bruno/brchess
1
0
Fork 0
Code Issues 9 Projects Releases Wiki Activity

is_legal: fix check+pinned and knight check; perft-test + perft2()

Browse Source
This commit is contained in:
Bruno Raoult
2024-03-26 17:37:18 +01:00
parent 7637bdad10
commit 08ba989170
7 changed files with 457 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
src/search.c
View File

@@ -18,10 +18,11 @@
#include "position.h"
#include "move-gen.h"
#include "move-do.h"
#include "search.h"
#include "attack.h"
//#include "move.h"
//#include "eval.h"
//#include "search.h"
/**
* perft() - Perform perft on position
@@ -36,22 +37,22 @@
*/
u64 perft(pos_t *pos, int depth, int ply)
{
int movetmp = 0, nodes = 0, subnodes, nmove = 0;
int subnodes, nmove = 0;
u64 nodes = 0;
movelist_t pseudo = { .nmoves = 0 }, legal = { .nmoves = 0 };
move_t move;
if (depth == 0)
return 1;
pos->checkers = pos_checkers(pos, pos->turn);
pos->pinners = pos_king_pinners(pos, pos->turn);
pos->blockers = pos_king_blockers(pos, pos->turn, pos->pinners);
pos_set_pinners_blockers(pos);
pos_gen_pseudomoves(pos, &pseudo);
pos_all_legal(pos, &pseudo, &legal);
//for (nmove = 0; nmove < legal.nmoves; ++nmove ) {
while ((move = pos_next_legal(pos, &pseudo, &movetmp)) != MOVE_NONE) {
for (nmove = 0; nmove < legal.nmoves; ++nmove ) {
//while ((move = pos_next_legal(pos, &pseudo, &movetmp)) != MOVE_NONE) {
//printf("depth=%d movetmp=%d\n", depth, movetmp);
state_t state;
move = legal.move[nmove];
move_do(pos, move, &state);
@@ -64,7 +65,45 @@ u64 perft(pos_t *pos, int depth, int ply)
move_undo(pos, move, &state);
}
if (ply == 1)
printf("Total: %d\n", nodes);
printf("\nTotal: %lu\n", nodes);
return nodes;
}
u64 perft2(pos_t *pos, int depth, int ply)
{
int subnodes, nmove = 0;
u64 nodes = 0;
movelist_t pseudo = { .nmoves = 0 };
move_t move;
if (is_in_check(pos, OPPONENT(pos->turn)))
return 0;
if (depth == 0)
return 1;
pos->checkers = pos_checkers(pos, pos->turn);
pos->pinners = pos_king_pinners(pos, pos->turn);
pos->blockers = pos_king_blockers(pos, pos->turn, pos->pinners);
pos_gen_pseudomoves(pos, &pseudo);
//pos_all_legal(pos, &pseudo, &legal);
for (nmove = 0; nmove < pseudo.nmoves; ++nmove ) {
//while ((move = pos_next_legal(pos, &pseudo, &movetmp)) != MOVE_NONE) {
//printf("depth=%d movetmp=%d\n", depth, movetmp);
state_t state;
move = pseudo.move[nmove];
move_do(pos, move, &state);
subnodes = perft2(pos, depth - 1, ply + 1);
if (ply == 1) {
char movestr[8];
printf("%s: %d\n", move_str(movestr, move, 0), subnodes);
}
nodes += subnodes;
move_undo(pos, move, &state);
}
if (ply == 1)
printf("\nTotal: %lu\n", nodes);
return nodes;
}