X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.cpp;h=6f2dd69ba33d7a5986fe99be7d70493d29023c76;hp=bb1724a4e3bf8dd86466778925cb19ad2b2caa68;hb=4006f2c9132db034a27a94be33070d6aaab75b24;hpb=67818ee9481ba99369fa8a8d92e5c50428fb300e

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index bb1724a4..6f2dd69b 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -719,9 +719,9 @@ namespace {
   }
 
 
-  // Evaluation::winnable() adjusts the mg and eg score components based on the
-  // known attacking/defending status of the players. A single value is derived
-  // by interpolation from the mg and eg values and returned.
+  // Evaluation::winnable() adjusts the midgame and endgame score components, based on
+  // the known attacking/defending status of the players. The final value is derived
+  // by interpolation from the midgame and endgame values.
 
   template<Tracing T>
   Value Evaluation<T>::winnable(Score score) const {
@@ -764,7 +764,7 @@ namespace {
     Color strongSide = eg > VALUE_DRAW ? WHITE : BLACK;
     int sf = me->scale_factor(pos, strongSide);
 
-    // If scale is not already specific, scale down the endgame via general heuristics
+    // If scale factor is not already specific, scale down via general heuristics
     if (sf == SCALE_FACTOR_NORMAL)
     {
         if (pos.opposite_bishops())
@@ -779,7 +779,7 @@ namespace {
                 && pos.non_pawn_material(BLACK) == RookValueMg
                 && pos.count<PAWN>(strongSide) - pos.count<PAWN>(~strongSide) <= 1
                 && bool(KingSide & pos.pieces(strongSide, PAWN)) != bool(QueenSide & pos.pieces(strongSide, PAWN))
-                && (attacks_bb<KING>(pos.square<KING>(~strongSide)) & pos.pieces(~strongSide, PAWN)))
+                && (attackedBy[~strongSide][KING] & pos.pieces(~strongSide, PAWN)))
             sf = 36;
         else if (pos.count<QUEEN>() == 1)
             sf = 37 + 3 * (pos.count<QUEEN>(WHITE) == 1 ? pos.count<BISHOP>(BLACK) + pos.count<KNIGHT>(BLACK)