Try only recaptures in qsearch if depth is very low

[stockfish] / src / types.h

diff --git a/src/types.h b/src/types.h
index 345751455dbf54d853a88dd874eea367ecd58e35..d02755c1adcbd46eeb83f8c1bb89f8eb87198a6f 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -201,9 +201,10 @@ enum Depth {
 
   ONE_PLY = 2,
 
-  DEPTH_ZERO         =  0 * ONE_PLY,
-  DEPTH_QS_CHECKS    = -1 * ONE_PLY,
-  DEPTH_QS_NO_CHECKS = -2 * ONE_PLY,
+  DEPTH_ZERO          =  0 * ONE_PLY,
+  DEPTH_QS_CHECKS     = -1 * ONE_PLY,
+  DEPTH_QS_NO_CHECKS  = -2 * ONE_PLY,
+  DEPTH_QS_RECAPTURES = -4 * ONE_PLY,
 
   DEPTH_NONE = -127 * ONE_PLY
 };