sub_match& operator=(const sub_match& that)
{
this->first = that.first;
this->second = that.second;
matched = that.matched;
#ifdef BOOST_REGEX_MATCH_EXTRA
if(that.m_captures)
get_captures() = *(that.m_captures);
#endif
return *this;
}
int Search::capture_quiescence_eval_search(bool white_turn, int alpha, int beta, Board& board) {
if (board.b[WHITE][KING] == 0) {
return -10000;
} else if (board.b[BLACK][KING] == 0) {
return 10000;
}
int static_eval = evaluate(board);
if (static_eval > alpha && white_turn) {
return static_eval;
}
if (static_eval < beta && !white_turn) {
return static_eval;
}
MoveList capture_moves = get_captures(board, white_turn);
if (capture_moves.empty()) {
// the end point of the quiescence search
return static_eval;
}
for (unsigned int i = 0; i < capture_moves.size(); ++i) {
pick_next_move(capture_moves, i);
Move move = capture_moves[i];
quiescence_node_count++;
make_move(board, move);
int res = capture_quiescence_eval_search(!white_turn, alpha, beta, board);
unmake_move(board, move);
if (res > alpha && white_turn) {
alpha = res;
}
if (res < beta && !white_turn) {
beta = res;
}
if (beta <= alpha || time_to_stop()) {
break;
}
}
if (white_turn) {
return alpha;
}
return beta;
}
