Fix games ordering in MyGames, fix en-passant mistake in Rifle variant
[vchess.git] / client / src / variants / Atomic.js
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1import { ChessRules, PiPo } from "@/base_rules";
2
6808d7a1 3export const VariantRules = class AtomicRules extends ChessRules {
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4 getEpSquare(moveOrSquare) {
5 if (typeof moveOrSquare !== "object" || move.appear.length > 0)
6 return super.getEpSquare(moveOrSquare);
7 // Capturing move: no en-passant
8 return undefined;
9 }
10
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11 getPotentialMovesFrom([x, y]) {
12 let moves = super.getPotentialMovesFrom([x, y]);
0c3fe8a6 13
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14 // Handle explosions
15 moves.forEach(m => {
8b405c81 16 // NOTE: if vanish.length==2 and appear.length==2, this is castle
6808d7a1 17 if (m.vanish.length > 1 && m.appear.length <= 1) {
8b405c81 18 // Explosion! (TODO?: drop moves which explode our king here)
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19 let steps = [
20 [-1, -1],
21 [-1, 0],
22 [-1, 1],
23 [0, -1],
24 [0, 1],
25 [1, -1],
26 [1, 0],
27 [1, 1]
28 ];
29 for (let step of steps) {
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30 let x = m.end.x + step[0];
31 let y = m.end.y + step[1];
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32 if (
33 V.OnBoard(x, y) &&
34 this.board[x][y] != V.EMPTY &&
35 this.getPiece(x, y) != V.PAWN
36 ) {
dac39588 37 m.vanish.push(
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38 new PiPo({
39 p: this.getPiece(x, y),
40 c: this.getColor(x, y),
41 x: x,
42 y: y
43 })
44 );
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45 }
46 }
6808d7a1 47 m.end = { x: m.appear[0].x, y: m.appear[0].y };
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48 m.appear.pop(); //Nothin appears in this case
49 }
50 });
0c3fe8a6 51
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52 return moves;
53 }
0c3fe8a6 54
6808d7a1 55 getPotentialKingMoves([x, y]) {
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56 // King cannot capture:
57 let moves = [];
58 const steps = V.steps[V.ROOK].concat(V.steps[V.BISHOP]);
6808d7a1 59 for (let step of steps) {
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60 const i = x + step[0];
61 const j = y + step[1];
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62 if (V.OnBoard(i, j) && this.board[i][j] == V.EMPTY)
63 moves.push(this.getBasicMove([x, y], [i, j]));
dac39588 64 }
6808d7a1 65 return moves.concat(this.getCastleMoves([x, y]));
dac39588 66 }
0c3fe8a6 67
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68 isAttacked(sq, colors) {
69 if (
70 this.getPiece(sq[0], sq[1]) == V.KING &&
71 this.isAttackedByKing(sq, colors)
72 )
dac39588 73 return false; //king cannot take...
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74 return (
75 this.isAttackedByPawn(sq, colors) ||
76 this.isAttackedByRook(sq, colors) ||
77 this.isAttackedByKnight(sq, colors) ||
78 this.isAttackedByBishop(sq, colors) ||
79 this.isAttackedByQueen(sq, colors)
80 );
dac39588 81 }
0c3fe8a6 82
6808d7a1 83 updateVariables(move) {
dac39588 84 super.updateVariables(move);
6808d7a1 85 if (move.appear.length == 0) {
e9b736ee 86 // Capture
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87 const firstRank = { w: 7, b: 0 };
88 for (let c of ["w", "b"]) {
dac39588 89 // Did we explode king of color c ? (TODO: remove move earlier)
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90 if (
91 Math.abs(this.kingPos[c][0] - move.end.x) <= 1 &&
92 Math.abs(this.kingPos[c][1] - move.end.y) <= 1
93 ) {
94 this.kingPos[c] = [-1, -1];
95 this.castleFlags[c] = [false, false];
96 } else {
dac39588 97 // Now check if init rook(s) exploded
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98 if (Math.abs(move.end.x - firstRank[c]) <= 1) {
99 if (Math.abs(move.end.y - this.INIT_COL_ROOK[c][0]) <= 1)
dac39588 100 this.castleFlags[c][0] = false;
6808d7a1 101 if (Math.abs(move.end.y - this.INIT_COL_ROOK[c][1]) <= 1)
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102 this.castleFlags[c][1] = false;
103 }
104 }
105 }
106 }
107 }
0c3fe8a6 108
6808d7a1 109 unupdateVariables(move) {
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110 super.unupdateVariables(move);
111 const c = move.vanish[0].c;
112 const oppCol = V.GetOppCol(c);
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113 if (
114 [this.kingPos[c][0], this.kingPos[oppCol][0]].some(e => {
115 return e < 0;
116 })
117 ) {
dac39588 118 // There is a chance that last move blowed some king away..
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119 for (let psq of move.vanish) {
120 if (psq.p == "k")
121 this.kingPos[psq.c == c ? c : oppCol] = [psq.x, psq.y];
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122 }
123 }
124 }
0c3fe8a6 125
6808d7a1 126 underCheck(color) {
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127 const oppCol = V.GetOppCol(color);
128 let res = undefined;
129 // If our king disappeared, move is not valid
6808d7a1 130 if (this.kingPos[color][0] < 0) res = true;
dac39588 131 // If opponent king disappeared, move is valid
6808d7a1 132 else if (this.kingPos[oppCol][0] < 0) res = false;
dac39588 133 // Otherwise, if we remain under check, move is not valid
6808d7a1 134 else res = this.isAttacked(this.kingPos[color], [oppCol]);
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135 return res;
136 }
0c3fe8a6 137
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138 getCheckSquares(color) {
139 let res = [];
140 if (
141 this.kingPos[color][0] >= 0 && //king might have exploded
142 this.isAttacked(this.kingPos[color], [V.GetOppCol(color)])
143 ) {
144 res = [JSON.parse(JSON.stringify(this.kingPos[color]))];
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145 }
146 return res;
147 }
0c3fe8a6 148
6808d7a1 149 getCurrentScore() {
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150 const color = this.turn;
151 const kp = this.kingPos[color];
6808d7a1 152 if (kp[0] < 0)
e9b736ee 153 // King disappeared
dac39588 154 return color == "w" ? "0-1" : "1-0";
6808d7a1 155 if (this.atLeastOneMove())
0c3fe8a6 156 return "*";
6808d7a1 157 if (!this.isAttacked(kp, [V.GetOppCol(color)])) return "1/2";
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158 return color == "w" ? "0-1" : "1-0"; //checkmate
159 }
6808d7a1 160};