X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fevaluate.cpp;h=fbe768bbbd4d72983fd1abd312ec7c31ba881c58;hb=eb07775583c39893bc6eb65a40b5f62a7799deee;hp=deb8211ab7d5d86d3f214f0b9e5f11231d786ee6;hpb=c8589903777b6e0289640b43fae966ded442af48;p=stockfish

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index deb8211a..fbe768bb 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -228,6 +228,8 @@ namespace {
 
     const Square ksq = pos.square<KING>(Us);
 
+    Bitboard dblAttackByPawn = pawn_double_attacks_bb<Us>(pos.pieces(Us, PAWN));
+
     // Find our pawns that are blocked or on the first two ranks
     Bitboard b = pos.pieces(Us, PAWN) & (shift<Down>(pos.pieces()) | LowRanks);
 
@@ -239,7 +241,8 @@ namespace {
     attackedBy[Us][KING] = pos.attacks_from<KING>(ksq);
     attackedBy[Us][PAWN] = pe->pawn_attacks(Us);
     attackedBy[Us][ALL_PIECES] = attackedBy[Us][KING] | attackedBy[Us][PAWN];
-    attackedBy2[Us]            = attackedBy[Us][KING] & attackedBy[Us][PAWN];
+    attackedBy2[Us]            = (attackedBy[Us][KING] & attackedBy[Us][PAWN])
+                                 | dblAttackByPawn;
 
     // Init our king safety tables
     kingRing[Us] = attackedBy[Us][KING];
@@ -256,7 +259,7 @@ namespace {
     kingAttacksCount[Them] = kingAttackersWeight[Them] = 0;
 
     // Remove from kingRing[] the squares defended by two pawns
-    kingRing[Us] &= ~pawn_double_attacks_bb<Us>(pos.pieces(Us, PAWN));
+    kingRing[Us] &= ~dblAttackByPawn;
   }
 
 
@@ -355,8 +358,8 @@ namespace {
                 score += RookOnPawn * popcount(pos.pieces(Them, PAWN) & PseudoAttacks[ROOK][s]);
 
             // Bonus for rook on an open or semi-open file
-            if (pe->semiopen_file(Us, file_of(s)))
-                score += RookOnFile[bool(pe->semiopen_file(Them, file_of(s)))];
+            if (pos.semiopen_file(Us, file_of(s)))
+                score += RookOnFile[bool(pos.semiopen_file(Them, file_of(s)))];
 
             // Penalty when trapped by the king, even more if the king cannot castle
             else if (mob <= 3)
@@ -469,10 +472,10 @@ namespace {
                  -   6 * mg_value(score) / 8
                  +       mg_value(mobility[Them] - mobility[Us])
                  +   5 * kingFlankAttacks * kingFlankAttacks / 16
-                 -   25;
+                 -   15;
 
     // Transform the kingDanger units into a Score, and subtract it from the evaluation
-    if (kingDanger > 0)
+    if (kingDanger > 100)
         score -= make_score(kingDanger * kingDanger / 4096, kingDanger / 16);
 
     // Penalty when our king is on a pawnless flank
@@ -717,7 +720,7 @@ namespace {
 
     int bonus = popcount(safe) + popcount(behind & safe);
     int weight =  pos.count<ALL_PIECES>(Us)
-                - 2 * popcount(pe->semiopenFiles[WHITE] & pe->semiopenFiles[BLACK]);
+               - (16 - pos.count<PAWN>()) / 4;
 
     Score score = make_score(bonus * weight * weight / 16, 0);