Do not return unproven mate scores from null move search

[stockfish] / src / book.cpp

diff --git a/src/book.cpp b/src/book.cpp
index 0c72d8e80d862d35b9f17aafc5d3f14cf7321a4c..20861988b24c906b1ba04c5788b6dc9014a553ca 100644 (file)
--- a/src/book.cpp
+++ b/src/book.cpp
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -390,7 +390,7 @@ void Book::close() {
 /// Book::file_name() returns the file name of the currently active book,
 /// or the empty string if no book is open.
 
-const string Book::file_name() const {
+const string Book::file_name() { // Not const to compile on HP-UX 11.X
 
   return is_open() ? fileName : "";
 }
@@ -430,7 +430,7 @@ Move Book::get_move(const Position& pos) {
       return MOVE_NONE;
 
   MoveStack mlist[256];
-  MoveStack* last = generate_legal_moves(pos, mlist);
+  MoveStack* last = generate_moves(pos, mlist);
   for (MoveStack* cur = mlist; cur != last; cur++)
       if ((int(cur->move) & 07777) == bookMove)
           return cur->move;