| 1 | import { ChessRules } from "@/base_rules"; |
| 2 | import { ArrayFun } from "@/utils/array"; |
| 3 | import { shuffle } from "@/utils/alea"; |
| 4 | |
| 5 | export class FootballRules extends ChessRules { |
| 6 | static get HasFlags() { |
| 7 | return false; |
| 8 | } |
| 9 | |
| 10 | static get PawnSpecs() { |
| 11 | return Object.assign( |
| 12 | {}, |
| 13 | ChessRules.PawnSpecs, |
| 14 | { promotions: ChessRules.PawnSpecs.promotions.concat([V.KING]) } |
| 15 | ); |
| 16 | } |
| 17 | |
| 18 | static get Lines() { |
| 19 | return [ |
| 20 | // White goal: |
| 21 | [[0, 3], [0, 5]], |
| 22 | [[0, 5], [1, 5]], |
| 23 | [[1, 5], [1, 3]], |
| 24 | [[1, 3], [0, 3]], |
| 25 | // Black goal: |
| 26 | [[8, 3], [8, 5]], |
| 27 | [[8, 5], [7, 5]], |
| 28 | [[7, 5], [7, 3]], |
| 29 | [[7, 3], [8, 3]] |
| 30 | ]; |
| 31 | } |
| 32 | |
| 33 | static IsGoodPosition(position) { |
| 34 | if (position.length == 0) return false; |
| 35 | const rows = position.split("/"); |
| 36 | if (rows.length != V.size.x) return false; |
| 37 | // Just check that at least one piece of each color is there: |
| 38 | let pieces = { "w": 0, "b": 0 }; |
| 39 | for (let row of rows) { |
| 40 | let sumElts = 0; |
| 41 | for (let i = 0; i < row.length; i++) { |
| 42 | const lowerRi = row[i].toLowerCase(); |
| 43 | if (V.PIECES.includes(lowerRi)) { |
| 44 | pieces[row[i] == lowerRi ? "b" : "w"]++; |
| 45 | sumElts++; |
| 46 | } else { |
| 47 | const num = parseInt(row[i], 10); |
| 48 | if (isNaN(num)) return false; |
| 49 | sumElts += num; |
| 50 | } |
| 51 | } |
| 52 | if (sumElts != V.size.y) return false; |
| 53 | } |
| 54 | if (Object.values(pieces).some(v => v == 0)) return false; |
| 55 | return true; |
| 56 | } |
| 57 | |
| 58 | scanKings() {} |
| 59 | |
| 60 | filterValid(moves) { |
| 61 | return moves; |
| 62 | } |
| 63 | |
| 64 | getCheckSquares() { |
| 65 | return []; |
| 66 | } |
| 67 | |
| 68 | // No variables update because no royal king + no castling |
| 69 | prePlay() {} |
| 70 | postPlay() {} |
| 71 | preUndo() {} |
| 72 | postUndo() {} |
| 73 | |
| 74 | getCurrentScore() { |
| 75 | const oppCol = V.GetOppCol(this.turn); |
| 76 | const goal = (oppCol == 'w' ? 0 : 7); |
| 77 | if (this.board[goal].slice(3, 5).some(b => b[0] == oppCol)) |
| 78 | return oppCol == 'w' ? "1-0" : "0-1"; |
| 79 | if (this.atLeastOneMove()) return "*"; |
| 80 | return "1/2"; |
| 81 | } |
| 82 | |
| 83 | static GenRandInitFen(randomness) { |
| 84 | if (randomness == 0) |
| 85 | return "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w 0 -"; |
| 86 | |
| 87 | let pieces = { w: new Array(8), b: new Array(8) }; |
| 88 | for (let c of ["w", "b"]) { |
| 89 | if (c == 'b' && randomness == 1) { |
| 90 | pieces['b'] = pieces['w']; |
| 91 | break; |
| 92 | } |
| 93 | |
| 94 | // Get random squares for every piece, totally freely |
| 95 | let positions = shuffle(ArrayFun.range(8)); |
| 96 | const composition = ['b', 'b', 'r', 'r', 'n', 'n', 'k', 'q']; |
| 97 | const rem2 = positions[0] % 2; |
| 98 | if (rem2 == positions[1] % 2) { |
| 99 | // Fix bishops (on different colors) |
| 100 | for (let i=2; i<8; i++) { |
| 101 | if (positions[i] % 2 != rem2) |
| 102 | [positions[1], positions[i]] = [positions[i], positions[1]]; |
| 103 | } |
| 104 | } |
| 105 | for (let i = 0; i < 8; i++) pieces[c][positions[i]] = composition[i]; |
| 106 | } |
| 107 | return ( |
| 108 | pieces["b"].join("") + |
| 109 | "/pppppppp/8/8/8/8/PPPPPPPP/" + |
| 110 | pieces["w"].join("").toUpperCase() + |
| 111 | // En-passant allowed, but no flags |
| 112 | " w 0 -" |
| 113 | ); |
| 114 | } |
| 115 | }; |