- genRandInitFen(seed) {
- if (this.options["mode"] == "losers")
- return super.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];
+ genRandInitBaseFen() {
+ let setupOpts = {
+ randomness: this.options["randomness"],
+ diffCol: ['b']
+ };
+ if (this.options["mode"] == "losers") {
+ setupOpts["between"] = [{p1: 'k', p2: 'r'}];
+ setupOpts["flags"] = ['r'];