X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbook.cpp;h=ec0a0f83bddbb24ebfa024553868c11f96c2b01f;hp=c5c40dde42f1546a4a8e6938ecc1a19c6190a983;hb=3cc47edf622b1d12a37b3637cae503d6862437c4;hpb=a71209868bdd8361d0607acf7725f70e9d1f2019

diff --git a/src/book.cpp b/src/book.cpp
index c5c40dde..ec0a0f83 100644
--- a/src/book.cpp
+++ b/src/book.cpp
@@ -413,7 +413,7 @@ Move PolyglotBook::probe(const Position& pos, const string& fName, bool pickBest
       // Choose book move according to its score. If a move has a very
       // high score it has higher probability to be choosen than a move
       // with lower score. Note that first entry is always chosen.
-      if (   (sum && rkiss.rand<unsigned>() % sum < e.count)
+      if (   (!pickBest && sum && rkiss.rand<unsigned>() % sum < e.count)
           || (pickBest && e.count == best))
           move = Move(e.move);
   }