NCM plays each Stockfish dev build 20,000 times against Stockfish 7. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.
| Host | Duration | Avg Base NPS | Games | Wins | Losses | Draws | Elo |
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| ID | Host | Started (UTC) | Duration | Base NPS | Games | Wins | Losses | Draws | Elo | CLI | PGN |
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| Commit ID | 512a4e4ff044aeddebc0df42b7fbabb365f9a22d |
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| Author | Marco Costalba |
| Date | 2010-02-20 17:29:53 UTC |
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Recursive lock all split point's chain
When we found a cut-off then lock all the split point chain,
not only current one to avoid races in case two threads running
on different split points where one is ancestor then the other,
find a beta cut-off at the same time, in this case we want only
one to call sp_update_pv().
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
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