-record(board_bb, {
    black_king_bitboard :: bitboard:bitboard(),
    black_queen_bitboard :: bitboard:bitboard(),
    black_rook_bitboard :: bitboard:bitboard(),
    black_bishop_bitboard :: bitboard:bitboard(),
    black_knight_bitboard :: bitboard:bitboard(),
    black_pawns_bitboard :: bitboard:bitboard(),
    white_king_bitboard :: bitboard:bitboard(),
    white_queen_bitboard :: bitboard:bitboard(),
    white_rook_bitboard :: bitboard:bitboard(),
    white_bishop_bitboard :: bitboard:bitboard(),
    white_knight_bitboard :: bitboard:bitboard(),
    white_pawns_bitboard :: bitboard:bitboard()
}).