Another set of tuned values after one million games

[stockfish] / src / pawns.cpp

diff --git a/src/pawns.cpp b/src/pawns.cpp
index 4a63f871cadc2a116238fd577ef680682231490f..1131b5e81a77cc4a02fc2133ef2221ea97fdf873 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( 6, 16);
-  constexpr Score Backward = S(15, 21);
-  constexpr Score Doubled  = S( 8, 44);
+  constexpr Score Isolated = S( 4, 20);
+  constexpr Score Backward = S(21, 22);
+  constexpr Score Doubled  = S(12, 54);
 
   // 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( 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) }
+    { V( 16), V(82), V( 83), V( 47), V( 19), V( 44), V(  4) },
+    { V(-51), V(56), V( 33), V(-58), V(-57), V(-50), V(-39) },
+    { V(-20), V(71), V( 16), V(-10), V( 13), V( 19), V(-30) },
+    { V(-29), V(12), V(-21), V(-40), V(-15), V(-77), V(-91) }
   };
 
   // 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( 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) }
+    { V(54), V( 48), V( 99), V(91), V(42), V( 32), V( 31) },
+    { V(34), V( 27), V(105), V(38), V(32), V(-19), V(  3) },
+    { V(-4), V( 28), V( 87), V(18), V(-3), V(-14), V(-11) },
+    { V(-5), V( 22), V( 75), V(14), V( 2), V( -5), V(-19) }
   };
 
   // Danger of blocked enemy pawns storming our king, by rank
   constexpr Value BlockedStorm[RANK_NB] =
-    { V(0), V(0), V( 58), V(-13), V(-22), V(-3), V(-5) };
+    { V(0), V(0), V( 81), V(-9), V(-5), V(-1), V(26) };
 
   #undef S
   #undef V