Tuned values after 505k games

[stockfish] / src / pawns.cpp

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 6901d7b7845f0a92244ec1e1e2739926948e9d27..4a63f871cadc2a116238fd577ef680682231490f 100644 (file)
--- a/src/pawns.cpp
+++ b/src/pawns.cpp
@@ -32,9 +32,9 @@ namespace {
   #define S(mg, eg) make_score(mg, eg)
 
   // Pawn penalties
-  constexpr Score Isolated = S(13, 16);
-  constexpr Score Backward = S(17, 11);
-  constexpr Score Doubled  = S(13, 40);
+  constexpr Score Isolated = S( 6, 16);
+  constexpr Score Backward = S(15, 21);
+  constexpr Score Doubled  = S( 8, 44);
 
   // Connected pawn bonus by opposed, phalanx, #support and rank
   Score Connected[2][2][3][RANK_NB];
@@ -42,25 +42,25 @@ namespace {
   // Strength of pawn shelter for our king by [distance from edge][rank].
   // RANK_1 = 0 is used for files where we have no pawn, or pawn is behind our king.
   constexpr Value ShelterStrength[int(FILE_NB) / 2][RANK_NB] = {
-    { V(  7), V(76), V( 84), V( 38), V(  7), V( 30), V(-19) },
-    { V(-13), V(83), V( 42), V(-27), V(  2), V(-32), V(-45) },
-    { V(-26), V(63), V(  5), V(-44), V( -5), V(  2), V(-59) },
-    { V(-19), V(53), V(-11), V(-22), V(-12), V(-51), V(-60) }
+    { V( 28), V(79), V( 75), V( 46), V( 14), V( 31), V(-14) },
+    { V(-48), V(50), V( 29), V(-21), V(-41), V(-23), V(-45) },
+    { V(-25), V(50), V( 17), V(-33), V( -5), V(  9), V(-35) },
+    { V(-29), V(57), V(-25), V(-48), V( -4), V(-46), V(-64) }
   };
 
   // Danger of enemy pawns moving toward our king by [distance from edge][rank].
   // RANK_1 = 0 is used for files where the enemy has no pawn, or their pawn
   // is behind our king.
   constexpr Value UnblockedStorm[int(FILE_NB) / 2][RANK_NB] = {
-    { V( 25), V( 79), V(107), V( 51), V( 27), V(  0), V(  0) },
-    { V(  5), V( 35), V(121), V( -2), V( 15), V(-10), V(-10) },
-    { V(-20), V( 22), V( 98), V( 36), V(  7), V(-20), V(-20) },
-    { V(-27), V( 24), V( 80), V( 25), V( -4), V(-30), V(-30) }
+    { V( 34), V( 58), V(113), V( 61), V(37), V( 24), V( 21) },
+    { V( 23), V( 46), V( 93), V( 10), V( 2), V(-20), V(  6) },
+    { V( -6), V( 22), V(106), V( 28), V( 6), V(-33), V( -1) },
+    { V(-17), V( 33), V( 71), V( 14), V(-9), V(-21), V(-16) }
   };
 
   // Danger of blocked enemy pawns storming our king, by rank
   constexpr Value BlockedStorm[RANK_NB] =
-    { V(  0), V(  0), V( 75), V(-10), V(-20), V(-20), V(-20) };
+    { V(0), V(0), V( 58), V(-13), V(-22), V(-3), V(-5) };
 
   #undef S
   #undef V