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add UCI "perft_alt" command

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Bruno Raoult
2024-06-24 08:52:23 +02:00
parent 0c2d30c938
commit cfa8b42077
1 changed files with 13 additions and 5 deletions
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18
src/brchess.c
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@@ -61,7 +61,7 @@ struct command commands[] = {
{ "position", do_position, "position startpos|fen [moves ...]" }, { "position", do_position, "position startpos|fen [moves ...]" },
{ "perft", do_perft, "(not UCI) perft [divide] depth" }, { "perft", do_perft, "(not UCI) perft [divide] [alt] depth" },
{ "moves", do_moves, "(not UCI) moves ..." }, { "moves", do_moves, "(not UCI) moves ..." },
{ "diagram", do_diagram, "(not UCI) print current position diagram" }, { "diagram", do_diagram, "(not UCI) print current position diagram" },
@@ -318,17 +318,25 @@ int do_diagram(pos_t *pos, __unused char *arg)
int do_perft(__unused pos_t *pos, __unused char *arg) int do_perft(__unused pos_t *pos, __unused char *arg)
{ {
char *saveptr, *token; char *saveptr, *token;
int divide = 0, depth = 6; int divide = 0, depth = 6, alt = 0;
token = strtok_r(arg, " ", &saveptr); token = strtok_r(arg, " ", &saveptr);
if (!strcmp(token, "divide")) { if (!strcmp(token, "divide")) {
divide = 1; divide = 1;
token = strtok_r(NULL, " ", &saveptr); token = strtok_r(NULL, " ", &saveptr);
} }
if (!strcmp(token, "alt")) {
alt = 1;
token = strtok_r(NULL, " ", &saveptr);
}
depth = atoi(token); depth = atoi(token);
printf("perft: divide=%d depth=%d\n", divide, depth); printf("perft: divide=%d alt=%d depth=%d\n", divide, alt, depth);
if (depth > 0) if (depth > 0) {
perft(pos, depth, 1, divide); if (!alt)
perft(pos, depth, 1, divide);
else
perft_alt(pos, depth, 1, divide);
}
return 1; return 1;
} }