| 1 | import { ChessRules } from "@/base_rules"; |
| 2 | import { CoregalRules } from "@/variants/Coregal"; |
| 3 | |
| 4 | export class TwokingsRules extends CoregalRules { |
| 5 | static get PawnSpecs() { |
| 6 | return Object.assign( |
| 7 | {}, |
| 8 | ChessRules.PawnSpecs, |
| 9 | { promotions: ChessRules.PawnSpecs.promotions.concat([V.KING]) } |
| 10 | ); |
| 11 | } |
| 12 | |
| 13 | static IsGoodPosition(position) { |
| 14 | if (position.length == 0) return false; |
| 15 | const rows = position.split("/"); |
| 16 | if (rows.length != V.size.x) return false; |
| 17 | let kings = { "w": 0, "b": 0 }; |
| 18 | for (let row of rows) { |
| 19 | let sumElts = 0; |
| 20 | for (let i = 0; i < row.length; i++) { |
| 21 | if (['K','k'].includes(row[i])) kings[row[i]]++; |
| 22 | if (V.PIECES.includes(row[i].toLowerCase())) sumElts++; |
| 23 | else { |
| 24 | const num = parseInt(row[i]); |
| 25 | if (isNaN(num)) return false; |
| 26 | sumElts += num; |
| 27 | } |
| 28 | } |
| 29 | if (sumElts != V.size.y) return false; |
| 30 | } |
| 31 | // Two kings (at least) per side should be present: |
| 32 | if (Object.values(kings).some(v => v < 2)) return false; |
| 33 | return true; |
| 34 | } |
| 35 | |
| 36 | // Not scanning king positions. In this variant, scan the board everytime. |
| 37 | scanKings(fen) {} |
| 38 | |
| 39 | getCheckSquares(color) { |
| 40 | let squares = []; |
| 41 | const oppCol = V.GetOppCol(color); |
| 42 | for (let i=0; i<V.size.x; i++) { |
| 43 | for (let j=0; j<V.size.y; j++) { |
| 44 | if ( |
| 45 | this.getColor(i, j) == color && |
| 46 | this.getPiece(i, j) == V.KING && |
| 47 | this.isAttacked([i, j], oppCol) |
| 48 | ) { |
| 49 | squares.push([i, j]); |
| 50 | } |
| 51 | } |
| 52 | } |
| 53 | return squares; |
| 54 | } |
| 55 | |
| 56 | static GenRandInitFen(randomness) { |
| 57 | const fen = CoregalRules.GenRandInitFen(randomness); |
| 58 | return fen.replace("q", "k").replace("Q", "K"); |
| 59 | } |
| 60 | |
| 61 | underCheck(color) { |
| 62 | const oppCol = V.GetOppCol(color); |
| 63 | for (let i=0; i<V.size.x; i++) { |
| 64 | for (let j=0; j<V.size.y; j++) { |
| 65 | if ( |
| 66 | this.getColor(i, j) == color && |
| 67 | this.getPiece(i, j) == V.KING && |
| 68 | this.isAttacked([i, j], oppCol) |
| 69 | ) { |
| 70 | return true; |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | return false; |
| 75 | } |
| 76 | |
| 77 | postPlay(move) { |
| 78 | const piece = move.vanish[0].p; |
| 79 | super.updateCastleFlags(move, piece, "twoKings"); |
| 80 | } |
| 81 | |
| 82 | postUndo() {} |
| 83 | }; |