| 1 | import ChessRules from "/base_rules.js"; |
| 2 | import AbstractAntikingRules from "/variants/_Antiking/class.js"; |
| 3 | |
| 4 | export default class Antiking1Rules extends AbstractAntikingRules { |
| 5 | |
| 6 | get hasCastle() { |
| 7 | return false; |
| 8 | } |
| 9 | get hasEnpassant() { |
| 10 | return false; |
| 11 | } |
| 12 | |
| 13 | pieces(color, x, y) { |
| 14 | const pawnShift = (color == "w" ? -1 : 1); |
| 15 | let res = super.pieces(color, x, y); |
| 16 | res['p'].moves = [ |
| 17 | { |
| 18 | steps: [[pawnShift, 1], [pawnShift, -1]], |
| 19 | range: 1 |
| 20 | } |
| 21 | ]; |
| 22 | res['p'].attack = [ |
| 23 | { |
| 24 | steps: [[pawnShift, 0]], |
| 25 | range: 1 |
| 26 | } |
| 27 | ]; |
| 28 | return res; |
| 29 | } |
| 30 | |
| 31 | genRandInitBaseFen() { |
| 32 | // Always deterministic setup |
| 33 | return { |
| 34 | fen: "2prbkqA/2p1nnbr/2pppppp/8/8/PPPPPP2/RBNN1P2/aQKBRP2 w 0", |
| 35 | o: {"flags": "KAka"} |
| 36 | }; |
| 37 | } |
| 38 | |
| 39 | // (Anti)King flags at 1 (true) if they can knight-jump |
| 40 | setFlags(fenflags) { |
| 41 | this.kingFlags = { w: {}, b: {} }; |
| 42 | for (let i=0; i<fenflags.length; i++) { |
| 43 | const white = fenflags.charCodeAt(i) <= 90; |
| 44 | const curChar = fenflags.charAt(i).toLowerCase(); |
| 45 | this.kingFlags[white ? 'w' : 'b'][curChar] = true; |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | getFlagsFen() { |
| 50 | return ( |
| 51 | Array.prototype.concat.apply( |
| 52 | ['w', 'b'].map(c => { |
| 53 | const res = Object.keys(this.kingFlags[c]).join(""); |
| 54 | return (c == 'w' ? res.toUpperCase() : res); |
| 55 | }) |
| 56 | ).join("") |
| 57 | ); |
| 58 | } |
| 59 | |
| 60 | getPotentialMovesFrom([x, y]) { |
| 61 | const color = this.turn; |
| 62 | let moves = super.getPotentialMovesFrom([x, y]); |
| 63 | if (this.kingFlags[color][this.getPiece(x, y)]) { |
| 64 | // Allow knight jump (king or antiking) |
| 65 | const knightMoves = super.getPotentialMovesOf('n', [x, y]); |
| 66 | // Remove captures (TODO: could be done more efficiently...) |
| 67 | moves = moves.concat(knightMoves.filter(m => m.vanish.length == 1)); |
| 68 | } |
| 69 | return moves; |
| 70 | } |
| 71 | |
| 72 | prePlay(move) { |
| 73 | super.prePlay(move); |
| 74 | // Update king+antiking flags |
| 75 | const piece = move.vanish[0].p; |
| 76 | if (this.isKing(0, 0, piece)) |
| 77 | delete this.kingFlags[move.vanish[0].c][piece]; |
| 78 | } |
| 79 | |
| 80 | }; |