-
- let pieces = { w: new Array(6), b: new Array(6) };
- // Shuffle pieces on first (and last rank if randomness == 2)
- for (let c of ["w", "b"]) {
- if (c == 'b' && this.options["randomness"] == 1) {
- pieces['b'] = pieces['w'];
- break;
- }
-
- let positions = ArrayFun.range(6);
-
- // Get random squares for bishops
- let randIndex = 2 * Random.randInt(3);
- const bishop1Pos = positions[randIndex];
- let randIndex_tmp = 2 * Random.randInt(3) + 1;
- const bishop2Pos = positions[randIndex_tmp];
- positions.splice(Math.max(randIndex, randIndex_tmp), 1);
- positions.splice(Math.min(randIndex, randIndex_tmp), 1);
-
- // Get random square for queens
- randIndex = Random.randInt(4);
- const queen1Pos = positions[randIndex];
- positions.splice(randIndex, 1);
- randIndex = Random.randInt(3);
- const queen2Pos = positions[randIndex];
- positions.splice(randIndex, 1);
-
- // Rooks positions are now fixed,
- const rook1Pos = positions[0];
- const rook2Pos = positions[1];
-
- pieces[c][rook1Pos] = "r";
- pieces[c][bishop1Pos] = "b";
- pieces[c][queen1Pos] = "q";
- pieces[c][queen2Pos] = "q";
- pieces[c][bishop2Pos] = "b";
- pieces[c][rook2Pos] = "r";
- }
-
- return (
- pieces["b"].join("") + "/" +
- pieces["b"].map(p => piece2pawn[p]).join("") +