🚀 go-pugleaf

Apparently, the inclusion of CheckEETable() in eval.c resulted
in a bug in evaluate(), causing ScoreLoneKing() never been called.
Thus, the special endgame abilities of GNU chess are not active.

This patch will cure the bug, though now CheckEETable() is never
called when a lone king is on the board, but the evaluations under
ScoreLoneKing() aren't excessive, anyway.  Maybe someone other
with more knowledge could fix this...


--- eval.c~	Tue Jun 22 15:49:32 1993
+++ eval.c	Tue Jun 29 11:12:36 1993
@@ -663,13 +663,12 @@
 	  (mtl[black] == valueK && (pmtl[white] == 0 || emtl[white] == 0)));
 
 	      /* should we use the estimete or score the position */
-	if ( ply == 1 ||
+	if (!slk && (ply == 1 ||
 #ifdef CACHE
     	(CheckEETable (side)) ||
 #endif
-	slk || 
 	(Sdepth ==  ply) || 
-        (ply > Sdepth && (s >= (alpha - 30) && s <= (beta + 30)) ))
+        (ply > Sdepth && (s >= (alpha - 30) && s <= (beta + 30)) )))
 	
       {
 	  /* score the position */


--
--| Ralf Stephan, Augsburg, Bavaria, Germany |-------| ralf@ark.abg.sub.org |-
--| GO  d* -p+ c++ l++ m* s--/+ g++ w++ t r+ |-------| ..and she was black. |-