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Do not use SEE in evasion scoring

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Idea by Aram Tumanian (atumanian)

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 43889 W: 7849 L: 7767 D: 28273

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 29333 W: 3809 L: 3700 D: 21824

Bench: 6421663
This commit is contained in:
Stéphane Nicolet 2016-10-06 00:00:27 +02:00
parent 0162fb83c2
commit 1e586288ca
1 changed files with 2 additions and 8 deletions
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10
src/movepick.cpp
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@ -159,19 +159,13 @@ void MovePicker::score<QUIETS>() {
template<>
void MovePicker::score<EVASIONS>() {
// Try winning and equal captures ordered by MVV/LVA, then non-captures ordered
// by history value, then bad captures and quiet moves with a negative SEE ordered
// by SEE value.
// Try captures ordered by MVV/LVA, then non-captures ordered by history value
const HistoryStats& history = pos.this_thread()->history;
const FromToStats& fromTo = pos.this_thread()->fromTo;
Color c = pos.side_to_move();
Value see;
for (auto& m : *this)
if ((see = pos.see_sign(m)) < VALUE_ZERO)
m.value = see - HistoryStats::Max; // At the bottom
else if (pos.capture(m))
if (pos.capture(m))
m.value = PieceValue[MG][pos.piece_on(to_sq(m))]
- Value(type_of(pos.moved_piece(m))) + HistoryStats::Max;
else