| 1 | import ChessRules from "/base_rules.js"; |
| 2 | import PiPo from "/utils/PiPo.js"; |
| 3 | |
| 4 | export default class BenedictRules extends ChessRules { |
| 5 | |
| 6 | static get Options() { |
| 7 | return { |
| 8 | select: C.Options.select, |
| 9 | check: [], |
| 10 | styles: [ |
| 11 | "balance", |
| 12 | "cylinder", |
| 13 | "dark", |
| 14 | "doublemove", |
| 15 | "progressive", |
| 16 | "zen" |
| 17 | ] |
| 18 | }; |
| 19 | } |
| 20 | |
| 21 | get hasEnpassant() { |
| 22 | return false; |
| 23 | } |
| 24 | |
| 25 | canTake() { |
| 26 | return false; |
| 27 | } |
| 28 | |
| 29 | // Find potential captures from a square |
| 30 | // follow steps from x,y until something is met. |
| 31 | findAttacks([x, y]) { |
| 32 | const [color, piece] = [this.getColor(x, y), this.getPiece(x, y)]; |
| 33 | const oppCol = C.GetOppCol(color); |
| 34 | let squares = {}; |
| 35 | const specs = this.pieces(color, x, y)[piece]; |
| 36 | const attacks = specs.attack || specs.moves; |
| 37 | for (let a of attacks) { |
| 38 | outerLoop: for (let step of a.steps) { |
| 39 | let [i, j] = [x + step[0], this.computeY(y + step[1])]; |
| 40 | let nbSteps = 1; |
| 41 | while (this.onBoard(i, j) && this.board[i][j] == "") { |
| 42 | if (a.range <= nbSteps++) continue outerLoop; |
| 43 | i += step[0]; |
| 44 | j = this.computeY(j + step[1]); |
| 45 | } |
| 46 | if (this.onBoard(i, j) && this.getColor(i, j) == oppCol) |
| 47 | squares[C.CoordsToSquare({x: i, y: j})] = true; |
| 48 | } |
| 49 | } |
| 50 | return Object.keys(squares); |
| 51 | } |
| 52 | |
| 53 | postProcessPotentialMoves(moves) { |
| 54 | if (moves.length == 0) return moves; |
| 55 | const [x, y] = [moves[0].end.x, moves[0].end.y]; |
| 56 | const color = this.getColor(moves[0].start.x, moves[0].start.y); |
| 57 | const oppCol = C.GetOppCol(color); |
| 58 | moves = super.postProcessPotentialMoves(moves); |
| 59 | moves.forEach(m => { |
| 60 | this.playOnBoard(m); |
| 61 | let attacks; |
| 62 | if (this.options["zen"]) { |
| 63 | let endSquares = {}; |
| 64 | super.getZenCaptures(x, y).forEach(c => { |
| 65 | endSquares[C.CoordsToSquare(c.end)] = true; |
| 66 | }); |
| 67 | attacks = Object.keys(endSquares); |
| 68 | } |
| 69 | else attacks = this.findAttacks([m.end.x, m.end.y]) |
| 70 | this.undoOnBoard(m); |
| 71 | attacks.map(C.SquareToCoords).forEach(a => { |
| 72 | const p = this.getPiece(a.x, a.y); |
| 73 | m.appear.push(new PiPo({x: a.x, y: a.y, c: color, p: p})); |
| 74 | m.vanish.push(new PiPo({x: a.x, y: a.y, c: oppCol, p: p})); |
| 75 | }); |
| 76 | }); |
| 77 | return moves; |
| 78 | } |
| 79 | |
| 80 | // Moves cannot flip our king's color, so (almost) all are valid |
| 81 | filterValid(moves) { |
| 82 | if (this.options["balance"] && [1, 3].includes(this.movesCount)) |
| 83 | return moves.filter(m => m.vanish.every(v => v.p != C.KING)); |
| 84 | return moves; |
| 85 | } |
| 86 | |
| 87 | // Since it's used just for the king, and there are no captures: |
| 88 | underCheck(square, color) { |
| 89 | return false; |
| 90 | } |
| 91 | |
| 92 | }; |