Count passed pawns in asymmetry measure

[stockfish] / src / pawns.cpp

diff --git a/src/pawns.cpp b/src/pawns.cpp
index a1b533258b30f6e4b1b0264c24f896facdbc65ec..7e90089ce7921ba7d1d666c4eb965b8e04a00676 100644 (file)
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -222,8 +222,9 @@ Entry* probe(const Position& pos) {
   e->key = key;
   e->scores[WHITE] = evaluate<WHITE>(pos, e);
   e->scores[BLACK] = evaluate<BLACK>(pos, e);
   e->key = key;
   e->scores[WHITE] = evaluate<WHITE>(pos, e);
   e->scores[BLACK] = evaluate<BLACK>(pos, e);

-  e->asymmetry = popcount(e->semiopenFiles[WHITE] ^ e->semiopenFiles[BLACK]);

   e->openFiles = popcount(e->semiopenFiles[WHITE] & e->semiopenFiles[BLACK]);
   e->openFiles = popcount(e->semiopenFiles[WHITE] & e->semiopenFiles[BLACK]);

+  e->asymmetry = popcount(  (e->passedPawns[WHITE]   | e->passedPawns[BLACK])
+                          | (e->semiopenFiles[WHITE] ^ e->semiopenFiles[BLACK]));

 
   return e;
 }
 
   return e;
 }