const int WeightPassedPawnsMidgameInternal = 0x100;
const int WeightPassedPawnsEndgameInternal = 0x100;
const int WeightKingSafetyInternal = 0x100;
+ const int WeightKingOppSafetyInternal = 0x100;
// Visually better to define tables constants
typedef Value V;
int count_1s_8bit(Bitboard b);
int compute_weight(int uciWeight, int internalWeight);
+ int weight_option(const std::string& opt, int weight);
void init_safety();
}
/// between them based on the remaining material.
Value evaluate(const Position &pos, EvalInfo &ei, int threadID) {
- Color stm;
- Square s;
- ScaleFactor factor[2] = {SCALE_FACTOR_NORMAL, SCALE_FACTOR_NORMAL};
- Phase phase;
-
- memset(&ei, 0, sizeof(EvalInfo));
assert(pos.is_ok());
assert(threadID >= 0 && threadID < THREAD_MAX);
- stm = pos.side_to_move();
+ memset(&ei, 0, sizeof(EvalInfo));
// Initialize by reading the incrementally updated scores included in the
- // position object (material + piece square tables):
+ // position object (material + piece square tables)
ei.mgValue = pos.mg_value();
ei.egValue = pos.eg_value();
- // Probe the material hash table:
+ // Probe the material hash table
ei.mi = MaterialTable[threadID]->get_material_info(pos);
ei.mgValue += ei.mi->mg_value();
ei.egValue += ei.mi->eg_value();
- factor[WHITE] = ei.mi->scale_factor(pos, WHITE);
- factor[BLACK] = ei.mi->scale_factor(pos, BLACK);
-
// If we have a specialized evaluation function for the current material
- // configuration, call it and return:
- if(ei.mi->specialized_eval_exists())
- return ei.mi->evaluate(pos);
+ // configuration, call it and return
+ if (ei.mi->specialized_eval_exists())
+ return ei.mi->evaluate(pos);
- phase = pos.game_phase();
+ // After get_material_info() call that modifies them
+ ScaleFactor factor[2];
+ factor[WHITE] = ei.mi->scale_factor(pos, WHITE);
+ factor[BLACK] = ei.mi->scale_factor(pos, BLACK);
- // Probe the pawn hash table:
+ // Probe the pawn hash table
ei.pi = PawnTable[threadID]->get_pawn_info(pos);
ei.mgValue += apply_weight(ei.pi->mg_value(), WeightPawnStructureMidgame);
ei.egValue += apply_weight(ei.pi->eg_value(), WeightPawnStructureEndgame);
- // Initialize king attack bitboards and king attack zones for both sides:
+ // Initialize king attack bitboards and king attack zones for both sides
ei.attackedBy[WHITE][KING] = pos.king_attacks(pos.king_square(WHITE));
ei.attackedBy[BLACK][KING] = pos.king_attacks(pos.king_square(BLACK));
- ei.attackZone[WHITE] =
- ei.attackedBy[BLACK][KING] | (ei.attackedBy[BLACK][KING] >> 8);
- ei.attackZone[BLACK] =
- ei.attackedBy[WHITE][KING] | (ei.attackedBy[WHITE][KING] << 8);
-
- // Initialize pawn attack bitboards for both sides:
- ei.attackedBy[WHITE][PAWN] =
- ((pos.pawns(WHITE) << 9) & ~FileABB) | ((pos.pawns(WHITE) << 7) & ~FileHBB);
- ei.attackCount[WHITE] +=
- count_1s_max_15(ei.attackedBy[WHITE][PAWN] & ei.attackedBy[BLACK][KING])/2;
- ei.attackedBy[BLACK][PAWN] =
- ((pos.pawns(BLACK) >> 7) & ~FileABB) | ((pos.pawns(BLACK) >> 9) & ~FileHBB);
- ei.attackCount[BLACK] +=
- count_1s_max_15(ei.attackedBy[BLACK][PAWN] & ei.attackedBy[WHITE][KING])/2;
-
- // Evaluate pieces:
- for(Color c = WHITE; c <= BLACK; c++) {
- Bitboard b;
+ ei.kingZone[WHITE] = ei.attackedBy[BLACK][KING] | (ei.attackedBy[BLACK][KING] >> 8);
+ ei.kingZone[BLACK] = ei.attackedBy[WHITE][KING] | (ei.attackedBy[WHITE][KING] << 8);
+
+ // Initialize pawn attack bitboards for both sides
+ ei.attackedBy[WHITE][PAWN] = ((pos.pawns(WHITE) << 9) & ~FileABB) | ((pos.pawns(WHITE) << 7) & ~FileHBB);
+ ei.attackedBy[BLACK][PAWN] = ((pos.pawns(BLACK) >> 7) & ~FileABB) | ((pos.pawns(BLACK) >> 9) & ~FileHBB);
+ ei.kingAttackersCount[WHITE] = count_1s_max_15(ei.attackedBy[WHITE][PAWN] & ei.attackedBy[BLACK][KING])/2;
+ ei.kingAttackersCount[BLACK] = count_1s_max_15(ei.attackedBy[BLACK][PAWN] & ei.attackedBy[WHITE][KING])/2;
+ // Evaluate pieces
+ for (Color c = WHITE; c <= BLACK; c++)
+ {
// Knights
- for(int i = 0; i < pos.knight_count(c); i++) {
- s = pos.knight_list(c, i);
- evaluate_knight(pos, s, c, ei);
- }
+ for (int i = 0; i < pos.knight_count(c); i++)
+ evaluate_knight(pos, pos.knight_list(c, i), c, ei);
// Bishops
- for(int i = 0; i < pos.bishop_count(c); i++) {
- s = pos.bishop_list(c, i);
- evaluate_bishop(pos, s, c, ei);
- }
+ for (int i = 0; i < pos.bishop_count(c); i++)
+ evaluate_bishop(pos, pos.bishop_list(c, i), c, ei);
// Rooks
- for(int i = 0; i < pos.rook_count(c); i++) {
- s = pos.rook_list(c, i);
- evaluate_rook(pos, s, c, ei);
- }
+ for (int i = 0; i < pos.rook_count(c); i++)
+ evaluate_rook(pos, pos.rook_list(c, i), c, ei);
// Queens
- for(int i = 0; i < pos.queen_count(c); i++) {
- s = pos.queen_list(c, i);
- evaluate_queen(pos, s, c, ei);
- }
-
- // Some special patterns:
+ for(int i = 0; i < pos.queen_count(c); i++)
+ evaluate_queen(pos, pos.queen_list(c, i), c, ei);
- // Trapped bishops on a7/h7/a2/h2
- b = pos.bishops(c) & MaskA7H7[c];
- while(b) {
- s = pop_1st_bit(&b);
- evaluate_trapped_bishop_a7h7(pos, s, c, ei);
+ // Special pattern: trapped bishops on a7/h7/a2/h2
+ Bitboard b = pos.bishops(c) & MaskA7H7[c];
+ while (b)
+ {
+ Square s = pop_1st_bit(&b);
+ evaluate_trapped_bishop_a7h7(pos, s, c, ei);
}
- // Trapped bishops on a1/h1/a8/h8 in Chess960:
- if(Chess960) {
- b = pos.bishops(c) & MaskA1H1[c];
- while(b) {
- s = pop_1st_bit(&b);
- evaluate_trapped_bishop_a1h1(pos, s, c, ei);
- }
+ // Special pattern: trapped bishops on a1/h1/a8/h8 in Chess960:
+ if (Chess960)
+ {
+ b = pos.bishops(c) & MaskA1H1[c];
+ while (b)
+ {
+ Square s = pop_1st_bit(&b);
+ evaluate_trapped_bishop_a1h1(pos, s, c, ei);
+ }
}
- ei.attackedBy[c][0] =
- ei.attackedBy[c][PAWN] | ei.attackedBy[c][KNIGHT]
- | ei.attackedBy[c][BISHOP] | ei.attackedBy[c][ROOK]
- | ei.attackedBy[c][QUEEN] | ei.attackedBy[c][KING];
+ // Sum up all attacked squares
+ ei.attackedBy[c][0] = ei.attackedBy[c][PAWN] | ei.attackedBy[c][KNIGHT]
+ | ei.attackedBy[c][BISHOP] | ei.attackedBy[c][ROOK]
+ | ei.attackedBy[c][QUEEN] | ei.attackedBy[c][KING];
}
// Kings. Kings are evaluated after all other pieces for both sides,
// because we need complete attack information for all pieces when computing
// the king safety evaluation.
- for(Color c = WHITE; c <= BLACK; c++) {
- s = pos.king_square(c);
- evaluate_king(pos, s, c, ei);
- }
+ for (Color c = WHITE; c <= BLACK; c++)
+ evaluate_king(pos, pos.king_square(c), c, ei);
// Evaluate passed pawns. We evaluate passed pawns for both sides at once,
// because we need to know which side promotes first in positions where
// both sides have an unstoppable passed pawn.
- if(ei.pi->passed_pawns())
- evaluate_passed_pawns(pos, ei);
+ if (ei.pi->passed_pawns())
+ evaluate_passed_pawns(pos, ei);
- // Middle-game specific evaluation terms
- if(phase > PHASE_ENDGAME) {
+ Phase phase = pos.game_phase();
+ // Middle-game specific evaluation terms
+ if (phase > PHASE_ENDGAME)
+ {
// Pawn storms in positions with opposite castling.
- if(square_file(pos.king_square(WHITE)) >= FILE_E &&
- square_file(pos.king_square(BLACK)) <= FILE_D)
- ei.mgValue +=
- ei.pi->queenside_storm_value(WHITE) -
- ei.pi->kingside_storm_value(BLACK);
- else if(square_file(pos.king_square(WHITE)) <= FILE_D &&
- square_file(pos.king_square(BLACK)) >= FILE_E)
- ei.mgValue +=
- ei.pi->kingside_storm_value(WHITE) -
- ei.pi->queenside_storm_value(BLACK);
+ if ( square_file(pos.king_square(WHITE)) >= FILE_E
+ && square_file(pos.king_square(BLACK)) <= FILE_D)
+
+ ei.mgValue += ei.pi->queenside_storm_value(WHITE)
+ - ei.pi->kingside_storm_value(BLACK);
+
+ else if ( square_file(pos.king_square(WHITE)) <= FILE_D
+ && square_file(pos.king_square(BLACK)) >= FILE_E)
+
+ ei.mgValue += ei.pi->kingside_storm_value(WHITE)
+ - ei.pi->queenside_storm_value(BLACK);
}
// Mobility
// If we don't already have an unusual scale factor, check for opposite
// colored bishop endgames, and use a lower scale for those:
- if(phase < PHASE_MIDGAME && pos.opposite_colored_bishops()
- && ((factor[WHITE] == SCALE_FACTOR_NORMAL && ei.egValue > Value(0)) ||
- (factor[BLACK] == SCALE_FACTOR_NORMAL && ei.egValue < Value(0)))) {
- if(pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK) ==
- 2*BishopValueMidgame) {
- // Only the two bishops
- if(pos.pawn_count(WHITE) + pos.pawn_count(BLACK) == 1) {
- // KBP vs KB with only a single pawn; almost certainly a draw.
- if(factor[WHITE] == SCALE_FACTOR_NORMAL)
- factor[WHITE] = ScaleFactor(8);
- if(factor[BLACK] == SCALE_FACTOR_NORMAL)
- factor[BLACK] = ScaleFactor(8);
- }
- else {
- // At least two pawns
- if(factor[WHITE] == SCALE_FACTOR_NORMAL)
- factor[WHITE] = ScaleFactor(32);
- if(factor[BLACK] == SCALE_FACTOR_NORMAL)
- factor[BLACK] = ScaleFactor(32);
+ if ( phase < PHASE_MIDGAME
+ && pos.opposite_colored_bishops()
+ && ( (factor[WHITE] == SCALE_FACTOR_NORMAL && ei.egValue > Value(0))
+ || (factor[BLACK] == SCALE_FACTOR_NORMAL && ei.egValue < Value(0))))
+ {
+ ScaleFactor sf;
+
+ // Only the two bishops ?
+ if ( pos.non_pawn_material(WHITE) == BishopValueMidgame
+ && pos.non_pawn_material(BLACK) == BishopValueMidgame)
+ {
+ // Check for KBP vs KB with only a single pawn that is almost
+ // certainly a draw or at least two pawns.
+ bool one_pawn = (pos.pawn_count(WHITE) + pos.pawn_count(BLACK) == 1);
+ sf = one_pawn ? ScaleFactor(8) : ScaleFactor(32);
}
- }
- else {
- // Endgame with opposite-colored bishops, but also other pieces.
- // Still a bit drawish, but not as drawish as with only the two
- // bishops.
- if(factor[WHITE] == SCALE_FACTOR_NORMAL)
- factor[WHITE] = ScaleFactor(50);
- if(factor[BLACK] == SCALE_FACTOR_NORMAL)
- factor[BLACK] = ScaleFactor(50);
- }
+ else
+ // Endgame with opposite-colored bishops, but also other pieces. Still
+ // a bit drawish, but not as drawish as with only the two bishops.
+ sf = ScaleFactor(50);
+
+ if (factor[WHITE] == SCALE_FACTOR_NORMAL)
+ factor[WHITE] = sf;
+ if (factor[BLACK] == SCALE_FACTOR_NORMAL)
+ factor[BLACK] = sf;
}
// Interpolate between the middle game and the endgame score, and
- // return:
- Value value = scale_by_game_phase(ei.mgValue, ei.egValue, phase, factor);
+ // return
+ Color stm = pos.side_to_move();
- if(ei.mateThreat[stm] != MOVE_NONE)
- return 8 * QueenValueMidgame - Sign[stm] * value;
- else
- return Sign[stm] * value;
+ Value v = Sign[stm] * scale_by_game_phase(ei.mgValue, ei.egValue, phase, factor);
+
+ return (ei.mateThreat[stm] == MOVE_NONE ? v : 8 * QueenValueMidgame - v);
}
/// read_weights() reads evaluation weights from the corresponding UCI
/// parameters.
-void read_weights(Color sideToMove) {
- WeightMobilityMidgame =
- compute_weight(get_option_value_int("Mobility (Middle Game)"),
- WeightMobilityMidgameInternal);
- WeightMobilityEndgame =
- compute_weight(get_option_value_int("Mobility (Endgame)"),
- WeightMobilityEndgameInternal);
- WeightPawnStructureMidgame =
- compute_weight(get_option_value_int("Pawn Structure (Middle Game)"),
- WeightPawnStructureMidgameInternal);
- WeightPawnStructureEndgame =
- compute_weight(get_option_value_int("Pawn Structure (Endgame)"),
- WeightPawnStructureEndgameInternal);
- WeightPassedPawnsMidgame =
- compute_weight(get_option_value_int("Passed Pawns (Middle Game)"),
- WeightPassedPawnsMidgameInternal);
- WeightPassedPawnsEndgame =
- compute_weight(get_option_value_int("Passed Pawns (Endgame)"),
- WeightPassedPawnsEndgameInternal);
- WeightKingSafety[sideToMove] =
- compute_weight(get_option_value_int("Cowardice"), WeightKingSafetyInternal);
- WeightKingSafety[opposite_color(sideToMove)] =
- compute_weight(get_option_value_int("Aggressiveness"),
- WeightKingSafetyInternal);
- WeightKingSafety[opposite_color(sideToMove)] =
- (get_option_value_int("Aggressiveness") * 0x100) / 100;
+void read_weights(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);
+
+ Color them = opposite_color(us);
+
+ WeightKingSafety[us] = weight_option("Cowardice", WeightKingSafetyInternal);
+ WeightKingSafety[them] = weight_option("Aggressiveness", WeightKingOppSafetyInternal);
init_safety();
}
Color them = opposite_color(us);
// King attack
- if (b & ei.attackZone[us])
+ if (b & ei.kingZone[us])
{
- ei.attackCount[us]++;
- ei.attackWeight[us] += AttackWeight;
+ ei.kingAttackersCount[us]++;
+ ei.kingAttackersWeight[us] += AttackWeight;
Bitboard bb = (b & ei.attackedBy[them][KING]);
if (bb)
- ei.attacked[us] += count_1s_max_15(bb);
+ ei.kingZoneAttacksCount[us] += count_1s_max_15(bb);
}
// Mobility
// king has lost right to castle
if (mob > 6 || ei.pi->file_is_half_open(us, f))
return;
-
+
Square ksq = p.king_square(us);
+
if ( square_file(ksq) >= FILE_E
&& square_file(s) > square_file(ksq)
&& (relative_rank(us, ksq) == RANK_1 || square_rank(ksq) == square_rank(s)))
// King safety. This is quite complicated, and is almost certainly far
// from optimally tuned.
Color them = opposite_color(us);
- if(p.queen_count(them) >= 1 && ei.attackCount[them] >= 2
+ if(p.queen_count(them) >= 1 && ei.kingAttackersCount[them] >= 2
&& p.non_pawn_material(them) >= QueenValueMidgame + RookValueMidgame
- && ei.attacked[them]) {
+ && ei.kingZoneAttacksCount[them]) {
// Is it the attackers turn to move?
bool sente = (them == p.side_to_move());
// undefended squares around the king, the square of the king, and the
// quality of the pawn shelter.
int attackUnits =
- Min((ei.attackCount[them] * ei.attackWeight[them]) / 2, 25)
- + (ei.attacked[them] + count_1s_max_15(undefended)) * 3
+ Min((ei.kingAttackersCount[them] * ei.kingAttackersWeight[them]) / 2, 25)
+ + (ei.kingZoneAttacksCount[them] + count_1s_max_15(undefended)) * 3
+ InitKingDanger[relative_square(us, s)] - shelter / 32;
// Analyse safe queen contact checks:
void evaluate_trapped_bishop_a7h7(const Position &pos, Square s, Color us,
EvalInfo &ei) {
- Piece pawn = pawn_of_color(opposite_color(us));
- Square b6, b8;
assert(square_is_ok(s));
assert(pos.piece_on(s) == bishop_of_color(us));
- if(square_file(s) == FILE_A) {
- b6 = relative_square(us, SQ_B6);
- b8 = relative_square(us, SQ_B8);
- }
- else {
- b6 = relative_square(us, SQ_G6);
- b8 = relative_square(us, SQ_G8);
- }
+ Square b6 = relative_square(us, (square_file(s) == FILE_A) ? SQ_B6 : SQ_G6);
+ Square b8 = relative_square(us, (square_file(s) == FILE_A) ? SQ_B8 : SQ_G8);
- if(pos.piece_on(b6) == pawn && pos.see(s, b6) < 0 && pos.see(s, b8) < 0) {
- ei.mgValue -= Sign[us] * TrappedBishopA7H7Penalty;
- ei.egValue -= Sign[us] * TrappedBishopA7H7Penalty;
+ if ( pos.piece_on(b6) == pawn_of_color(opposite_color(us))
+ && pos.see(s, b6) < 0
+ && pos.see(s, b8) < 0)
+ {
+ ei.mgValue -= Sign[us] * TrappedBishopA7H7Penalty;
+ ei.egValue -= Sign[us] * TrappedBishopA7H7Penalty;
}
-
}
// ScaleFactor array.
Value scale_by_game_phase(Value mv, Value ev, Phase ph, ScaleFactor sf[]) {
+
assert(mv > -VALUE_INFINITE && mv < VALUE_INFINITE);
assert(ev > -VALUE_INFINITE && ev < VALUE_INFINITE);
assert(ph >= PHASE_ENDGAME && ph <= PHASE_MIDGAME);
- if(ev > Value(0))
- ev = apply_scale_factor(ev, sf[WHITE]);
- else
- ev = apply_scale_factor(ev, sf[BLACK]);
+ ev = apply_scale_factor(ev, sf[(ev > Value(0) ? WHITE : BLACK)]);
+
+ // Linearized sigmoid interpolator
+ int sph = int(ph);
+ sph -= (64 - sph) / 4;
+ sph = Min(PHASE_MIDGAME, Max(PHASE_ENDGAME, sph));
- // Superlinear interpolator
- int sli_ph = int(ph);
- sli_ph -= (64 - sli_ph) / 4;
- sli_ph = Min(PHASE_MIDGAME, Max(PHASE_ENDGAME, sli_ph)); // ceiling
+ Value result = Value(int((mv * sph + ev * (128 - sph)) / 128));
- Value result = Value(int((mv * sli_ph + ev * (128 - sli_ph)) / 128));
return Value(int(result) & ~(GrainSize - 1));
}
}
+ // helper used in read_weights()
+ int weight_option(const std::string& opt, int weight) {
+
+ return compute_weight(get_option_value_int(opt), weight);
+ }
+
+
// init_safety() initizes the king safety evaluation, based on UCI
// parameters. It is called from read_weights().
void init_safety() {
- double a, b;
- int maxSlope, peak, i, j;
QueenContactCheckBonus = get_option_value_int("Queen Contact Check Bonus");
- RookContactCheckBonus = get_option_value_int("Rook Contact Check Bonus");
- QueenCheckBonus = get_option_value_int("Queen Check Bonus");
- RookCheckBonus = get_option_value_int("Rook Check Bonus");
- BishopCheckBonus = get_option_value_int("Bishop Check Bonus");
- KnightCheckBonus = get_option_value_int("Knight Check Bonus");
- DiscoveredCheckBonus = get_option_value_int("Discovered Check Bonus");
- MateThreatBonus = get_option_value_int("Mate Threat Bonus");
-
- a = get_option_value_int("King Safety Coefficient") / 100.0;
- b = get_option_value_int("King Safety X Intercept") * 1.0;
- maxSlope = get_option_value_int("King Safety Max Slope");
- peak = (get_option_value_int("King Safety Max Value") * 256) / 100;
-
- for(i = 0; i < 100; i++) {
- if(i < b) SafetyTable[i] = Value(0);
- else if(get_option_value_string("King Safety Curve") == "Quadratic")
- SafetyTable[i] = Value((int)(a * (i - b) * (i - b)));
- else if(get_option_value_string("King Safety Curve") == "Linear")
- SafetyTable[i] = Value((int)(100 * a * (i - b)));
+ RookContactCheckBonus = get_option_value_int("Rook Contact Check Bonus");
+ QueenCheckBonus = get_option_value_int("Queen Check Bonus");
+ RookCheckBonus = get_option_value_int("Rook Check Bonus");
+ BishopCheckBonus = get_option_value_int("Bishop Check Bonus");
+ KnightCheckBonus = get_option_value_int("Knight Check Bonus");
+ DiscoveredCheckBonus = get_option_value_int("Discovered Check Bonus");
+ MateThreatBonus = get_option_value_int("Mate Threat Bonus");
+
+ int maxSlope = get_option_value_int("King Safety Max Slope");
+ int peak = get_option_value_int("King Safety Max Value") * 256 / 100;
+ double a = get_option_value_int("King Safety Coefficient") / 100.0;
+ double b = get_option_value_int("King Safety X Intercept");
+ bool quad = (get_option_value_string("King Safety Curve") == "Quadratic");
+ bool linear = (get_option_value_string("King Safety Curve") == "Linear");
+
+ for (int i = 0; i < 100; i++)
+ {
+ if (i < b)
+ SafetyTable[i] = Value(0);
+ else if(quad)
+ SafetyTable[i] = Value((int)(a * (i - b) * (i - b)));
+ else if(linear)
+ SafetyTable[i] = Value((int)(100 * a * (i - b)));
}
- for(i = 0; i < 100; i++)
- if(SafetyTable[i+1] - SafetyTable[i] > maxSlope) {
- for(j = i + 1; j < 100; j++)
- SafetyTable[j] = SafetyTable[j-1] + Value(maxSlope);
- }
- for(i = 0; i < 100; i++)
- if(SafetyTable[i] > Value(peak))
- SafetyTable[i] = Value(peak);
+ for (int i = 0; i < 100; i++)
+ {
+ if (SafetyTable[i+1] - SafetyTable[i] > maxSlope)
+ for (int j = i + 1; j < 100; j++)
+ SafetyTable[j] = SafetyTable[j-1] + Value(maxSlope);
+
+ if (SafetyTable[i] > Value(peak))
+ SafetyTable[i] = Value(peak);
+ }
}
}
projects / stockfish / blobdiff