Retire linear imbalance

Retire linear imbalance and compensate
in piece values enumeration.

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43596 W: 8105 L: 8023 D: 27468

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 24482 W: 3352 L: 3237 D: 17893

Bench: 7777707

diff --git a/src/material.cpp b/src/material.cpp
index f73977b5f369641dfc427507ae66fcc035c58928..f6c4e2d63b1d8f6e649298c77995b89003d2c835 100644 (file)
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -31,13 +31,10 @@ namespace {
 
   // Polynomial material imbalance parameters
 
 
   // Polynomial material imbalance parameters
 

-  //                      pair  pawn knight bishop rook queen
-  const int Linear[6] = { 1667, -168, -1027, -166,  238, -138 };
-

   const int QuadraticOurs[][PIECE_TYPE_NB] = {
     //            OUR PIECES
     // pair pawn knight bishop rook queen
   const int QuadraticOurs[][PIECE_TYPE_NB] = {
     //            OUR PIECES
     // pair pawn knight bishop rook queen

-    {   0                               }, // Bishop pair
+    {1667                               }, // Bishop pair

     {  40,    2                         }, // Pawn
     {  32,  255,  -3                    }, // Knight      OUR PIECES
     {   0,  104,   4,    0              }, // Bishop
     {  40,    2                         }, // Pawn
     {  32,  255,  -3                    }, // Knight      OUR PIECES
     {   0,  104,   4,    0              }, // Bishop


@@ -100,7 +97,7 @@ namespace {
         if (!pieceCount[Us][pt1])
             continue;
 
         if (!pieceCount[Us][pt1])
             continue;
 

-        int v = Linear[pt1];
+        int v = 0;

 
         for (int pt2 = NO_PIECE_TYPE; pt2 <= pt1; ++pt2)
             v +=  QuadraticOurs[pt1][pt2] * pieceCount[Us][pt2]
 
         for (int pt2 = NO_PIECE_TYPE; pt2 <= pt1; ++pt2)
             v +=  QuadraticOurs[pt1][pt2] * pieceCount[Us][pt2]

diff --git a/src/types.h b/src/types.h
index 1440f73b44cca14e8513ef58debee582414600f2..d669d812e3ed8619c9e3e710ea42495b013161be 100644 (file)
--- a/src/types.h
+++ b/src/types.h
@@ -183,13 +183,13 @@ enum Value : int {
   VALUE_MATE_IN_MAX_PLY  =  VALUE_MATE - 2 * MAX_PLY,
   VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
 
   VALUE_MATE_IN_MAX_PLY  =  VALUE_MATE - 2 * MAX_PLY,
   VALUE_MATED_IN_MAX_PLY = -VALUE_MATE + 2 * MAX_PLY,
 

-  PawnValueMg   = 198,   PawnValueEg   = 258,
-  KnightValueMg = 817,   KnightValueEg = 896,
-  BishopValueMg = 836,   BishopValueEg = 907,
-  RookValueMg   = 1270,  RookValueEg   = 1356,
-  QueenValueMg  = 2521,  QueenValueEg  = 2658,
+  PawnValueMg   = 188,   PawnValueEg   = 248,
+  KnightValueMg = 753,   KnightValueEg = 832,
+  BishopValueMg = 826,   BishopValueEg = 897,
+  RookValueMg   = 1285,  RookValueEg   = 1371,
+  QueenValueMg  = 2513,  QueenValueEg  = 2650,

 
 

-  MidgameLimit  = 15581, EndgameLimit  = 3998
+  MidgameLimit  = 15258, EndgameLimit  = 3915

 };
 
 enum PieceType {
 };
 
 enum PieceType {