| 1 | import { ChessRules, Move, PiPo } from "@/base_rules"; |
| 2 | |
| 3 | export class CoronationRules extends ChessRules { |
| 4 | |
| 5 | getPotentialMovesFrom([x, y]) { |
| 6 | let moves = super.getPotentialMovesFrom([x, y]); |
| 7 | // If no queen on board, allow rook+bishop fusions: |
| 8 | const color = this.turn; |
| 9 | const piece = this.getPiece(x, y); |
| 10 | if ( |
| 11 | [V.ROOK, V.BISHOP].includes(piece) && |
| 12 | this.board.every(b => b.every(cell => |
| 13 | (cell == V.EMPTY || cell[0] != color || cell[1] != V.QUEEN) |
| 14 | )) |
| 15 | ) { |
| 16 | const fusionWith = [V.ROOK, V.BISHOP][1 - "rb".indexOf(piece)]; |
| 17 | // Can I "self-capture" fusionWith ? |
| 18 | for (let step of V.steps[piece]) { |
| 19 | let [i, j] = [x + step[0], y + step[1]]; |
| 20 | while (V.OnBoard(i, j) && this.board[i][j] == V.EMPTY) { |
| 21 | i += step[0]; |
| 22 | j += step[1]; |
| 23 | } |
| 24 | if ( |
| 25 | V.OnBoard(i, j) && |
| 26 | this.getColor(i, j) == color && |
| 27 | this.getPiece(i, j) == fusionWith |
| 28 | ) { |
| 29 | moves.push( |
| 30 | new Move({ |
| 31 | appear: [new PiPo({ x: i, y: j, p: V.QUEEN, c: color })], |
| 32 | vanish: [ |
| 33 | new PiPo({ x: x, y: y, p: piece, c: color }), |
| 34 | new PiPo({ x: i, y: j, p: fusionWith, c: color }) |
| 35 | ] |
| 36 | }) |
| 37 | ); |
| 38 | } |
| 39 | } |
| 40 | } |
| 41 | return moves; |
| 42 | } |
| 43 | |
| 44 | getNotation(move) { |
| 45 | let notation = super.getNotation(move); |
| 46 | if (move.appear[0].p == V.QUEEN && move.vanish[0].p != V.QUEEN) |
| 47 | // Coronation |
| 48 | notation += "=Q"; |
| 49 | return notation; |
| 50 | } |
| 51 | |
| 52 | }; |