Fix a very old bug in queen mobility

[stockfish] / src / pawns.h

diff --git a/src/pawns.h b/src/pawns.h
index 95575184c9554279c72793b9787e698244e289dd..75136c6fe6c0ed3c75f9af1daabe8b934e6029a9 100644 (file)
--- a/src/pawns.h
+++ b/src/pawns.h
@@ -7,12 +7,12 @@
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
-  
+
   Stockfish is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
-  
+
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
@@ -32,7 +32,7 @@
 //// Types
 ////
 
-/// PawnInfo is a class which contains various information about a pawn 
+/// PawnInfo is a class which contains various information about a pawn
 /// structure.  Currently, it only includes a middle game and an end game
 /// pawn structure evaluation, and a bitboard of passed pawns.  We may want
 /// to add further information in the future.  A lookup to the pawn hash table
@@ -120,10 +120,10 @@ inline bool PawnInfo::has_open_file_to_right(Color c, File f) const {
 }
 
 inline void PawnInfo::clear() {
-  mgValue = egValue = 0;
-  passedPawns = EmptyBoardBB;
-  ksStormValue[WHITE] = ksStormValue[BLACK] = 0;
-  qsStormValue[WHITE] = qsStormValue[BLACK] = 0;
+
+  Key k = key;
+  memset(this, 0, sizeof(PawnInfo));
+  key = k;
   halfOpenFiles[WHITE] = halfOpenFiles[BLACK] = 0xFF;
 }