Print reversible plies done in stead of plies to go

Printing the number of plies left to the draw-adjudication point was
confusing when the N-move rule was set to a non-standard value.
In stead we now print the number of plies since the last irreversible
move, so the user can compare it to both the engine claim point (100)
and the adjudication point he set (which might be beyond 100).

diff --git a/engineoutput.c b/engineoutput.c
index 46b34a3..78117a7 100644 (file)
--- a/engineoutput.c
+++ b/engineoutput.c
@@ -76,20 +76,22 @@ static char header[MSG_SIZ];
 #define MAX_VAR 400
 static int scores[MAX_VAR], textEnd[MAX_VAR], curDepth[2], nrVariations[2];
 
+extern int initialRulePlies;
+
 void MakeEngineOutputTitle()
 {
        static char buf[MSG_SIZ];
        static char oldTitle[MSG_SIZ];
        char *title = "Engine Output";
-      extern int initialRulePlies;
-       int count;
+       int count, rule = 2*appData.ruleMoves;
        // figure out value of 50-move counter
        count = currentMove;
        while( (signed char)boards[count][EP_STATUS] <= EP_NONE && count > backwardMostMove ) count--;
        if( count == backwardMostMove ) count -= initialRulePlies;
-       count += 2*appData.ruleMoves - currentMove;
-       snprintf(buf, MSG_SIZ, "%s (%d ply to draw)", title, count);
-       if(count <= 40) title = buf;
+       count = currentMove - count;
+       snprintf(buf, MSG_SIZ, "%s (%d reversible plies)", title, count);
+       if(!rule) rule = 100;
+       if(count >= rule - 40 && !appData.icsActive) title = buf;
        if(!strcmp(oldTitle, title)) return;
        safeStrCpy(oldTitle, title, MSG_SIZ);
        SetEngineOutputTitle(title);