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Simplify StatSCore Initialization

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No need to initialize StatScore at rootNode. Current Logic is redundant because at subsequent levels the grandchildren statScore is initialized to zero.

closes https://github.com/official-stockfish/Stockfish/pull/3122

Non functional change.
This commit is contained in:
mckx00 2020-09-13 19:28:32 -07:00 • committed by Joost VandeVondele
parent 0405f35403
commit 35ab8254b7
1 changed files with 1 additions and 3 deletions
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4
src/search.cpp
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@ -654,9 +654,7 @@ namespace {
// starts with statScore = 0. Later grandchildren start with the last calculated // starts with statScore = 0. Later grandchildren start with the last calculated
// statScore of the previous grandchild. This influences the reduction rules in // statScore of the previous grandchild. This influences the reduction rules in
// LMR which are based on the statScore of parent position. // LMR which are based on the statScore of parent position.
if (rootNode) if (!rootNode)
(ss+4)->statScore = 0;
else
(ss+2)->statScore = 0; (ss+2)->statScore = 0;
// Step 4. Transposition table lookup. We don't want the score of a partial // Step 4. Transposition table lookup. We don't want the score of a partial