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087b638)
Instead of using hard coded Min and Max values for history,
always adjust the old value slightly downwards before adding a new value.
The adjustment acts like gravity that prevents the value escaping too
far from zero.
Bench:
8020484
Resolves #407
template<typename T>
struct Stats {
template<typename T>
struct Stats {
- static const Value Max = Value(250);
+ static const Value Max = Value(1<<28);
const T* operator[](Piece pc) const { return table[pc]; }
T* operator[](Piece pc) { return table[pc]; }
const T* operator[](Piece pc) const { return table[pc]; }
T* operator[](Piece pc) { return table[pc]; }
void update(Piece pc, Square to, Value v) {
void update(Piece pc, Square to, Value v) {
- if (abs(table[pc][to] + v) < Max)
- table[pc][to] += v;
+ table[pc][to] -= table[pc][to] * std::min(abs(int(v)), 512) / 512;
+ table[pc][to] += int(v) * 64;