeastOneMove(noReserve) { if (!super.atLeastOneMove()) { - // Search one reserve move - for (let i = 0; i < V.RESERVE_PIECES.length; i++) { - let moves = this.filterValid( - this.getReserveMoves([V.size.x + (this.turn == "w" ? 0 : 1), i]) - ); - if (moves.length > 0) return true; + if (!noReserve) { + // Search one reserve move + for (let i = 0; i < V.RESERVE_PIECES.length; i++) { + let moves = this.filterValid( + this.getReserveMoves([V.size.x + (this.turn == "w" ? 0 : 1), i]) + ); + if (moves.length > 0) return true; + } } return false; } @@ -612,4 +663,5 @@ export class ShogiRules extends ChessRules { ) ); } + };