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README.md

@@ -35,6 +35,11 @@ Weiss appears in most rating lists, and can be seen competing at [TCEC](https://
 * #### NoobBook
   Allow Weiss to query and play moves suggested by [noobpwnftw's online opening database](https://www.chessdb.cn/queryc_en/).
 
+* #### NoobBookMode
+  Sets the query mode to use (see [dbcn docs](https://www.chessdb.cn/cloudbookc_api_en.html)):
+    - best - chooses randomly from the moves with scores close to the best. Stops if all moves' scores are below a threshold.
+    - all - chooses the move with the highest score (first in the returned list). Only stops if there are no moves with scores.
+
 * #### NoobBookLimit
   Limit the use of NoobBook to the first x moves of the game. Only relevant with NoobBook set to true.
 

src/noobprobe/noobprobe.c

@@ -26,6 +26,7 @@
 
 
 bool NoobBook;
+bool NoobModeBest = true;
 int NoobLimit;
 int failedQueries;
 
@@ -43,7 +44,8 @@ bool ProbeNoob(Position *pos) {
     puts("info string NoobBook: Querying chessdb.cn for a move...");
 
     // Query dbcn
-    char *msg_fmt = "GET https://www.chessdb.cn/cdb.php?action=querybest&board=%s\n";
+    char *msg_fmt = NoobModeBest ? "GET https://www.chessdb.cn/cdb.php?action=querybest&board=%s\n"
+                                 : "GET https://www.chessdb.cn/cdb.php?action=queryall&board=%s\n";
     char *hostname = "www.chessdb.cn";
     char *response = Query(hostname, msg_fmt, pos);
 
@@ -57,3 +59,12 @@ bool ProbeNoob(Position *pos) {
 
     return failedQueries = 0, true;
 }
+
+void NoobBookSetMode(const char *str) {
+    if (!strncmp(str, "best", strlen("best")))
+        NoobModeBest = true;
+    else if (!strncmp(str, "all", strlen("all")))
+        NoobModeBest = false;
+    else
+        puts("info string NoobBook: Valid modes are 'best' and 'all'");
+}

src/noobprobe/noobprobe.h

@@ -28,3 +28,4 @@ extern int failedQueries;
 
 
 bool ProbeNoob(Position *pos);
+void NoobBookSetMode(const char *str);

src/uci.c

@@ -114,6 +114,7 @@ static void SetOption(char *str) {
     else if (OptionNameIs("SyzygyPath"   )) tb_init(optionValue);
     else if (OptionNameIs("MultiPV"      )) Limits.multiPV = IntValue;
     else if (OptionNameIs("NoobBookLimit")) NoobLimit      = IntValue;
+    else if (OptionNameIs("NoobBookMode" )) NoobBookSetMode(optionValue);
     else if (OptionNameIs("NoobBook"     )) NoobBook       = BooleanValue;
     else if (OptionNameIs("UCI_Chess960" )) Chess960       = BooleanValue;
     else if (OptionNameIs("OnlineSyzygy" )) OnlineSyzygy   = BooleanValue;
@@ -132,6 +133,7 @@ static void Info() {
     printf("option name MultiPV type spin default 1 min 1 max %d\n", MULTI_PV_MAX);
     printf("option name UCI_Chess960 type check default false\n");
     printf("option name NoobBook type check default false\n");
+    printf("option name NoobBookMode string default <best>\n");
     printf("option name NoobBookLimit type spin default 0 min 0 max 1000\n");
     printf("option name OnlineSyzygy type check default false\n");
     printf("uciok\n"); fflush(stdout);