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Revert evaluation cache

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And return on using TT as backing store for position
evaluations.

Tests (even on single thread) show eval cache was a regression.
In multi thread result should be even worst because eval cache
is a per-thread struct, while TT is shared.

After 4957 games at 15"+0.05 (single thread)
eval cache vs master 969 - 1093 - 2895  -9 ELO

So previous reported result of +18 ELO was probably due to an
issue in the testing framework (a bug in cutechess-cli) that
has been fixed in the meanwhile.

bench: 5386711
This commit is contained in:
Marco Costalba
2012-12-27 12:13:31 +01:00
parent f78b68b7ff
commit 3cf6471738
6 changed files with 61 additions and 57 deletions
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6
src/tt.cpp
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@@ -82,7 +82,7 @@ void TranspositionTable::clear() {
/// more valuable than a TTEntry t2 if t1 is from the current search and t2 is from
/// a previous search, or if the depth of t1 is bigger than the depth of t2.
void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move m) {
void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move m, Value statV, Value kingD) {
int c1, c2, c3;
TTEntry *tte, *replace;
@@ -98,7 +98,7 @@ void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move
if (m == MOVE_NONE)
m = tte->move();
tte->save(posKey32, v, t, d, m, generation);
tte->save(posKey32, v, t, d, m, generation, statV, kingD);
return;
}
@@ -110,7 +110,7 @@ void TranspositionTable::store(const Key posKey, Value v, Bound t, Depth d, Move
if (c1 + c2 + c3 > 0)
replace = tte;
}
replace->save(posKey32, v, t, d, m, generation);
replace->save(posKey32, v, t, d, m, generation, statV, kingD);
}