X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fdepth.h;h=d0d0943c23e4a8eebb596e210e9258fa44e64830;hp=9822289a9abff566f5c11068f3566496d056c02e;hb=27393ebae2e689c86f77777d3ba9aae39b9c89b8;hpb=5c81602d14539f8259a715477315e28b5de7cb54

diff --git a/src/depth.h b/src/depth.h
index 9822289a..d0d0943c 100644
--- a/src/depth.h
+++ b/src/depth.h
@@ -35,9 +35,6 @@ enum Depth {
 //// Constants
 ////
 
-/// Note: If OnePly is changed, the constant HistoryMax in history.h should
-/// probably also be changed.
-
 const Depth OnePly = Depth(2);
 
 
@@ -51,7 +48,8 @@ inline void operator+= (Depth &d, int i) { d = Depth(int(d) + i); }
 inline void operator+= (Depth &d1, Depth d2) { d1 += int(d2); }
 inline Depth operator- (Depth d, int i) { return Depth(int(d) - i); }
 inline Depth operator- (Depth d1, Depth d2) { return Depth(int(d1) - int(d2)); }
-inline void operator-= (Depth & d, int i) { d = Depth(int(d) - i); }
+inline void operator-= (Depth &d, int i) { d = Depth(int(d) - i); }
+inline void operator-= (Depth &d1, Depth d2) { d1 -= int(d2); }
 inline Depth operator* (Depth d, int i) { return Depth(int(d) * i); }
 inline Depth operator* (int i, Depth d) { return Depth(int(d) * i); }
 inline void operator*= (Depth &d, int i) { d = Depth(int(d) * i); }