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eval: basic mobility

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Bruno Raoult
2021-11-12 11:00:11 +01:00
parent 6832cdf32a
commit 37271bdd77
1 changed files with 36 additions and 17 deletions
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53
src/eval.c
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@@ -19,39 +19,57 @@
eval_t eval(pos_t *pos) eval_t eval(pos_t *pos)
{ {
eval_t eval[2] = {0}, res = 0; eval_t material[2] = {0};
eval_t control[2] = {0};
eval_t res = 0;
struct list_head *p_cur, *p_tmp, *list; struct list_head *p_cur, *p_tmp, *list;
piece_list_t *piece; piece_list_t *piece;
/* 1) pieces value /* 1) pieces value
*/ */
for (int color=WHITE; color <=BLACK; ++color) { for (int color=0; color <2; ++color) {
list = &pos->pieces[color]; list = &pos->pieces[color];
list_for_each_safe(p_cur, p_tmp, list) { list_for_each_safe(p_cur, p_tmp, list) {
piece = list_entry(p_cur, piece_list_t, list); piece = list_entry(p_cur, piece_list_t, list);
eval[color] += piece->value; if (PIECE(piece->piece) != KING)
material[color] += piece->value;
} }
} }
res += eval[WHITE] - eval[BLACK]; res = material[WHITE] - material[BLACK];
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "pieces: W:%lu B:%lu diff=%lu eval=\n", eval[WHITE], eval[BLACK], log_f(2, "material: W:%ld B:%ld eval=%ld (%.3f pawns)\n",
res); material[WHITE], material[BLACK],
material[WHITE] - material[BLACK], (float)res/100);
# endif # endif
/* 2) square control /* 2) square control: 10 square controls diff = 1 pawn
*/ */
eval[WHITE] = popcount64(pos->controlled[WHITE]); control[WHITE] = popcount64(pos->controlled[WHITE]);
eval[BLACK] = popcount64(pos->controlled[BLACK]); control[BLACK] = popcount64(pos->controlled[BLACK]);
res += eval[WHITE] - eval[BLACK]; res = control[WHITE] - control[BLACK];
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "square control: W:%lu B:%lu eval=%lu\n", eval[WHITE], eval[BLACK], log_f(2, "square control: W:%ld B:%ld eval=%ld (%.3f pawns)\n",
res); control[WHITE], control[BLACK],
res, (float)res/10);
# endif # endif
/* 3) mobility /* 3) mobility: 5 mobility diff = 1 pawn
*/ */
res = pos->mobility[WHITE] - pos->mobility[BLACK];
# ifdef DEBUG_EVAL
log_f(2, "mobility: W:%ld B:%ld eval=%ld (%.3f pawns)\n",
pos->mobility[WHITE], pos->mobility[BLACK],
res, (float)res/5);
# endif
res = material[WHITE] - material[BLACK] +
(control[WHITE] - control[BLACK]) * 10 +
(pos->mobility[WHITE] - pos->mobility[BLACK]) * 20;
# ifdef DEBUG_EVAL
log_f(2, "eval: %ld (%.3f pawns)\n",
res, (float)res/100);
# endif
return res; return res;
} }
@@ -63,6 +81,7 @@ eval_t eval(pos_t *pos)
int main(int ac, char**av) int main(int ac, char**av)
{ {
pos_t *pos; pos_t *pos;
eval_t res;
debug_init(2); debug_init(2);
piece_pool_init(); piece_pool_init();
@@ -75,11 +94,11 @@ int main(int ac, char**av)
fen2pos(pos, av[1]); fen2pos(pos, av[1]);
} }
moves_gen(pos, WHITE); moves_gen(pos, OPPONENT(pos->turn), false);
moves_gen(pos, BLACK); moves_gen(pos, pos->turn, true);
pos_print(pos); pos_print(pos);
pos_pieces_print(pos); pos_pieces_print(pos);
res = eval(pos);
printf("eval=%lu\n", eval(pos)); printf("eval=%ld (%.3f pawns)\n", res, (float)res/100);
} }
#endif #endif