Simplify space formula

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 16868 W: 3260 L: 3132 D: 10476

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 16910 W: 2381 L: 2255 D: 12274

bench: 6663531

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 489422fc96f163770aa71791f987baa6d4b0a8a4..84a37dfcfe8fd356f189011271e220b2a47fc008 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -703,10 +703,9 @@ namespace {
 
     // ...count safe + (behind & safe) with a single popcount
     int bonus = popcount((Us == WHITE ? safe << 32 : safe >> 32) | (behind & safe));
 
     // ...count safe + (behind & safe) with a single popcount
     int bonus = popcount((Us == WHITE ? safe << 32 : safe >> 32) | (behind & safe));

-    int weight =  pos.count<KNIGHT>(Us) + pos.count<BISHOP>(Us)
-                + pos.count<KNIGHT>(Them) + pos.count<BISHOP>(Them);
+    int weight = pos.count<ALL_PIECES>(Us);

 
 

-    return make_score(bonus * weight * weight * 2 / 11, 0);
+    return make_score(bonus * weight * weight  / 22, 0);

   }
 
 
   }