+import { Pandemonium2Rules } from "@/variants/Pandemonium2";
+
+export class Pandemonium1Rules extends Pandemonium2Rules {
+
+ static get PawnSpecs() {
+ return Object.assign(
+ { },
+ Pandemonium2Rules.PawnSpecs,
+ { threeSquares: true }
+ );
+ }
+
+ static get size() {
+ return { x: 10, y: 10};
+ }
+
+ static IsGoodEnpassant(enpassant) {
+ if (enpassant != "-") {
+ const squares = enpassant.split(",");
+ if (squares.length > 2) return false;
+ for (let sq of squares) {
+ if (!sq.match(/[a-j0-9]/)) return false;
+ }
+ }
+ return true;
+ }
+
+ static GenRandInitFen(randomness) {
+ const baseFen = Pandemonium2Rules.GenRandInitFen(randomness)
+ return baseFen.substr(0, 22) + "91/91/" + baseFen.substr(22);
+ }
+
+ getEnpassantFen() {
+ const L = this.epSquares.length;
+ if (!this.epSquares[L - 1]) return "-"; //no en-passant
+ let res = "";
+ this.epSquares[L - 1].forEach(sq => {
+ res += V.CoordsToSquare(sq) + ",";
+ });
+ return res.slice(0, -1); //remove last comma
+ }
+
+ getEpSquare(moveOrSquare) {
+ if (!moveOrSquare) return undefined;
+ if (typeof moveOrSquare === "string") {
+ const square = moveOrSquare;
+ if (square == "-") return undefined;
+ let res = [];
+ square.split(",").forEach(sq => {
+ res.push(V.SquareToCoords(sq));
+ });
+ return res;
+ }
+ // Argument is a move:
+ const move = moveOrSquare;
+ const [sx, sy, ex] = [move.start.x, move.start.y, move.end.x];
+ if (this.getPiece(sx, sy) == V.PAWN && Math.abs(sx - ex) >= 2) {
+ const step = (ex - sx) / Math.abs(ex - sx);
+ let res = [{
+ x: sx + step,
+ y: sy
+ }];
+ if (sx + 2 * step != ex) {
+ // 3-squares jump
+ res.push({
+ x: sx + 2 * step,
+ y: sy
+ });
+ }
+ return res;
+ }
+ return undefined; //default
+ }
+
+ applyPromotions(moves, promoted) {
+ const lastRanks = (this.turn == 'w' ? [0, 1] : [V.size.x - 1, V.size.x]);
+ let promotions = [];
+ moves.forEach(m => {
+ if (lastRanks.includes(m.start.x) || lastRanks.includes(m.end.x)) {
+ let pMove = JSON.parse(JSON.stringify(m));
+ pMove.appear[0].p = promoted;
+ promotions.push(pMove);
+ }
+ });
+ Array.prototype.push.apply(moves, promotions);
+ }
+
+ addPawnMoves([x1, y1], [x2, y2], moves) {
+ const color = this.turn;
+ const lastRanks = (color == "w" ? [0, 1] : [V.size.x - 1, V.size.x - 2]);
+ if (!lastRanks.includes(x2)) {
+ moves.push(this.getBasicMove([x1, y1], [x2, y2]));
+ return;
+ }
+ let finalPieces = [V.GILDING];
+ if (x2 == lastRanks[1]) finalPieces.push(V.PAWN);
+ for (let piece of finalPieces) {
+ const tr = (piece != V.PAWN ? { c: color, p: piece } : null);
+ moves.push(this.getBasicMove([x1, y1], [x2, y2], tr));
+ }
+ }
+
+ getEnpassantCaptures([x, y], shiftX) {
+ const Lep = this.epSquares.length;
+ const epSquare = this.epSquares[Lep - 1];
+ let moves = [];
+ if (!!epSquare) {
+ for (let epsq of epSquare) {
+ // TODO: some redundant checks
+ if (epsq.x == x + shiftX && Math.abs(epsq.y - y) == 1) {
+ let enpassantMove = this.getBasicMove([x, y], [epsq.x, epsq.y]);
+ // WARNING: the captured pawn may be diagonally behind us,
+ // if it's a 3-squares jump and we take on 1st passing square
+ const px = this.board[x][epsq.y] != V.EMPTY ? x : x - shiftX;
+ enpassantMove.vanish.push({
+ x: px,
+ y: epsq.y,
+ p: "p",
+ c: this.getColor(px, epsq.y)
+ });
+ moves.push(enpassantMove);
+ }
+ }
+ }
+ return moves;
+ }
+
+};
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