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