Restore behaviour after count<ALL_PIECES> fix

Because pos.count<ALL_PIECES>(Us) was always zero,
rewrite the formula as if this would still be
the case.

bench: 8510004

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 71120fd..f3586f9 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -878,9 +878,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
                 ebonus -= ebonus / 4;
         }
 
-        // Increase the bonus if we have more non-pawn pieces
-        if (pos.count<ALL_PIECES>(  Us) - pos.count<PAWN>(  Us) >
-            pos.count<ALL_PIECES>(Them) - pos.count<PAWN>(Them))
+        if (pos.count<PAWN>(Us) < pos.count<PAWN>(Them))
             ebonus += ebonus / 4;
 
         score += make_score(mbonus, ebonus);