const int GrainSize = 8;
// Evaluation weights, initialized from UCI options
- int WeightMobilityMidgame, WeightMobilityEndgame;
- int WeightPawnStructureMidgame, WeightPawnStructureEndgame;
- int WeightPassedPawnsMidgame, WeightPassedPawnsEndgame;
- int WeightKingSafety[2];
- int WeightSpace;
+ Score WeightMobility, WeightPawnStructure;
+ Score WeightPassedPawns, WeightSpace;
+ Score WeightKingSafety[2];
// Internal evaluation weights. These are applied on top of the evaluation
// weights read from UCI parameters. The purpose is to be able to change
// parameters at 100, which looks prettier.
//
// Values modified by Joona Kiiski
- const int WeightMobilityMidgameInternal = 248;
- const int WeightMobilityEndgameInternal = 271;
- const int WeightPawnStructureMidgameInternal = 233;
- const int WeightPawnStructureEndgameInternal = 201;
- const int WeightPassedPawnsMidgameInternal = 252;
- const int WeightPassedPawnsEndgameInternal = 259;
- const int WeightKingSafetyInternal = 247;
- const int WeightKingOppSafetyInternal = 259;
- const int WeightSpaceInternal = 46;
+ const Score WeightMobilityInternal = Score(248, 271);
+ const Score WeightPawnStructureInternal = Score(233, 201);
+ const Score WeightPassedPawnsInternal = Score(252, 259);
+ const Score WeightSpaceInternal = Score( 46, 0);
+ const Score WeightKingSafetyInternal = Score(247, 0);
+ const Score WeightKingOppSafetyInternal = Score(259, 0);
// Mobility and outposts bonus modified by Joona Kiiski
//
const Score QueenOn7thBonus = Score(27, 54);
// Rooks on open files (modified by Joona Kiiski)
- const Value RookOpenFileBonus = Value(43);
- const Value RookHalfOpenFileBonus = Value(19);
+ const Score RookOpenFileBonus = Score(43, 43);
+ const Score RookHalfOpenFileBonus = Score(19, 19);
// Penalty for rooks trapped inside a friendly king which has lost the
// right to castle.
// Penalty for a bishop on a7/h7 (a2/h2 for black) which is trapped by
// enemy pawns.
- const Value TrappedBishopA7H7Penalty = Value(300);
+ const Score TrappedBishopA7H7Penalty = Score(300, 300);
// Bitboard masks for detecting trapped bishops on a7/h7 (a2/h2 for black)
const Bitboard MaskA7H7[2] = {
// Penalty for a bishop on a1/h1 (a8/h8 for black) which is trapped by
// a friendly pawn on b2/g2 (b7/g7 for black). This can obviously only
// happen in Chess960 games.
- const Value TrappedBishopA1H1Penalty = Value(100);
+ const Score TrappedBishopA1H1Penalty = Score(100, 100);
// Bitboard masks for detecting trapped bishops on a1/h1 (a8/h8 for black)
const Bitboard MaskA1H1[2] = {
// ThreatBonus[][] contains bonus according to which piece type
// attacks which one.
- const Score ThreatBonus[8][8] = {
#define Z Score(0, 0)
+
+ const Score ThreatBonus[8][8] = {
{ Z, Z, Z, Z, Z, Z, Z, Z }, // not used
{ Z, S(18,37), Z, S(37,47), S(55,97), S(55,97), Z, Z }, // KNIGHT attacks
{ Z, S(18,37), S(37,47), Z, S(55,97), S(55,97), Z, Z }, // BISHOP attacks
{ Z, Z, Z, Z, Z, Z, Z, Z }, // not used
{ Z, Z, Z, Z, Z, Z, Z, Z }, // not used
{ Z, Z, Z, Z, Z, Z, Z, Z } // not used
- #undef Z
};
// ThreatedByPawnPenalty[] contains a penalty according to which piece
// type is attacked by an enemy pawn.
- const Value MidgameThreatedByPawnPenalty[8] = {
- V(0), V(0), V(56), V(56), V(76), V(86), V(0), V(0)
+ const Score ThreatedByPawnPenalty[8] = {
+ Z, Z, S(56, 70), S(56, 70), S(76, 99), S(86, 118), Z, Z
};
- const Value EndgameThreatedByPawnPenalty[8] = {
- V(0), V(0), V(70), V(70), V(99), V(118), V(0), V(0)
- };
+ #undef Z
// InitKingDanger[] contains bonuses based on the position of the defending
// king.
void evaluate_passed_pawns(const Position& pos, EvalInfo& ei);
void evaluate_trapped_bishop_a7h7(const Position& pos, Square s, Color us, EvalInfo& ei);
void evaluate_trapped_bishop_a1h1(const Position& pos, Square s, Color us, EvalInfo& ei);
- inline Score apply_weight(Score v, int wmg, int weg);
+ inline Score apply_weight(Score v, Score weight);
Value scale_by_game_phase(const Score& v, Phase ph, const ScaleFactor sf[]);
- int weight_option(const std::string& opt, int weight);
+ Score weight_option(const std::string& mgOpt, const std::string& egOpt, Score internalWeight);
void init_safety();
}
// Probe the pawn hash table
ei.pi = PawnTable[threadID]->get_pawn_info(pos);
- ei.value += apply_weight(ei.pi->value(), WeightPawnStructureMidgame, WeightPawnStructureEndgame);
+ ei.value += apply_weight(ei.pi->value(), WeightPawnStructure);
// Initialize king attack bitboards and king attack zones for both sides
ei.attackedBy[WHITE][KING] = pos.attacks_from<KING>(pos.king_square(WHITE));
}
// Mobility
- ei.value += apply_weight(ei.mobility, WeightMobilityMidgame, WeightMobilityEndgame);
+ ei.value += apply_weight(ei.mobility, WeightMobility);
// If we don't already have an unusual scale factor, check for opposite
// colored bishop endgames, and use a lower scale for those
Color them = opposite_color(us);
- WeightMobilityMidgame = weight_option("Mobility (Middle Game)", WeightMobilityMidgameInternal);
- WeightMobilityEndgame = weight_option("Mobility (Endgame)", WeightMobilityEndgameInternal);
- WeightPawnStructureMidgame = weight_option("Pawn Structure (Middle Game)", WeightPawnStructureMidgameInternal);
- WeightPawnStructureEndgame = weight_option("Pawn Structure (Endgame)", WeightPawnStructureEndgameInternal);
- WeightPassedPawnsMidgame = weight_option("Passed Pawns (Middle Game)", WeightPassedPawnsMidgameInternal);
- WeightPassedPawnsEndgame = weight_option("Passed Pawns (Endgame)", WeightPassedPawnsEndgameInternal);
- WeightSpace = weight_option("Space", WeightSpaceInternal);
- WeightKingSafety[us] = weight_option("Cowardice", WeightKingSafetyInternal);
- WeightKingSafety[them] = weight_option("Aggressiveness", WeightKingOppSafetyInternal);
+ WeightMobility = weight_option("Mobility (Middle Game)", "Mobility (Endgame)", WeightMobilityInternal);
+ WeightPawnStructure = weight_option("Pawn Structure (Middle Game)", "Pawn Structure (Endgame)", WeightPawnStructureInternal);
+ WeightPassedPawns = weight_option("Passed Pawns (Middle Game)", "Passed Pawns (Endgame)", WeightPassedPawnsInternal);
+ WeightSpace = weight_option("Space", "Space", WeightSpaceInternal);
+ WeightKingSafety[us] = weight_option("Cowardice", "Cowardice", WeightKingSafetyInternal);
+ WeightKingSafety[them] = weight_option("Aggressiveness", "Aggressiveness", WeightKingOppSafetyInternal);
// If running in analysis mode, make sure we use symmetrical king safety. We do this
// by replacing both WeightKingSafety[us] and WeightKingSafety[them] by their average.
// Decrease score if we are attacked by an enemy pawn. Remaining part
// of threat evaluation must be done later when we have full attack info.
if (bit_is_set(ei.attackedBy[Them][PAWN], s))
- ei.value -= Sign[Us] * Score(MidgameThreatedByPawnPenalty[Piece], EndgameThreatedByPawnPenalty[Piece]);
+ ei.value -= Sign[Us] * ThreatedByPawnPenalty[Piece];
// Bishop and knight outposts squares
if ((Piece == BISHOP || Piece == KNIGHT) && pos.square_is_weak(s, Them))
if (ei.pi->file_is_half_open(Us, f))
{
if (ei.pi->file_is_half_open(Them, f))
- ei.value += Sign[Us] * Score(RookOpenFileBonus, RookOpenFileBonus);
+ ei.value += Sign[Us] * RookOpenFileBonus;
else
- ei.value += Sign[Us] * Score(RookHalfOpenFileBonus, RookHalfOpenFileBonus);
+ ei.value += Sign[Us] * RookHalfOpenFileBonus;
}
// Penalize rooks which are trapped inside a king. Penalize more if
// that the king safety scores can sometimes be very big, and that
// capturing a single attacking piece can therefore result in a score
// change far bigger than the value of the captured piece.
- Score v = apply_weight(Score(SafetyTable[attackUnits], 0), WeightKingSafety[Us], 0);
+ Score v = apply_weight(Score(SafetyTable[attackUnits], 0), WeightKingSafety[Us]);
ei.value -= Sign[Us] * v;
}
// Add the scores for this pawn to the middle game and endgame eval.
- ei.value += Sign[Us] * apply_weight(Score(mbonus, ebonus), WeightPassedPawnsMidgame, WeightPassedPawnsEndgame);
+ ei.value += Sign[Us] * apply_weight(Score(mbonus, ebonus), WeightPassedPawns);
} // while
}
// If one side queens at least three plies before the other, that side wins
if (movesToGo[winnerSide] <= movesToGo[loserSide] - 3)
- ei.value += Score(0, Sign[winnerSide] * (UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2))));
+ ei.value += Sign[winnerSide] * Score(0, UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2)));
// If one side queens one ply before the other and checks the king or attacks
// the undefended opponent's queening square, that side wins. To avoid cases
if ( (b & pos.pieces(KING, loserSide))
||(bit_is_set(b, loserQSq) && !bit_is_set(ei.attacked_by(loserSide), loserQSq)))
- ei.value += Score(0, Sign[winnerSide] * (UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2))));
+ ei.value += Sign[winnerSide] * Score(0, UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2)));
}
}
}
&& pos.see(s, b6) < 0
&& pos.see(s, b8) < 0)
{
- ei.value -= Sign[us] * Score(TrappedBishopA7H7Penalty, TrappedBishopA7H7Penalty);
+ ei.value -= Sign[us] * TrappedBishopA7H7Penalty;
}
}
if (pos.piece_on(b2) == pawn)
{
- Value penalty;
+ Score penalty;
if (!pos.square_is_empty(b3))
- penalty = 2*TrappedBishopA1H1Penalty;
+ penalty = 2 * TrappedBishopA1H1Penalty;
else if (pos.piece_on(c3) == pawn)
penalty = TrappedBishopA1H1Penalty;
else
penalty = TrappedBishopA1H1Penalty / 2;
- ei.value -= Sign[us] * Score(penalty, penalty);
+ ei.value -= Sign[us] * penalty;
}
}
int space = count_1s_max_15<HasPopCnt>(safeSquares)
+ count_1s_max_15<HasPopCnt>(behindFriendlyPawns & safeSquares);
- ei.value += Sign[Us] * apply_weight(Score(space * ei.mi->space_weight(), 0), WeightSpace, 0);
+ ei.value += Sign[Us] * apply_weight(Score(space * ei.mi->space_weight(), 0), WeightSpace);
}
// apply_weight() applies an evaluation weight to a value
- inline Score apply_weight(Score v, int wmg, int weg) {
- return Score(v.mg() * wmg, v.eg() * weg) / 0x100;
+ inline Score apply_weight(Score v, Score w) {
+ return v * w / 0x100;
}
// weight_option() computes the value of an evaluation weight, by combining
- // an UCI-configurable weight with an internal weight.
+ // two UCI-configurable weights (midgame and endgame) with an internal weight.
- int weight_option(const std::string& opt, int internalWeight) {
+ Score weight_option(const std::string& mgOpt, const std::string& egOpt, Score internalWeight) {
- int uciWeight = get_option_value_int(opt);
+ Score uciWeight(get_option_value_int(mgOpt), get_option_value_int(egOpt));
uciWeight = (uciWeight * 0x100) / 100;
return (uciWeight * internalWeight) / 0x100;
}
projects / stockfish / blobdiff