void SEARCHER::do_move(const int& move) {
int from = m_from(move),to = m_to(move),sq;
/*remove captured piece*/
if(m_capture(move)) {
if(is_ep(move)) {
sq = to - pawn_dir[player];
} else {
sq = to;
}
pcRemove(m_capture(move),sq);
board[sq] = empty;
}
/*move piece*/
if(m_promote(move)) {
board[to] = m_promote(move);
board[from] = empty;
pcAdd(m_promote(move),to);
pcRemove(COMBINE(player,pawn),from);
} else {
board[to] = board[from];
board[from] = empty;
pcSwap(from,to);
}
/*move castle*/
if(is_castle(move)) {
int fromc,toc;
if(to > from) {
fromc = to + RR;
toc = to + LL;
} else {
fromc = to + 2*LL;
toc = to + RR;
}
board[toc] = board[fromc];
board[fromc] = empty;
pcSwap(fromc,toc);
}
/*update current state*/
epsquare = 0;
fifty++;
if(DECOMB(player,m_piece(move)) == pawn) {
fifty = 0;
if(to - from == (2 * pawn_dir[player])) {
epsquare = ((to + from) >> 1);
}
void print_move(const int& move) {
char f[6],t[6];
sq_str(m_from(move),f);
sq_str(m_to(move),t);
print("%s %s %c %c %c ep = %d",f,t,piece_name[m_piece(move)],
piece_name[m_capture(move)],piece_name[m_promote(move)],is_ep(move));
}
