X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbook.cpp;h=cc557e4800aac7126ed74ccdb1cf33c29ba9436c;hp=1baafbbaabb618f87c2b425a09f3a844fcf3f182;hb=fc3ea7365ad95ec1da05ac559e4e659cf8a7f0f9;hpb=55376219b7cd17c1dc5d8361e969f30e5421e87e

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)
     {