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eval: add functions to get eval details

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This commit is contained in:
Bruno Raoult
2023-06-25 15:56:36 +02:00
parent 373a73cb52
commit 5bd8f9042a
2 changed files with 53 additions and 41 deletions
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76
src/eval.c
View File

@@ -18,20 +18,14 @@
#include "eval.h" #include "eval.h"
eval_t eval(pos_t *pos) inline eval_t eval_material(pos_t *pos, bool color)
{ {
eval_t material[2] = {0};
eval_t control[2] = {0};
eval_t res = 0; eval_t res = 0;
//printf("val(%d-%c) = %lu\n", PAWN, P_LETTER(PAWN), P_VALUE(PAWN)); /* I need to do something about the king, if it can be potentially taken
//printf("val(%d-%c) = %lu\n", KNIGHT, P_LETTER(KNIGHT), P_VALUE(KNIGHT)); * if pseudo-moves include a pinned piece on King.
//bitboard_print2(pos->bb[0][BB_PAWN], pos->bb[1][BB_PAWN]);
//bitboard_print2(pos->bb[0][BB_QUEEN], pos->bb[1][BB_QUEEN]);
/* 1) pieces value
*/ */
for (uint color = 0; color < 2; ++color) { for (uint piece = PAWN; piece < KING; piece <<= 1) {
for (uint piece = PAWN; piece <= KING; piece <<= 1) {
uint bb = PIECETOBB(piece); uint bb = PIECETOBB(piece);
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "color=%u piece=%u bb=%u=%c count=%ul val=%ld\n", log_f(2, "color=%u piece=%u bb=%u=%c count=%ul val=%ld\n",
@@ -39,43 +33,57 @@ eval_t eval(pos_t *pos)
P_VALUE(piece)); P_VALUE(piece));
# endif # endif
/* attention here */ /* attention here */
material[color] += popcount64(pos->bb[color][bb]) * P_VALUE(piece); res += popcount64(pos->bb[color][bb]) * P_VALUE(piece);
}
} }
return res;
}
inline eval_t eval_mobility(pos_t *pos, bool color)
{
return popcount64(pos->controlled[color]);
}
inline eval_t eval_square_control(pos_t *pos, bool color)
{
return pos->mobility[color];
}
eval_t eval(pos_t *pos)
{
eval_t material[2] = {0}, control[2] = {0};
/* 1) pieces value */
material[WHITE] = eval_material(pos, WHITE);
material[BLACK] = eval_material(pos, BLACK);
res = material[WHITE] - material[BLACK];
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "material: W:%ld B:%ld eval=%ld (%.3f pawns)\n", log_f(2, "material: W:%d B:%d diff=%d\n",
material[WHITE], material[BLACK], material[WHITE], material[BLACK], material[WHITE] - material[BLACK]);
material[WHITE] - material[BLACK], (float)res/100);
# endif # endif
/* 2) square control: 10 square controls diff = 1 pawn /* 2) square control: 10 square controls diff = 1 pawn */
*/ control[WHITE] = eval_square_control(pos, WHITE);
control[WHITE] = popcount64(pos->controlled[WHITE]); control[BLACK] = eval_square_control(pos, BLACK);
control[BLACK] = popcount64(pos->controlled[BLACK]);
res = control[WHITE] - control[BLACK];
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "square control: W:%ld B:%ld eval=%ld (%.3f pawns)\n", log_f(2, "square control: W:%d B:%d diff=%d\n",
control[WHITE], control[BLACK], control[WHITE], control[BLACK],
res, (float)res/10); (control[WHITE] - control[BLACK]) * 10);
# endif # endif
/* 3) mobility: 10 mobility diff = 1 pawn /* 3) mobility: 10 mobility diff = 1 pawn
*/ */
res = pos->mobility[WHITE] - pos->mobility[BLACK];
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "mobility: W:%ud B:%ud eval=%ld (%.3f pawns)\n", log_f(2, "mobility: W:%u B:%u diff=%d\n",
pos->mobility[WHITE], pos->mobility[BLACK], pos->mobility[WHITE], pos->mobility[BLACK],
res, (float)res/5); (pos->mobility[WHITE] - pos->mobility[BLACK]) * 10);
# endif # endif
res = material[WHITE] - material[BLACK] + eval_t res = material[WHITE] - material[BLACK] +
(control[WHITE] - control[BLACK]) * 10 + (control[WHITE] - control[BLACK]) * 10 +
(pos->mobility[WHITE] - pos->mobility[BLACK]) * 20; (pos->mobility[WHITE] - pos->mobility[BLACK]) * 10;
# ifdef DEBUG_EVAL # ifdef DEBUG_EVAL
log_f(2, "eval: %ld (%.3f pawns)\n", log_f(2, "eval: %d\n", res);
res, (float)res/100);
# endif # endif
return res; return res;
@@ -90,7 +98,7 @@ int main(int ac, char**av)
pos_t *pos; pos_t *pos;
eval_t res; eval_t res;
debug_level_set(9); debug_init(5);
piece_pool_init(); piece_pool_init();
moves_pool_init(); moves_pool_init();
pos_pool_init(); pos_pool_init();
@@ -106,12 +114,12 @@ int main(int ac, char**av)
pos_pieces_print(pos); pos_pieces_print(pos);
moves_gen(pos, OPPONENT(pos->turn), false); moves_gen(pos, OPPONENT(pos->turn), false);
moves_print(pos, M_PR_SEPARATE); //moves_print(pos, M_PR_SEPARATE);
//pos_print(pos); //pos_print(pos);
//pos_pieces_print(pos); //pos_pieces_print(pos);
moves_gen(pos, pos->turn, false); moves_gen(pos, pos->turn, true);
moves_print(pos, M_PR_SEPARATE); moves_print(pos, M_PR_SEPARATE);
res = eval(pos); res = eval(pos);
printf("eval=%ld (%.3f pawns)\n", res, (float)res/100); printf("eval=%d centipawns)\n", res);
} }
#endif #endif

4
src/eval.h
View File

@@ -16,6 +16,10 @@
#include "position.h" #include "position.h"
eval_t eval_material(pos_t *pos, bool color);
eval_t eval_mobility(pos_t *pos, bool color);
eval_t eval_square_control(pos_t *pos, bool color);
eval_t eval(pos_t *pos); eval_t eval(pos_t *pos);
#endif /* EVAL_H */ #endif /* EVAL_H */