const Score RookOpenFile = make_score(43, 21);
const Score RookSemiopenFile = make_score(19, 10);
const Score BishopPawns = make_score( 8, 12);
+ const Score KnightPawns = make_score( 8, 4);
const Score MinorBehindPawn = make_score(16, 0);
const Score UndefendedMinor = make_score(25, 10);
const Score TrappedRook = make_score(90, 0);
const int KingAttackWeights[] = { 0, 0, 2, 2, 3, 5 };
// Bonuses for enemy's safe checks
- const int QueenContactCheck = 12;
- const int RookContactCheck = 8;
- const int QueenCheck = 6;
- const int RookCheck = 4;
- const int BishopCheck = 1;
- const int KnightCheck = 2;
+ const int QueenContactCheck = 24;
+ const int RookContactCheck = 16;
+ const int QueenCheck = 12;
+ const int RookCheck = 8;
+ const int BishopCheck = 2;
+ const int KnightCheck = 3;
// KingExposed[Square] contains penalties based on the position of the
// defending king, indexed by king's square (from white's point of view).
if (Piece == BISHOP)
score -= BishopPawns * ei.pi->pawns_on_same_color_squares(Us, s);
+ // Penalty for knight when there are few enemy pawns
+ if (Piece == KNIGHT)
+ score -= KnightPawns * std::max(5 - pos.count<PAWN>(Them), 0);
+
if (Piece == BISHOP || Piece == KNIGHT)
{
// Bishop and knight outposts squares
ebonus -= ebonus / 4;
}
- // Increase the bonus if we have more non-pawn pieces
- if (pos.count<ALL_PIECES>( Us) - pos.count<PAWN>( Us) >
- pos.count<ALL_PIECES>(Them) - pos.count<PAWN>(Them))
+ if (pos.count<PAWN>(Us) < pos.count<PAWN>(Them))
ebonus += ebonus / 4;
score += make_score(mbonus, ebonus);