Fix blocking of input in ponder games

The blocking of input during thinking did break pondering, as a ponder
miss also used pause = 2 to schedule ignoring of the 'bestmove' reply
to 'stop'. This now uses pause = 1 again, while after a ponder hit the
input thread is blocked after turning pause into 2, indicating the
'bestmove' is for real.

diff --git a/UCI2WB.c b/UCI2WB.c
index 856ada3..9f1ad06 100644 (file)
--- a/UCI2WB.c
+++ b/UCI2WB.c
@@ -157,7 +157,7 @@ void
 StopPonder(int pondering)\r
 {\r
        if(!pondering) return;\r
-       pause = 2;\r
+       pause = 1;\r
        fprintf(toE, "stop\n"); fflush(toE); DPRINT("# stop\n"); // note: 'pondering' remains set until engine acknowledges 'stop' with 'bestmove'\r
        Sync(PAUSE); // wait for engine to acknowledge 'stop' with 'bestmove'.\r
 }\r
@@ -417,6 +417,7 @@ GUI2Engine()
                    char *draw = drawOffer ? " draw" : ""; drawOffer = 0;\r
                    pondering = 0; moveNr++; startTime = GetTickCount(); // clock starts running now\r
                    fprintf(toE, "ponderhit%s\n", draw); DPRINT("# ponderhit%s\n", draw);\r
+                   fflush(toE); fflush(stdout); pause = 2; Sync(PAUSE); // block input during thinking\r
                    goto nomove;\r
                }\r
                StopPonder(1);\r