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Add pos negamax function

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Bruno Raoult
2023-07-07 15:53:26 +02:00
parent 531bfa4fb0
commit 7952a34c88
5 changed files with 102 additions and 13 deletions
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36
src/move.c
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@@ -62,6 +62,20 @@ void moves_pool_stats()
pool_stats(moves_pool);
}
/**
* move_print() - print a move
* @movenum: move number
* @move: &move to display
* @flags: options to display
*
* Possible flags are:
* M_PR_CAPT: print move if capture
* M_PR_NCAPT: print move if non capture
* M_PR_NUM: print also move number
* M_PR_LONG: print long notation
*
* @return: 0 if nothing printed, 1 otherwise
*/
int move_print(int movenum, move_t *move, move_flags_t flags)
{
if (flags & M_PR_CAPT && !(move->flags & M_CAPTURE)) {
@@ -88,10 +102,10 @@ int move_print(int movenum, move_t *move, move_flags_t flags)
printf("%s%c%c", P_SYM(move->piece),
FILE2C(F88(move->from)),
RANK2C(R88(move->from)));
if (move->taken) {
if (move->flags & M_CAPTURE) {
printf("x");
if (flags & M_PR_LONG)
printf("%s", P_SYM(move->taken));
printf("%s", P_SYM(move->capture));
} else {
printf("-");
}
@@ -172,9 +186,9 @@ static move_t *move_add(pos_t *pos, piece_t piece, square_t from,
move->piece = piece;
move->from = from;
move->to = to;
move->taken = board[to].piece;
move->capture = board[to].piece;
move->flags = M_NORMAL;
if (move->taken)
if (move->capture)
move->flags |= M_CAPTURE;
# ifdef DEBUG_MOVE
log_i(3, "added move from %c%c to %c%c\n",
@@ -336,10 +350,10 @@ int pseudo_moves_pawn(pos_t *pos, piece_list_t *ppiece, bool doit)
# endif
if (sq_file == ep_file - 1 || sq_file == ep_file + 1) {
square_t t_square = SQ88(ep_file, rank5); /* taken pawn square */
piece_t taken = board[t_square].piece;
piece_t captured = board[t_square].piece;
move = move_pawn_add(pos, piece | color , square, pos->en_passant, rank7);
move->flags |= M_EN_PASSANT | M_CAPTURE;
move->taken = taken;
move->capture = captured;
pos->mobility[color]++;
count++;
}
@@ -668,11 +682,7 @@ pos_t *move_do(pos_t *pos, move_t *move)
int color = COLOR(piece);
square_t from = move->from, to = move->to;
/* todo: en passant, castle
*/
SET_COLOR(new->turn, OPPONENT(color)); /* pos color */
if (move->taken || PIECE(piece) == PAWN) /* 50 moves */
if (move->capture || PIECE(piece) == PAWN) /* 50 moves */
new->clock_50 = 0;
else
new->clock_50++;
@@ -739,12 +749,14 @@ pos_t *move_do(pos_t *pos, move_t *move)
new->board[from].piece = 0;
new->board[from].s_piece = NULL;
SET_COLOR(new->turn, OPPONENT(color)); /* pos color */
return new;
}
void move_undo(pos_t *pos, __unused move_t *move)
{
pos_clear(pos);
pos_del(pos);
}
#ifdef BIN_move