+import ChessRules from "/base_rules.js";
+import { ArrayFun } from "/utils/array.js";
+import { Random } from "/utils/alea.js";
+
+export default class GiveawayRules extends ChessRules {
+
+ static get Options() {
+ return {
+ select: [
+ {
+ label: "Mode",
+ variable: "mode",
+ defaut: "suicide",
+ options: [
+ {label: "Suicide", value: "suicide"},
+ {label: "Losers", value: "losers"}
+ ]
+ }
+ ].concat(C.Options.select),
+ input: C.Options.input.filter(i => i.variable == "pawnfall"),
+ styles: [
+ "atomic", "cannibal", "cylinder", "dark",
+ "madrasi", "rifle", "teleport", "zen"
+ ]
+ };
+ }
+
+ get hasFlags() {
+ return this.options["mode"] == "losers";
+ }
+
+ get pawnPromotions() {
+ let res = ['q', 'r', 'n', 'b'];
+ if (this.options["mode"] == "suicide")
+ res.push('k');
+ return res;
+ }
+
+ genRandInitFen(seed) {
+ if (this.options["randomness"] == 0) {
+ return (
+ 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w 0 {"enpassant":"-"}'
+ );
+ }
+
+ Random.setSeed(seed);
+ let pieces = { w: new Array(8), b: new Array(8) };
+ for (let c of ["w", "b"]) {
+ if (c == 'b' && this.options["randomness"] == 1) {
+ pieces['b'] = pieces['w'];
+ break;
+ }
+
+ // Get random squares for every piece, totally freely
+ let positions = Random.shuffle(ArrayFun.range(8));
+ const composition = ['b', 'b', 'r', 'r', 'n', 'n', 'k', 'q'];
+ const rem2 = positions[0] % 2;
+ if (rem2 == positions[1] % 2) {
+ // Fix bishops (on different colors)
+ for (let i=2; i<8; i++) {
+ if (positions[i] % 2 != rem2) {
+ [positions[1], positions[i]] = [positions[i], positions[1]];
+ break;
+ }
+ }
+ }
+ for (let i = 0; i < 8; i++)
+ pieces[c][positions[i]] = composition[i];
+ }
+ return (
+ pieces["b"].join("") +
+ "/pppppppp/8/8/8/8/PPPPPPPP/" +
+ pieces["w"].join("").toUpperCase() +
+ // En-passant allowed, but no flags
+ ' w 0 {"enpassant":"-"}'
+ );
+ }
+
+ constructor(o) {
+ o.options["capture"] = true;
+ super(o);
+ }
+
+ underCheck([x, y], oppCol) {
+ if (this.options["mode"] == "suicide")
+ return false;
+ return super.underCheck([x, y], oppCol);
+ }
+
+ getCurrentScore() {
+ if (this.atLeastOneMove()) return "*";
+ // No valid move: the side who cannot move wins
+ return (this.turn == "w" ? "1-0" : "0-1");
+ }
+
+};