bool is_insufficient_material_draw(const libchess::Position & pos)
{
       if (pos.piece_type_bb(libchess::constants::PAWN, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::PAWN, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::ROOK, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::ROOK, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::QUEEN, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::QUEEN, libchess::constants::WHITE).popcount())
               return false;

       if (pos.piece_type_bb(libchess::constants::KNIGHT, libchess::constants::WHITE).popcount() ||
              pos.piece_type_bb(libchess::constants::KNIGHT, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::BISHOP, libchess::constants::WHITE).popcount() ||
               pos.piece_type_bb(libchess::constants::BISHOP, libchess::constants::WHITE).popcount())
               return false;

       return true;
}