namespace {
- // Values modified by Joona Kiiski
- const Value MidgameLimit = Value(15581);
- const Value EndgameLimit = Value(3998);
-
// Polynomial material balance parameters
// pair pawn knight bishop rook queen
- const int LinearCoefficients[6] = { 1852, -162, -1122, -183, 249, -52 };
+ const int LinearCoefficients[6] = { 1852, -162, -1122, -183, 249, -154 };
const int QuadraticCoefficientsSameColor[][PIECE_TYPE_NB] = {
// pair pawn knight bishop rook queen
{ 35, 271, -4 }, // Knight
{ 0, 105, 4, 0 }, // Bishop
{ -27, -2, 46, 100, -141 }, // Rook
- { 58, 29, 83, 148, -163, 0 } // Queen
+ {-177, 25, 129, 142, -137, 0 } // Queen
};
const int QuadraticCoefficientsOppositeColor[][PIECE_TYPE_NB] = {
{ 10, 62, 0 }, // Knight OUR PIECES
{ 57, 64, 39, 0 }, // Bishop
{ 50, 40, 23, -22, 0 }, // Rook
- { 106, 101, 3, 151, 171, 0 } // Queen
+ { 98, 105, -39, 141, 274, 0 } // Queen
};
// Endgame evaluation and scaling functions are accessed directly and not through
value += pc * v;
}
- // Queen vs. 3 minors slightly favours the minors
- if (pieceCount[Us][QUEEN] == 1 && pieceCount[Them][QUEEN] == 0)
- {
- int n = pieceCount[Them][KNIGHT] - pieceCount[Us][KNIGHT];
- int b = pieceCount[Them][BISHOP] - pieceCount[Us][BISHOP];
-
- if ((n == 2 && b == 1) || (n == 1 && b == 2))
- value -= 66 * 16;
- }
-
return value;
}