Instead of piece-from-to, in this way it is similar
to what we already do for history.
Almost no change, but seems a bit simpler in this way.
After 995 games at 1+0
Mod vs Orig +207 =596 -192 +5 ELO
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
void History::clear() {
memset(history, 0, 2 * 8 * 64 * sizeof(int));
void History::clear() {
memset(history, 0, 2 * 8 * 64 * sizeof(int));
- memset(maxStaticValueDelta, 0, 16 * 64 * 64 * sizeof(int));
+ memset(maxStaticValueDelta, 0, 2 * 8 * 64 * sizeof(int));
/// gain of a move given the delta of the static position evaluations
/// before and after the move.
/// gain of a move given the delta of the static position evaluations
/// before and after the move.
-void History::set_gain(Piece p, Square from, Square to, Value delta)
+void History::set_gain(Piece p, Square to, Value delta)
- if (delta >= maxStaticValueDelta[p][from][to])
- maxStaticValueDelta[p][from][to] = delta;
+ if (delta >= maxStaticValueDelta[p][to])
+ maxStaticValueDelta[p][to] = delta;
- maxStaticValueDelta[p][from][to]--;
+ maxStaticValueDelta[p][to]--;
-Value History::gain(Piece p, Square from, Square to) const
+Value History::gain(Piece p, Square to) const
- return Value(maxStaticValueDelta[p][from][to]);
+ return Value(maxStaticValueDelta[p][to]);
void success(Piece p, Square to, Depth d);
void failure(Piece p, Square to, Depth d);
int move_ordering_score(Piece p, Square to) const;
void success(Piece p, Square to, Depth d);
void failure(Piece p, Square to, Depth d);
int move_ordering_score(Piece p, Square to) const;
- void set_gain(Piece p, Square from, Square to, Value delta);
- Value gain(Piece p, Square from, Square to) const;
+ void set_gain(Piece p, Square to, Value delta);
+ Value gain(Piece p, Square to) const;
private:
int history[16][64]; // [piece][square]
private:
int history[16][64]; // [piece][square]
- int maxStaticValueDelta[16][64][64]; // [piece][from_square][to_square]
+ int maxStaticValueDelta[16][64]; // [piece][from_square][to_square]
if (predictedDepth >= OnePly)
preFutilityValueMargin = FutilityMargins[int(predictedDepth)];
if (predictedDepth >= OnePly)
preFutilityValueMargin = FutilityMargins[int(predictedDepth)];
- preFutilityValueMargin += H.gain(pos.piece_on(move_from(move)), move_from(move), move_to(move)) + 45;
+ preFutilityValueMargin += H.gain(pos.piece_on(move_from(move)), move_to(move)) + 45;
futilityValueScaled = ss[ply].eval + preFutilityValueMargin - moveCount * IncrementalFutilityMargin;
futilityValueScaled = ss[ply].eval + preFutilityValueMargin - moveCount * IncrementalFutilityMargin;
&& pos.captured_piece() == NO_PIECE_TYPE
&& !move_is_castle(m)
&& !move_is_promotion(m))
&& pos.captured_piece() == NO_PIECE_TYPE
&& !move_is_castle(m)
&& !move_is_promotion(m))
- H.set_gain(pos.piece_on(move_to(m)), move_from(m), move_to(m), -(before + after));
+ H.set_gain(pos.piece_on(move_to(m)), move_to(m), -(before + after));