Commit | Line | Data |
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3955246a BA |
1 | import { ChessRules, Move, PiPo } from "@/base_rules"; |
2 | import { Cannibal1Rules } from "@/variants/Cannibal1"; | |
3 | ||
4 | export class Cannibal2Rules extends Cannibal1Rules { | |
5 | ||
6 | // Trim all non-capturing moves | |
7 | static KeepCaptures(moves) { | |
8 | return moves.filter(m => m.vanish.length == 2 && m.appear.length == 1); | |
9 | } | |
10 | ||
11 | // Stop at the first capture found (if any) | |
12 | atLeastOneCapture() { | |
13 | const color = this.turn; | |
14 | const oppCol = V.GetOppCol(color); | |
15 | for (let i = 0; i < V.size.x; i++) { | |
16 | for (let j = 0; j < V.size.y; j++) { | |
17 | if ( | |
18 | this.board[i][j] != V.EMPTY && | |
19 | this.getColor(i, j) != oppCol && | |
20 | this.filterValid(this.getPotentialMovesFrom([i, j])).some(m => | |
21 | // Warning: discard castle moves | |
22 | m.vanish.length == 2 && m.appear.length == 1) | |
23 | ) { | |
24 | return true; | |
25 | } | |
26 | } | |
27 | } | |
28 | return false; | |
29 | } | |
30 | ||
31 | addPawnMoves([x1, y1], [x2, y2], moves) { | |
32 | let finalPieces = [V.PAWN]; | |
33 | const color = this.turn; | |
34 | const lastRank = (color == "w" ? 0 : V.size.x - 1); | |
35 | if (x2 == lastRank) { | |
36 | if (this.board[x2][y2] != V.EMPTY) | |
37 | // Cannibal rules: no choice if capture | |
38 | finalPieces = [this.getPiece(x2, y2)]; | |
39 | else finalPieces = V.PawnSpecs.promotions; | |
40 | } | |
41 | let tr = null; | |
42 | for (let piece of finalPieces) { | |
43 | tr = (piece != V.PAWN ? { c: color, p: piece } : null); | |
44 | moves.push(this.getBasicMove([x1, y1], [x2, y2], tr)); | |
45 | } | |
46 | } | |
47 | ||
48 | getPossibleMovesFrom(sq) { | |
49 | let moves = this.filterValid(this.getPotentialMovesFrom(sq)); | |
50 | const captureMoves = V.KeepCaptures(moves); | |
51 | if (captureMoves.length > 0) return captureMoves; | |
52 | if (this.atLeastOneCapture()) return []; | |
53 | return moves; | |
54 | } | |
55 | ||
56 | getAllValidMoves() { | |
57 | const moves = super.getAllValidMoves(); | |
58 | if (moves.some(m => m.vanish.length == 2 && m.appear.length == 1)) | |
59 | return V.KeepCaptures(moves); | |
60 | return moves; | |
61 | } | |
62 | ||
63 | }; |