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Re-enable TT.insert_pv()

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This time make sure that valuable TTentries are not overwritten.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Joona Kiiski
2009-12-08 19:19:13 +02:00
committed by Marco Costalba
parent d0b8bc5fdf
commit b056e5d40a
2 changed files with 4 additions and 2 deletions
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2
src/search.cpp
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@@ -743,7 +743,7 @@ namespace {
// Write PV to transposition table, in case the relevant entries have // Write PV to transposition table, in case the relevant entries have
// been overwritten during the search. // been overwritten during the search.
//TT.insert_pv(p, ss[0].pv); TT.insert_pv(p, ss[0].pv);
if (AbortSearch) if (AbortSearch)
break; // Value cannot be trusted. Break out immediately! break; // Value cannot be trusted. Break out immediately!

4
src/tt.cpp
View File

@@ -208,7 +208,9 @@ void TranspositionTable::insert_pv(const Position& pos, Move pv[]) {
for (int i = 0; pv[i] != MOVE_NONE; i++) for (int i = 0; pv[i] != MOVE_NONE; i++)
{ {
store(p.get_key(), VALUE_NONE, VALUE_TYPE_NONE, Depth(-127*OnePly), pv[i]); TTEntry *tte = retrieve(p.get_key());
if (!tte || tte->move() != pv[i])
store(p.get_key(), VALUE_NONE, VALUE_TYPE_NONE, Depth(-127*OnePly), pv[i]);
p.do_move(pv[i], st); p.do_move(pv[i], st);
} }
} }