Combo of Parameter Tweaks

This patch is a combo of the following tweaks:

Complexity parameters
Knight PSQT
Bishop PSQT
King PSQT
Piece Values

Passed STC:
LLR: 2.95 (-2.94,2.94) [-1.50,4.50]
Total: 56527 W: 12326 L: 12052 D: 32149
http://tests.stockfishchess.org/tests/view/5dbbca3f0ebc5925b64ee6d6

Passed LTC:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 64010 W: 10549 L: 10199 D: 43262
http://tests.stockfishchess.org/tests/view/5dbc30dc0ebc5925b64eee0c

Closes https://github.com/official-stockfish/Stockfish/pull/2390

Bench: 4312945

diff --git a/AUTHORS b/AUTHORS
index 8317f545a2dfebb8233d4f9ec04514da9f274b70..979410ae4bd41a173e7b1e79f6b7fdde24480215 100644 (file)
--- a/AUTHORS
+++ b/AUTHORS
@@ -64,7 +64,7 @@ Jean Gauthier (QuaisBla)
 Jean-Francois Romang (jromang)
 Jerry Donald Watson (jerrydonaldwatson)
 Jonathan Calovski (Mysseno)
-Jonathan D. (SFisGOD)
+Jonathan Dumale (SFisGOD)
 Joost VandeVondele (vondele)
 Jörg Oster (joergoster)
 Joseph Ellis (jhellis3)

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 959ccd8431cfba2e96cdf98ccfed8f1119c8cc62..ea54e271390e68e5a0f65cbb63537628ef0fd6d9 100644 (file)
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -713,10 +713,10 @@ namespace {
     int complexity =   9 * pe->passed_count()
                     + 11 * pos.count<PAWN>()
                     +  9 * outflanking
-                    + 18 * pawnsOnBothFlanks
-                    + 49 * !pos.non_pawn_material()
-                    - 36 * almostUnwinnable
-                    -103 ;
+                    + 21 * pawnsOnBothFlanks
+                    + 51 * !pos.non_pawn_material()
+                    - 43 * almostUnwinnable
+                    - 95 ;
 
     // Now apply the bonus: note that we find the attacking side by extracting the
     // sign of the midgame or endgame values, and that we carefully cap the bonus

diff --git a/src/psqt.cpp b/src/psqt.cpp
index 655eb993663d127b2ae5b987265b856094c62bd4..60d17ad29e55c2366640d4f2aa786f567bce3a54 100644 (file)
--- a/src/psqt.cpp
+++ b/src/psqt.cpp
@@ -39,24 +39,24 @@ constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
   { },
   { },
   { // Knight
-   { S(-169,-105), S(-96,-74), S(-80,-46), S(-79,-18) },
-   { S( -79, -70), S(-39,-56), S(-24,-15), S( -9,  6) },
-   { S( -64, -38), S(-20,-33), S(  4, -5), S( 19, 27) },
-   { S( -28, -36), S(  5,  0), S( 41, 13), S( 47, 34) },
-   { S( -29, -41), S( 13,-20), S( 42,  4), S( 52, 35) },
-   { S( -11, -51), S( 28,-38), S( 63,-17), S( 55, 19) },
-   { S( -67, -64), S(-21,-45), S(  6,-37), S( 37, 16) },
-   { S(-200, -98), S(-80,-89), S(-53,-53), S(-32,-16) }
+   { S(-175, -96), S(-92,-65), S(-74,-49), S(-73,-21) },
+   { S( -77, -67), S(-41,-54), S(-27,-18), S(-15,  8) },
+   { S( -61, -40), S(-17,-27), S(  6, -8), S( 12, 29) },
+   { S( -35, -35), S(  8, -2), S( 40, 13), S( 49, 28) },
+   { S( -34, -45), S( 13,-16), S( 44,  9), S( 51, 39) },
+   { S(  -9, -51), S( 22,-44), S( 58,-16), S( 53, 17) },
+   { S( -67, -69), S(-27,-50), S(  4,-51), S( 37, 12) },
+   { S(-201,-100), S(-83,-88), S(-56,-56), S(-26,-17) }
   },
   { // Bishop
-   { S(-44,-63), S( -4,-30), S(-11,-35), S(-28, -8) },
-   { S(-18,-38), S(  7,-13), S( 14,-14), S(  3,  0) },
-   { S( -8,-18), S( 24,  0), S( -3, -7), S( 15, 13) },
-   { S(  1,-26), S(  8, -3), S( 26,  1), S( 37, 16) },
-   { S( -7,-24), S( 30, -6), S( 23,-10), S( 28, 17) },
-   { S(-17,-26), S(  4,  2), S( -1,  1), S(  8, 16) },
-   { S(-21,-34), S(-19,-18), S( 10, -7), S( -6,  9) },
-   { S(-48,-51), S( -3,-40), S(-12,-39), S(-25,-20) }
+   { S(-53,-57), S( -5,-30), S( -8,-37), S(-23,-12) },
+   { S(-15,-37), S(  8,-13), S( 19,-17), S(  4,  1) },
+   { S( -7,-16), S( 21, -1), S( -5, -2), S( 17, 10) },
+   { S( -5,-20), S( 11, -6), S( 25,  0), S( 39, 17) },
+   { S(-12,-17), S( 29, -1), S( 22,-14), S( 31, 15) },
+   { S(-16,-30), S(  6,  6), S(  1,  4), S( 11,  6) },
+   { S(-17,-31), S(-14,-20), S(  5, -1), S(  0,  1) },
+   { S(-48,-46), S(  1,-42), S(-14,-37), S(-23,-24) }
   },
   { // Rook
    { S(-31, -9), S(-20,-13), S(-14,-10), S(-5, -9) },
@@ -79,14 +79,14 @@ constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
    { S(-2,-75), S(-2,-52), S( 1,-43), S(-2,-36) }
   },
   { // King
-   { S(272,  0), S(325, 41), S(273, 80), S(190, 93) },
-   { S(277, 57), S(305, 98), S(241,138), S(183,131) },
-   { S(198, 86), S(253,138), S(168,165), S(120,173) },
-   { S(169,103), S(191,152), S(136,168), S(108,169) },
-   { S(145, 98), S(176,166), S(112,197), S( 69,194) },
-   { S(122, 87), S(159,164), S( 85,174), S( 36,189) },
-   { S( 87, 40), S(120, 99), S( 64,128), S( 25,141) },
-   { S( 64,  5), S( 87, 60), S( 49, 75), S(  0, 75) }
+   { S(271,  1), S(327, 45), S(270, 85), S(192, 76) },
+   { S(278, 53), S(303,100), S(230,133), S(174,135) },
+   { S(195, 88), S(258,130), S(169,169), S(120,175) },
+   { S(164,103), S(190,156), S(138,172), S( 98,172) },
+   { S(154, 96), S(179,166), S(105,199), S( 70,199) },
+   { S(123, 92), S(145,172), S( 81,184), S( 31,191) },
+   { S( 88, 47), S(120,121), S( 65,116), S( 33,131) },
+   { S( 59, 11), S( 89, 59), S( 45, 73), S( -1, 78) }
   }
 };
 

diff --git a/src/types.h b/src/types.h
index 5197e9fbbe3b0d50cd57f4a89d52009323b8bc0e..13c3bbf236cc9ec6f19d7b2911f192b7bac12d7d 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -180,10 +180,10 @@ enum Value : int {
   VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
 
   PawnValueMg   = 128,   PawnValueEg   = 213,
-  KnightValueMg = 782,   KnightValueEg = 865,
-  BishopValueMg = 830,   BishopValueEg = 918,
-  RookValueMg   = 1289,  RookValueEg   = 1378,
-  QueenValueMg  = 2529,  QueenValueEg  = 2687,
+  KnightValueMg = 781,   KnightValueEg = 854,
+  BishopValueMg = 825,   BishopValueEg = 915,
+  RookValueMg   = 1276,  RookValueEg   = 1380,
+  QueenValueMg  = 2538,  QueenValueEg  = 2682,
 
   MidgameLimit  = 15258, EndgameLimit  = 3915
 };