static GenRandInitFen(randomness) {
// Remove the en-passant + castle part of the FEN
let fen = ChessRules.GenRandInitFen(randomness).slice(0, -6);
static GenRandInitFen(randomness) {
// Remove the en-passant + castle part of the FEN
let fen = ChessRules.GenRandInitFen(randomness).slice(0, -6);