X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmaterial.cpp;h=068d88e702092a67259ae312165bb33683cb101e;hp=b9b4bb63988ec28f6425592b937d8118b6ce2205;hb=3ed86ed3f95f712587bea62f4a7fc474812db458;hpb=e4d34e18153c953e63c49dc1c9dfd8ccdaa259f0;ds=sidebyside

diff --git a/src/material.cpp b/src/material.cpp
index b9b4bb63..068d88e7 100644
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -35,10 +35,9 @@ namespace {
   const int NoPawnsSF[4] = { 6, 12, 32 };
 
   // Polynomial material balance parameters
-  const Value RedundantMajor = Value(160);
 
   //                                  pair  pawn knight bishop rook queen
-  const int LinearCoefficients[6] = { 1852, -162, -1122, -183,  302,  1 };
+  const int LinearCoefficients[6] = { 1852, -162, -1122, -183,  249, -52 };
 
   const int QuadraticCoefficientsSameColor[][PIECE_TYPE_NB] = {
     // pair pawn knight bishop rook queen
@@ -105,10 +104,6 @@ namespace {
     int pt1, pt2, pc, v;
     int value = 0;
 
-    // Penalty for major piece redundancy
-    if (pieceCount[Us][ROOK] + pieceCount[Us][QUEEN] > 1)
-        value -= RedundantMajor;
-
     // Second-degree polynomial material imbalance by Tord Romstad
     for (pt1 = NO_PIECE_TYPE; pt1 <= QUEEN; ++pt1)
     {