From: Benjamin Auder Date: Thu, 12 Mar 2020 20:32:02 +0000 (+0100) Subject: Almost debugged Eightpieces variant X-Git-Url: https://git.auder.net/%7B%7B%20asset%28%27mixstore/images/css/img/pieces/cb.svg?a=commitdiff_plain;h=ee3070443a7db2d5702a3a13f234b9af3b360c11;p=vchess.git Almost debugged Eightpieces variant --- diff --git a/client/src/base_rules.js b/client/src/base_rules.js index 33b0fc90..41ebc140 100644 --- a/client/src/base_rules.js +++ b/client/src/base_rules.js @@ -1034,13 +1034,13 @@ export const ChessRules = class ChessRules { move.start.x == firstRank && //our rook moves? this.INIT_COL_ROOK[c].includes(move.start.y) ) { - const flagIdx = move.start.y == this.INIT_COL_ROOK[c][0] ? 0 : 1; + const flagIdx = (move.start.y == this.INIT_COL_ROOK[c][0] ? 0 : 1); this.castleFlags[c][flagIdx] = false; } else if ( move.end.x == oppFirstRank && //we took opponent rook? this.INIT_COL_ROOK[oppCol].includes(move.end.y) ) { - const flagIdx = move.end.y == this.INIT_COL_ROOK[oppCol][0] ? 0 : 1; + const flagIdx = (move.end.y == this.INIT_COL_ROOK[oppCol][0] ? 0 : 1); this.castleFlags[oppCol][flagIdx] = false; } } diff --git a/client/src/variants/Eightpieces.js b/client/src/variants/Eightpieces.js index 21013b8c..8c08b6ae 100644 --- a/client/src/variants/Eightpieces.js +++ b/client/src/variants/Eightpieces.js @@ -17,6 +17,7 @@ export const VariantRules = class EightpiecesRules extends ChessRules { return ChessRules.PIECES.concat([V.JAILER, V.SENTRY, V.LANCER]); } + // Lancer directions *from white perspective* static get LANCER_DIRS() { return { 'c': [-1, 0], //north @@ -71,6 +72,8 @@ export const VariantRules = class EightpiecesRules extends ChessRules { super.setOtherVariables(fen); // subTurn == 2 only when a sentry moved, and is about to push something this.subTurn = 1; + // Pushing sentry position, updated after each push (subTurn == 1) + this.sentryPos = { x: -1, y: -1 }; // Stack pieces' forbidden squares after a sentry move at each turn const parsedFen = V.ParseFen(fen); if (parsedFen.sentrypush == "-") this.sentryPush = [null]; @@ -99,7 +102,13 @@ export const VariantRules = class EightpiecesRules extends ChessRules { // Shuffle pieces on first (and last rank if randomness == 2) for (let c of ["w", "b"]) { if (c == 'b' && randomness == 1) { - pieces['b'] = pieces['w']; + const lancerIdx = pieces['w'].findIndex(p => { + return Object.keys(V.LANCER_DIRS).includes(p); + }); + pieces['b'] = + pieces['w'].slice(0, lancerIdx) + .concat(['g']) + .concat(pieces['w'].slice(lancerIdx + 1)); break; } @@ -222,6 +231,43 @@ export const VariantRules = class EightpiecesRules extends ChessRules { return null; } + // Because of the lancers, getPiece() could be wrong: + // use board[x][y][1] instead (always valid). + getBasicMove([sx, sy], [ex, ey], tr) { + let mv = new Move({ + appear: [ + new PiPo({ + x: ex, + y: ey, + c: tr ? tr.c : this.getColor(sx, sy), + p: tr ? tr.p : this.board[sx][sy][1] + }) + ], + vanish: [ + new PiPo({ + x: sx, + y: sy, + c: this.getColor(sx, sy), + p: this.board[sx][sy][1] + }) + ] + }); + + // The opponent piece disappears if we take it + if (this.board[ex][ey] != V.EMPTY) { + mv.vanish.push( + new PiPo({ + x: ex, + y: ey, + c: this.getColor(ex, ey), + p: this.board[ex][ey][1] + }) + ); + } + + return mv; + } + getPotentialMovesFrom_aux([x, y]) { switch (this.getPiece(x, y)) { case V.JAILER: @@ -238,50 +284,106 @@ export const VariantRules = class EightpiecesRules extends ChessRules { getPotentialMovesFrom([x,y]) { if (this.subTurn == 1) { if (!!this.isImmobilized([x, y])) return []; - return this.getPotentialMovesFrom_aux([x, y]); + let moves = this.getPotentialMovesFrom_aux([x, y]); + const L = this.sentryPush.length; + if (!!this.sentryPush[L-1]) { + // Delete moves walking back on sentry push path + moves = moves.filter(m => { + if ( + m.vanish[0].p != V.PAWN && + this.sentryPush[L-1].some(sq => sq.x == m.end.x && sq.y == m.end.y) + ) { + return false; + } + return true; + }); + } + return moves; } // subTurn == 2: only the piece pushed by the sentry is allowed to move, // as if the sentry didn't exist if (x != this.sentryPos.x && y != this.sentryPos.y) return []; - return this.getPotentialMovesFrom_aux([x, y]); + const moves2 = this.getPotentialMovesFrom_aux([x, y]); + // Don't forget to re-add the sentry on the board: + const oppCol = V.GetOppCol(this.turn); + return moves2.map(m => { + m.appear.push({x: x, y: y, p: V.SENTRY, c: oppCol}); + return m; + }); } - getAllValidMoves() { - let moves = super.getAllValidMoves().filter(m => { - // Remove jailer captures - return m.vanish[0].p != V.JAILER || m.vanish.length == 1; - }); - const L = this.sentryPush.length; - if (!!this.sentryPush[L-1] && this.subTurn == 1) { - // Delete moves walking back on sentry push path - moves = moves.filter(m => { - if ( - m.vanish[0].p != V.PAWN && - this.sentryPush[L-1].some(sq => sq.x == m.end.x && sq.y == m.end.y) - ) { - return false; + getPotentialPawnMoves([x, y]) { + const color = this.turn; + let moves = []; + const [sizeX, sizeY] = [V.size.x, V.size.y]; + let shiftX = color == "w" ? -1 : 1; + // Special case of a sentry push: pawn goes in the capturer direction + if (this.subTurn == 2) shiftX *= -1; + const startRank = color == "w" ? sizeX - 2 : 1; + const lastRank = color == "w" ? 0 : sizeX - 1; + + const finalPieces = + x + shiftX == lastRank + ? + [V.ROOK, V.KNIGHT, V.BISHOP, V.QUEEN, V.SENTRY, V.JAILER] + .concat(Object.keys(V.LANCER_DIRS)) + : [V.PAWN]; + if (this.board[x + shiftX][y] == V.EMPTY) { + // One square forward + for (let piece of finalPieces) { + moves.push( + this.getBasicMove([x, y], [x + shiftX, y], { + c: color, + p: piece + }) + ); + } + if ( + x == startRank && + this.board[x + 2 * shiftX][y] == V.EMPTY + ) { + // Two squares jump + moves.push(this.getBasicMove([x, y], [x + 2 * shiftX, y])); + } + } + // Captures + for (let shiftY of [-1, 1]) { + if ( + y + shiftY >= 0 && + y + shiftY < sizeY && + this.board[x + shiftX][y + shiftY] != V.EMPTY && + this.canTake([x, y], [x + shiftX, y + shiftY]) + ) { + for (let piece of finalPieces) { + moves.push( + this.getBasicMove([x, y], [x + shiftX, y + shiftY], { + c: color, + p: piece + }) + ); } - return true; + } + } + + // En passant: no subTurn consideration here (always == 1) + const Lep = this.epSquares.length; + const epSquare = this.epSquares[Lep - 1]; //always at least one element + if ( + !!epSquare && + epSquare.x == x + shiftX && + Math.abs(epSquare.y - y) == 1 + ) { + let enpassantMove = this.getBasicMove([x, y], [epSquare.x, epSquare.y]); + enpassantMove.vanish.push({ + x: x, + y: epSquare.y, + p: "p", + c: this.getColor(x, epSquare.y) }); + moves.push(enpassantMove); } - return moves; - } - filterValid(moves) { - // Disable check tests when subTurn == 2, because the move isn't finished - if (this.subTurn == 2) return moves; - const filteredMoves = super.filterValid(moves); - // If at least one full move made, everything is allowed: - if (this.movesCount >= 2) return filteredMoves; - // Else, forbid check and captures: - const oppCol = V.GetOppCol(this.turn); - return filteredMoves.filter(m => { - if (m.vanish.length == 2 && m.appear.length == 1) return false; - this.play(m); - const res = !this.underCheck(oppCol); - this.undo(m); - return res; - }); + return moves; } // Obtain all lancer moves in "step" direction, @@ -307,12 +409,13 @@ export const VariantRules = class EightpiecesRules extends ChessRules { let moves = []; // Add all lancer possible orientations, similar to pawn promotions. // Except if just after a push: allow all movements from init square then - if (!!this.sentryPath[L-1]) { + const L = this.sentryPush.length; + if (!!this.sentryPush[L-1]) { // Maybe I was pushed - const pl = this.sentryPath[L-1].length; + const pl = this.sentryPush[L-1].length; if ( - this.sentryPath[L-1][pl-1].x == x && - this.sentryPath[L-1][pl-1].y == y + this.sentryPush[L-1][pl-1].x == x && + this.sentryPush[L-1][pl-1].y == y ) { // I was pushed: allow all directions (for this move only), but // do not change direction after moving. @@ -343,7 +446,8 @@ export const VariantRules = class EightpiecesRules extends ChessRules { getPotentialSentryMoves([x, y]) { // The sentry moves a priori like a bishop: let moves = super.getPotentialBishopMoves([x, y]); - // ...but captures are replaced by special move + // ...but captures are replaced by special move, if and only if + // "captured" piece can move now, considered as the capturer unit. moves.forEach(m => { if (m.vanish.length == 2) { // Temporarily cancel the sentry capture: @@ -351,12 +455,24 @@ export const VariantRules = class EightpiecesRules extends ChessRules { m.vanish.pop(); } }); - return moves; + // Can the pushed unit make any move? + this.subTurn = 2; + const fMoves = moves.filter(m => { + V.PlayOnBoard(this.board, m); + let res = + (this.filterValid(this.getPotentialMovesFrom([x, y])).length > 0); + V.UndoOnBoard(this.board, m); + return res; + }); + this.subTurn = 1; + return fMoves; } getPotentialJailerMoves([x, y]) { - // Captures are removed afterward: - return super.getPotentialRookMoves([x, y]); + return super.getPotentialRookMoves([x, y]).filter(m => { + // Remove jailer captures + return m.vanish[0].p != V.JAILER || m.vanish.length == 1; + }); } getPotentialKingMoves([x, y]) { @@ -456,8 +572,70 @@ export const VariantRules = class EightpiecesRules extends ChessRules { return moves; } + filterValid(moves) { + // Disable check tests when subTurn == 2, because the move isn't finished + if (this.subTurn == 2) return moves; + const filteredMoves = super.filterValid(moves); + // If at least one full move made, everything is allowed: + if (this.movesCount >= 2) return filteredMoves; + // Else, forbid check and captures: + const oppCol = V.GetOppCol(this.turn); + return filteredMoves.filter(m => { + if (m.vanish.length == 2 && m.appear.length == 1) return false; + this.play(m); + const res = !this.underCheck(oppCol); + this.undo(m); + return res; + }); + } + updateVariables(move) { - super.updateVariables(move); + const c = this.turn; + const piece = move.vanish[0].p; + const firstRank = c == "w" ? V.size.x - 1 : 0; + + // Update king position + flags + if (piece == V.KING) { + this.kingPos[c][0] = move.appear[0].x; + this.kingPos[c][1] = move.appear[0].y; + this.castleFlags[c] = [false, false]; + return; + } + + // Update castling flags if rook or jailer moved (or is captured) + const oppCol = V.GetOppCol(c); + const oppFirstRank = V.size.x - 1 - firstRank; + let flagIdx = 0; + if ( + // Our rook moves? + move.start.x == firstRank && + this.INIT_COL_ROOK[c] == move.start.y + ) { + if (this.INIT_COL_ROOK[c] > this.INIT_COL_JAILER[c]) flagIdx++; + this.castleFlags[c][flagIdx] = false; + } else if ( + // Our jailer moves? + move.start.x == firstRank && + this.INIT_COL_JAILER[c] == move.start.y + ) { + if (this.INIT_COL_JAILER[c] > this.INIT_COL_ROOK[c]) flagIdx++; + this.castleFlags[c][flagIdx] = false; + } else if ( + // We took opponent's rook? + move.end.x == oppFirstRank && + this.INIT_COL_ROOK[oppCol] == move.end.y + ) { + if (this.INIT_COL_ROOK[oppCol] > this.INIT_COL_JAILER[oppCol]) flagIdx++; + this.castleFlags[oppCol][flagIdx] = false; + } else if ( + // We took opponent's jailer? + move.end.x == oppFirstRank && + this.INIT_COL_JAILER[oppCol] == move.end.y + ) { + if (this.INIT_COL_JAILER[oppCol] > this.INIT_COL_ROOK[oppCol]) flagIdx++; + this.castleFlags[oppCol][flagIdx] = false; + } + if (this.subTurn == 2) { // A piece is pushed: forbid array of squares between start and end // of move, included (except if it's a pawn) @@ -488,24 +666,39 @@ export const VariantRules = class EightpiecesRules extends ChessRules { } else this.sentryPush.push(null); } + // TODO: cleaner (global) update/unupdate variables logic, rename... + unupdateVariables(move) { + super.unupdateVariables(move); + this.sentryPush.pop(); + } + play(move) { move.flags = JSON.stringify(this.aggregateFlags()); this.epSquares.push(this.getEpSquare(move)); V.PlayOnBoard(this.board, move); if (this.subTurn == 1) this.movesCount++; this.updateVariables(move); - // move.sentryPush indicates that sentry is *about to* push - move.sentryPush = (move.appear.length == 0 && move.vanish.length == 1); - // Turn changes only if not a sentry "pre-push" or subTurn == 2 (push) - if (!move.sentryPush || this.subTurn == 2) + if (move.appear.length == 0 && move.vanish.length == 1) { + // The sentry is about to push a piece: + this.sentryPos = { x: move.end.x, y: move.end.y }; + this.subTurn = 2; + } else { + // Turn changes only if not a sentry "pre-push" this.turn = V.GetOppCol(this.turn); + this.subTurn = 1; + const L = this.sentryPush.length; + // Is it a sentry push? (useful for undo) + move.sentryPush = !!this.sentryPush[L-1]; + } } undo(move) { this.epSquares.pop(); this.disaggregateFlags(JSON.parse(move.flags)); V.UndoOnBoard(this.board, move); - if (this.subTurn == 2) this.movesCount--; + const L = this.sentryPush.length; + // Decrement movesCount except if the move is a sentry push + if (!move.sentryPush) this.movesCount--; this.unupdateVariables(move); // Turn changes only if not undoing second part of a sentry push if (!move.sentryPush || this.subTurn == 1)