move read_openbook()
{
int i, value;
long move_str;
move mv;
hash_node hash_temp;
move *pbook_move;
int temp_value[MAX_BOOK_MOVE];
#if 0
if ((int)move_str) {
/* do nothing */
}
#endif
hash_temp = hash_table[zobrist_key & hash_mask];
if ((hash_temp.type & BOOK_EXIST) != 0 &&
hash_temp.checksum == zobrist_key_check) {
if ((hash_temp.type & BOOK_UNIQUE) != 0) {
move_str = move_to_str(hash_temp.goodmove);
return hash_temp.goodmove;
} else {
value = 0;
pbook_move = book_move_array[hash_temp.value];
for (i = 0; i < hash_temp.depth; i++) {
mv = pbook_move[i];
move_str = move_to_str(mv);
value += mv.capture;
temp_value[i] = value;
}
if (value > 0) {
value = rand32() % value;
for (i = 0; i < hash_temp.depth; i++) {
if (value < temp_value[i]) {
break;
}
}
return pbook_move[i];
} else {
mv = NULL_MOVE;
return mv;
}
}
} else {
mv = NULL_MOVE;
return mv;
}
}
static void print_move_info(move_t mv, int ply) {
char buf[MAX_CHARS_IN_MOVE];
move_to_str(mv, buf, MAX_CHARS_IN_MOVE);
printf("info");
for (int i = 0; i < ply; ++i) {
printf(" ----");
}
printf(" %s\n", buf);
}
/* Choose the best move (by searching or using the book), and make it. */
static void
cpu_move(Chess *chess)
{
bool book_used = false;
char san_move[MAX_BUF];
char str_move[MAX_BUF];
U32 move = NULLMOVE;
int score = 0;
S64 timer;
Board *board;
ASSERT(1, chess != NULL);
board = &chess->board;
timer = get_ms();
chess->sd.cmd_type = CMDT_CONTINUE;
if (settings.book_type != BOOK_OFF)
move = get_book_move(board, chess->show_pv, chess->book);
if (move != NULLMOVE) {
book_used = true;
chess->in_book = true;
} else {
score = id_search(chess, NULLMOVE);
if (chess->sd.cmd_type == CMDT_CANCEL) {
chess->cpu_color = COLOR_NONE;
return;
}
move = chess->sd.move;
chess->in_book = false;
}
timer = get_ms() - timer;
ASSERT(1, move != NULLMOVE);
move_to_str(move, str_move);
if (SIGN(board->color)*score < VAL_RESIGN) {
if (board->color == WHITE)
printf("0-1 {White resigns}\n");
else
printf("1-0 {Black resigns}\n");
chess->game_over = true;
return;
}
printf("move %s\n", str_move);
if (chess->debug && chess->sd.nnodes > 0) {
print_search_data(&chess->sd, (int)timer);
printf("Score: %d\n", score);
}
move_to_san(san_move, board, move);
update_game_log(board, san_move, score, book_used);
update_game(chess, move);
}
static void getPV(move_t *pv, char *buf, size_t bufsize) {
buf[0] = 0;
for (int i = 0; i < (MAX_PLY_IN_SEARCH - 1) && pv[i] != 0; i++) {
char a[MAX_CHARS_IN_MOVE];
move_to_str(pv[i], a, MAX_CHARS_IN_MOVE);
if (i != 0) {
strncat(buf, " ", bufsize - strlen(buf) - 1); // - 1, for the terminating '\0'
}
strncat(buf, a, bufsize - strlen(buf) - 1); // - 1, for the terminating '\0'
}
}
void UCI()
{
char str[8192];
char *p;
printf("id name chess\n");
printf("id author komendart\n");
printf("uciok\n");
fflush(stdout);
while(1)
{
gets(str);
p = strtok(str, " ");
if(!p)
{
continue;
}
else if(!strcmp(p, "quit"))
{
return;
}
else if(!strcmp(p, "isready"))
{
printf("readyok\n");
fflush(stdout);
}
else if(!strcmp(p, "position"))
{
p = strtok(0, " ");
if(!strcmp(p, "fen"))
{
p = strtok(0, "m");
setup_position(p);
}
else
{
setup_position(start_fen);
}
if (p = strtok(0, " "))
{
while(p = strtok(0, " "))
{
Move m = str_to_move(p);
make_move(m);
}
}
}
else if(!strcmp(p, "go"))
{
int depth_limit = 8;
while (p = strtok(0, " "))
{
if(!strcmp(p, "depth"))
{
p = strtok(0, " ");
depth_limit = atoi(p);
}
}
Move move = search(depth_limit);
char tmp[6];
move_to_str(move, tmp);
sprintf(str, "bestmove %s\n", tmp);
printf(str);
fflush(stdout);
}
}
}
