| 1 | import { ChessRules } from "@/base_rules"; |
| 2 | |
| 3 | export class HordeRules extends ChessRules { |
| 4 | |
| 5 | static get Options() { |
| 6 | return { |
| 7 | check: [ |
| 8 | { |
| 9 | label: "Random", |
| 10 | defaut: false, |
| 11 | variable: "random" |
| 12 | } |
| 13 | ] |
| 14 | }; |
| 15 | } |
| 16 | |
| 17 | static get HasFlags() { |
| 18 | return false; |
| 19 | } |
| 20 | |
| 21 | static IsGoodPosition() { |
| 22 | // At least one white unit, and exactly one black king: |
| 23 | if (position.length == 0) return false; |
| 24 | const rows = position.split("/"); |
| 25 | if (rows.length != V.size.x) return false; |
| 26 | let things = { "k": 0, "w": false }; |
| 27 | for (let row of rows) { |
| 28 | let sumElts = 0; |
| 29 | for (let i = 0; i < row.length; i++) { |
| 30 | if (row[i] == 'k') things['k']++; |
| 31 | if (V.PIECES.includes(row[i].toLowerCase())) { |
| 32 | const rowCharCode = row[i].charCodeAt(0); |
| 33 | if (rowCharCode >= 65 && rowCharCode <= 90) { |
| 34 | // No white king: |
| 35 | if (row[i] == 'K') return false; |
| 36 | if (!things['w']) things['w'] = true; |
| 37 | } |
| 38 | sumElts++; |
| 39 | } else { |
| 40 | const num = parseInt(row[i], 10); |
| 41 | if (isNaN(num)) return false; |
| 42 | sumElts += num; |
| 43 | } |
| 44 | } |
| 45 | if (sumElts != V.size.y) return false; |
| 46 | } |
| 47 | if (things[''] != 1 || !things['w']) return false; |
| 48 | return true; |
| 49 | } |
| 50 | |
| 51 | static GenRandInitFen(options) { |
| 52 | const fen = |
| 53 | ChessRules.GenRandInitFen({ randomness: (options.random ? 1 : 0) }); |
| 54 | return ( |
| 55 | // 20 first chars are 3 rows + 3 slashes |
| 56 | fen.substr(0, 20) |
| 57 | // En passant available, but no castle: |
| 58 | .concat("1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP w 0 -") |
| 59 | ); |
| 60 | } |
| 61 | |
| 62 | filterValid(moves) { |
| 63 | if (this.turn == 'w') return moves; |
| 64 | return super.filterValid(moves); |
| 65 | } |
| 66 | |
| 67 | getCheckSquares() { |
| 68 | if (this.turn == 'w') return []; |
| 69 | return ( |
| 70 | this.underCheck('b') |
| 71 | ? [JSON.parse(JSON.stringify(this.kingPos['b']))] |
| 72 | : [] |
| 73 | ); |
| 74 | } |
| 75 | |
| 76 | getCurrentScore() { |
| 77 | if (this.turn == 'w') { |
| 78 | // Do I have any unit remaining? If not, I lost. |
| 79 | // If yes and no available move, draw. |
| 80 | let somethingRemains = false; |
| 81 | outerLoop: for (let i=0; i<8; i++) { |
| 82 | for (let j=0; j<8; j++) { |
| 83 | if (this.board[i][j] != V.EMPTY && this.getColor(i, j) == 'w') { |
| 84 | somethingRemains = true; |
| 85 | break outerLoop; |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | if (!somethingRemains) return "0-1"; |
| 90 | if (this.atLeastOneMove()) return "*"; |
| 91 | return "1/2"; |
| 92 | } |
| 93 | // From black side, just run usual checks: |
| 94 | return super.getCurrentScore(); |
| 95 | } |
| 96 | |
| 97 | }; |