X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbook.cpp;h=cc557e4800aac7126ed74ccdb1cf33c29ba9436c;hp=1baafbbaabb618f87c2b425a09f3a844fcf3f182;hb=f30f384757499508ebc670a1c58b99737e2449db;hpb=161c6b025e763d6bcc8339a614be312f2b173437

diff --git a/src/book.cpp b/src/book.cpp
index 1baafbba..cc557e48 100644
--- a/src/book.cpp
+++ b/src/book.cpp
@@ -315,7 +315,7 @@ namespace {
   uint64_t book_key(const Position& pos) {
 
     uint64_t key = 0;
-    Bitboard b = pos.occupied_squares();
+    Bitboard b = pos.pieces();
 
     while (b)
     {