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Revert "IID in pv also when TT move depth is too small"

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After almost 900 games we are at -2 ELO

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-11-07 19:45:13 +01:00
parent 15ec3e911e
commit 5e112f16da
1 changed files with 2 additions and 5 deletions
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7
src/search.cpp
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@ -1103,11 +1103,8 @@ namespace {
tte = TT.retrieve(pos.get_key()); tte = TT.retrieve(pos.get_key());
ttMove = (tte ? tte->move() : MOVE_NONE); ttMove = (tte ? tte->move() : MOVE_NONE);
// Go with internal iterative deepening if we don't have a TT move or // Go with internal iterative deepening if we don't have a TT move
// if search depth is more then 4*OnePly higher then TT move depth. if (UseIIDAtPVNodes && ttMove == MOVE_NONE && depth >= 5*OnePly)
if ( UseIIDAtPVNodes
&& depth >= 5*OnePly
&&(!ttMove || depth > tte->depth() + 4*OnePly))
{ {
search_pv(pos, ss, alpha, beta, depth-2*OnePly, ply, threadID); search_pv(pos, ss, alpha, beta, depth-2*OnePly, ply, threadID);
ttMove = ss[ply].pv[ply]; ttMove = ss[ply].pv[ply];