X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.cpp;h=add8540807d595cee96dc3184c12c28e6924a1f4;hp=7d2612aac1e0ca4e50087805c70c6b03338c8cb5;hb=3c085775d7ce072000f1b5c09921127489806efc;hpb=15ec3e911e231bd992c2e3cf3f7785db6e29f20b diff --git a/src/evaluate.cpp b/src/evaluate.cpp index 7d2612aa..add85408 100644 --- a/src/evaluate.cpp +++ b/src/evaluate.cpp @@ -56,18 +56,18 @@ namespace { // parameters at 100, which looks prettier. // // Values modified by Joona Kiiski - 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); + const Score WeightMobilityInternal = make_score(248, 271); + const Score WeightPawnStructureInternal = make_score(233, 201); + const Score WeightPassedPawnsInternal = make_score(252, 259); + const Score WeightSpaceInternal = make_score( 46, 0); + const Score WeightKingSafetyInternal = make_score(247, 0); + const Score WeightKingOppSafetyInternal = make_score(259, 0); // Mobility and outposts bonus modified by Joona Kiiski // // Visually better to define tables constants typedef Value V; - typedef Score S; + #define S(mg, eg) make_score(mg, eg) // Knight mobility bonus in middle game and endgame, indexed by the number // of attacked squares not occupied by friendly piecess. @@ -140,12 +140,12 @@ namespace { const Value UnstoppablePawnValue = Value(0x500); // Rooks and queens on the 7th rank (modified by Joona Kiiski) - const Score RookOn7thBonus = Score(47, 98); - const Score QueenOn7thBonus = Score(27, 54); + const Score RookOn7thBonus = make_score(47, 98); + const Score QueenOn7thBonus = make_score(27, 54); // Rooks on open files (modified by Joona Kiiski) - const Score RookOpenFileBonus = Score(43, 43); - const Score RookHalfOpenFileBonus = Score(19, 19); + const Score RookOpenFileBonus = make_score(43, 43); + const Score RookHalfOpenFileBonus = make_score(19, 19); // Penalty for rooks trapped inside a friendly king which has lost the // right to castle. @@ -153,7 +153,7 @@ namespace { // Penalty for a bishop on a7/h7 (a2/h2 for black) which is trapped by // enemy pawns. - const Score TrappedBishopA7H7Penalty = Score(300, 300); + const Score TrappedBishopA7H7Penalty = make_score(300, 300); // Bitboard masks for detecting trapped bishops on a7/h7 (a2/h2 for black) const Bitboard MaskA7H7[2] = { @@ -164,7 +164,7 @@ namespace { // 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 Score TrappedBishopA1H1Penalty = Score(100, 100); + const Score TrappedBishopA1H1Penalty = make_score(100, 100); // Bitboard masks for detecting trapped bishops on a1/h1 (a8/h8 for black) const Bitboard MaskA1H1[2] = { @@ -210,7 +210,7 @@ namespace { // ThreatBonus[][] contains bonus according to which piece type // attacks which one. - #define Z Score(0, 0) + #define Z make_score(0, 0) const Score ThreatBonus[8][8] = { { Z, Z, Z, Z, Z, Z, Z, Z }, // not used @@ -230,6 +230,7 @@ namespace { }; #undef Z + #undef S // InitKingDanger[] contains bonuses based on the position of the defending // king. @@ -375,12 +376,12 @@ Value do_evaluate(const Position& pos, EvalInfo& ei, int threadID) { if ( square_file(pos.king_square(WHITE)) >= FILE_E && square_file(pos.king_square(BLACK)) <= FILE_D) - ei.value += Score(ei.pi->queenside_storm_value(WHITE) - ei.pi->kingside_storm_value(BLACK), 0); + ei.value += make_score(ei.pi->queenside_storm_value(WHITE) - ei.pi->kingside_storm_value(BLACK), 0); else if ( square_file(pos.king_square(WHITE)) <= FILE_D && square_file(pos.king_square(BLACK)) >= FILE_E) - ei.value += Score(ei.pi->kingside_storm_value(WHITE) - ei.pi->queenside_storm_value(BLACK), 0); + ei.value += make_score(ei.pi->kingside_storm_value(WHITE) - ei.pi->queenside_storm_value(BLACK), 0); // Evaluate space for both sides if (ei.mi->space_weight() > 0) @@ -397,8 +398,8 @@ Value do_evaluate(const Position& pos, EvalInfo& ei, int threadID) { // colored bishop endgames, and use a lower scale for those if ( phase < PHASE_MIDGAME && pos.opposite_colored_bishops() - && ( (factor[WHITE] == SCALE_FACTOR_NORMAL && ei.value.eg() > Value(0)) - || (factor[BLACK] == SCALE_FACTOR_NORMAL && ei.value.eg() < Value(0)))) + && ( (factor[WHITE] == SCALE_FACTOR_NORMAL && eg_value(ei.value) > Value(0)) + || (factor[BLACK] == SCALE_FACTOR_NORMAL && eg_value(ei.value) < Value(0)))) { ScaleFactor sf; @@ -564,7 +565,7 @@ namespace { else bonus += bonus / 2; } - ei.value += Sign[Us] * Score(bonus, bonus); + ei.value += Sign[Us] * make_score(bonus, bonus); } @@ -654,8 +655,8 @@ namespace { { // Is there a half-open file between the king and the edge of the board? if (!ei.pi->has_open_file_to_right(Us, square_file(ksq))) - ei.value -= Sign[Us] * Score(pos.can_castle(Us) ? (TrappedRookPenalty - mob * 16) / 2 - : (TrappedRookPenalty - mob * 16), 0); + ei.value -= Sign[Us] * make_score(pos.can_castle(Us) ? (TrappedRookPenalty - mob * 16) / 2 + : (TrappedRookPenalty - mob * 16), 0); } else if ( square_file(ksq) <= FILE_D && square_file(s) < square_file(ksq) @@ -663,8 +664,8 @@ namespace { { // Is there a half-open file between the king and the edge of the board? if (!ei.pi->has_open_file_to_left(Us, square_file(ksq))) - ei.value -= Sign[Us] * Score(pos.can_castle(Us) ? (TrappedRookPenalty - mob * 16) / 2 - : (TrappedRookPenalty - mob * 16), 0); + ei.value -= Sign[Us] * make_score(pos.can_castle(Us) ? (TrappedRookPenalty - mob * 16) / 2 + : (TrappedRookPenalty - mob * 16), 0); } } } @@ -680,7 +681,7 @@ namespace { const Color Them = (Us == WHITE ? BLACK : WHITE); Bitboard b; - Score bonus(0, 0); + Score bonus = make_score(0, 0); // Enemy pieces not defended by a pawn and under our attack Bitboard weakEnemies = pos.pieces_of_color(Them) @@ -735,7 +736,7 @@ namespace { if (relative_rank(Us, s) <= RANK_4) { shelter = ei.pi->get_king_shelter(pos, Us, s); - ei.value += Sign[Us] * Score(shelter, 0); + ei.value += Sign[Us] * make_score(shelter, 0); } // King safety. This is quite complicated, and is almost certainly far @@ -882,12 +883,12 @@ namespace { // 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]); + Score v = apply_weight(make_score(SafetyTable[attackUnits], 0), WeightKingSafety[Us]); ei.value -= Sign[Us] * v; if (Us == pos.side_to_move()) - ei.futilityMargin += v.mg(); + ei.futilityMargin += mg_value(v); } } @@ -1015,7 +1016,7 @@ namespace { } // Add the scores for this pawn to the middle game and endgame eval. - ei.value += Sign[Us] * apply_weight(Score(mbonus, ebonus), WeightPassedPawns); + ei.value += Sign[Us] * apply_weight(make_score(mbonus, ebonus), WeightPassedPawns); } // while } @@ -1040,7 +1041,7 @@ namespace { if (!movesToGo[WHITE] || !movesToGo[BLACK]) { Color winnerSide = movesToGo[WHITE] ? WHITE : BLACK; - ei.value += Score(0, Sign[winnerSide] * (UnstoppablePawnValue - Value(0x40 * movesToGo[winnerSide]))); + ei.value += make_score(0, Sign[winnerSide] * (UnstoppablePawnValue - Value(0x40 * movesToGo[winnerSide]))); } else { // Both sides have unstoppable pawns! Try to find out who queens @@ -1055,7 +1056,7 @@ namespace { // If one side queens at least three plies before the other, that side wins if (movesToGo[winnerSide] <= movesToGo[loserSide] - 3) - ei.value += Sign[winnerSide] * Score(0, UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2))); + ei.value += Sign[winnerSide] * make_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 @@ -1076,7 +1077,7 @@ namespace { if ( (b & pos.pieces(KING, loserSide)) ||(bit_is_set(b, loserQSq) && !bit_is_set(ei.attacked_by(loserSide), loserQSq))) - ei.value += Sign[winnerSide] * Score(0, UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2))); + ei.value += Sign[winnerSide] * make_score(0, UnstoppablePawnValue - Value(0x40 * (movesToGo[winnerSide]/2))); } } } @@ -1175,14 +1176,14 @@ namespace { int space = count_1s_max_15(safeSquares) + count_1s_max_15(behindFriendlyPawns & safeSquares); - ei.value += Sign[Us] * apply_weight(Score(space * ei.mi->space_weight(), 0), WeightSpace); + ei.value += Sign[Us] * apply_weight(make_score(space * ei.mi->space_weight(), 0), WeightSpace); } - // apply_weight() applies an evaluation weight to a value + // apply_weight() applies an evaluation weight to a value trying to prevent overflow inline Score apply_weight(Score v, Score w) { - return v * w / 0x100; + return make_score((int(mg_value(v)) * mg_value(w)) / 0x100, (int(eg_value(v)) * eg_value(w)) / 0x100); } @@ -1192,14 +1193,14 @@ namespace { Value scale_by_game_phase(const Score& v, Phase ph, const ScaleFactor sf[]) { - assert(v.mg() > -VALUE_INFINITE && v.mg() < VALUE_INFINITE); - assert(v.eg() > -VALUE_INFINITE && v.eg() < VALUE_INFINITE); + assert(mg_value(v) > -VALUE_INFINITE && mg_value(v) < VALUE_INFINITE); + assert(eg_value(v) > -VALUE_INFINITE && eg_value(v) < VALUE_INFINITE); assert(ph >= PHASE_ENDGAME && ph <= PHASE_MIDGAME); - Value ev = apply_scale_factor(v.eg(), sf[(v.eg() > Value(0) ? WHITE : BLACK)]); + Value ev = apply_scale_factor(eg_value(v), sf[(eg_value(v) > Value(0) ? WHITE : BLACK)]); - Value result = Value(int((v.mg() * ph + ev * (128 - ph)) / 128)); - return Value(int(result) & ~(GrainSize - 1)); + int result = (mg_value(v) * ph + ev * (128 - ph)) / 128; + return Value(result & ~(GrainSize - 1)); } @@ -1208,11 +1209,18 @@ namespace { Score weight_option(const std::string& mgOpt, const std::string& egOpt, Score internalWeight) { - Score uciWeight(get_option_value_int(mgOpt), get_option_value_int(egOpt)); - uciWeight = (uciWeight * 0x100) / 100; - return (uciWeight * internalWeight) / 0x100; - } + Score uciWeight = make_score(get_option_value_int(mgOpt), get_option_value_int(egOpt)); + + // Convert to integer to prevent overflow + int mg = mg_value(uciWeight); + int eg = eg_value(uciWeight); + mg = (mg * 0x100) / 100; + eg = (eg * 0x100) / 100; + mg = (mg * mg_value(internalWeight)) / 0x100; + eg = (eg * eg_value(internalWeight)) / 0x100; + return make_score(mg, eg); + } // init_safety() initizes the king safety evaluation, based on UCI // parameters. It is called from read_weights(). @@ -1255,8 +1263,3 @@ namespace { } } } - -std::ostream& operator<<(std::ostream &os, Score s) { - - return os << "(" << s.mg() << ", " << s.eg() << ")"; -}