X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fevaluate.cpp;h=0963ddd606d20b6a5fdd2593537a412467f2188b;hb=0b0b21c608a9c096af6155e39270a29ebfba240f;hp=880aa1375badc42ceba8f89bf78541ad5e84f31d;hpb=28dcd700a9dd3c776b66b2032cf0cf6df88b671d;p=stockfish

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 880aa137..0963ddd6 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -114,7 +114,7 @@ namespace {
   // which piece type attacks which one. Attacks on lesser pieces which are
   // pawn-defended are not considered.
   constexpr Score ThreatByMinor[PIECE_TYPE_NB] = {
-    S(0, 0), S(6, 28), S(39, 42), S(57, 44), S(68, 112), S(62, 120)
+    S(0, 0), S(6, 32), S(59, 41), S(79, 56), S(90, 119), S(79, 161)
   };
 
   constexpr Score ThreatByRook[PIECE_TYPE_NB] = {
@@ -135,7 +135,7 @@ namespace {
   constexpr Score KnightOnQueen      = S( 16, 12);
   constexpr Score LongDiagonalBishop = S( 45,  0);
   constexpr Score MinorBehindPawn    = S( 18,  3);
-  constexpr Score Outpost            = S( 18,  6);
+  constexpr Score Outpost            = S( 16,  5);
   constexpr Score PassedFile         = S( 11,  8);
   constexpr Score PawnlessFlank      = S( 17, 95);
   constexpr Score RestrictedPiece    = S(  7,  7);
@@ -143,7 +143,6 @@ namespace {
   constexpr Score SliderOnQueen      = S( 59, 18);
   constexpr Score ThreatByKing       = S( 24, 89);
   constexpr Score ThreatByPawnPush   = S( 48, 39);
-  constexpr Score ThreatByRank       = S( 13,  0);
   constexpr Score ThreatBySafePawn   = S(173, 94);
   constexpr Score TrappedRook        = S( 47,  4);
   constexpr Score WeakQueen          = S( 49, 15);
@@ -458,7 +457,7 @@ namespace {
                  - 873 * !pos.count<QUEEN>(Them)
                  -   6 * mg_value(score) / 8
                  +       mg_value(mobility[Them] - mobility[Us])
-                 +   5 * kingFlankAttacks * kingFlankAttacks / 16
+                 +   3 * kingFlankAttacks * kingFlankAttacks / 8
                  -   7;
 
     // Transform the kingDanger units into a Score, and subtract it from the evaluation
@@ -510,21 +509,11 @@ namespace {
     {
         b = (defended | weak) & (attackedBy[Us][KNIGHT] | attackedBy[Us][BISHOP]);
         while (b)
-        {
-            Square s = pop_lsb(&b);
-            score += ThreatByMinor[type_of(pos.piece_on(s))];
-            if (type_of(pos.piece_on(s)) != PAWN)
-                score += ThreatByRank * (int)relative_rank(Them, s);
-        }
+            score += ThreatByMinor[type_of(pos.piece_on(pop_lsb(&b)))];
 
         b = weak & attackedBy[Us][ROOK];
         while (b)
-        {
-            Square s = pop_lsb(&b);
-            score += ThreatByRook[type_of(pos.piece_on(s))];
-            if (type_of(pos.piece_on(s)) != PAWN)
-                score += ThreatByRank * (int)relative_rank(Them, s);
-        }
+            score += ThreatByRook[type_of(pos.piece_on(pop_lsb(&b)))];
 
         if (weak & attackedBy[Us][KING])
             score += ThreatByKing;