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@VoyagerOne
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Increase reduction if tt-move is a capture.
The idea is that chances are the tt-move is best and will be difficult to raise alpha when playing a quiet move.

STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 7582 W: 1415 L: 1259 D: 4908

LTC:
LLR: 2.97 (-2.94,2.94) [0.00,5.00]
Total: 59553 W: 7885 L: 7573 D: 44095

Bench: 5725676

@joergoster
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Maybe this can be simplified to

      if (move == ttMove && captureOrPromotion)
          ttCapture = true;

@zamar zamar closed this in 7734212 Jun 21, 2017
SapphireBrand pushed a commit to SapphireBrand/Stockfish that referenced this pull request Jun 27, 2017
The idea is that chances are the tt-move is best and will be difficult to raise alpha when playing a quiet move.

STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 7582 W: 1415 L: 1259 D: 4908

LTC:
LLR: 2.97 (-2.94,2.94) [0.00,5.00]
Total: 59553 W: 7885 L: 7573 D: 44095

Bench: 5725676

Closes official-stockfish#1147
SapphireBrand pushed a commit to SapphireBrand/Stockfish that referenced this pull request Jun 27, 2017
The idea is that chances are the tt-move is best and will be difficult to raise alpha when playing a quiet move.

STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 7582 W: 1415 L: 1259 D: 4908

LTC:
LLR: 2.97 (-2.94,2.94) [0.00,5.00]
Total: 59553 W: 7885 L: 7573 D: 44095

Bench: 5725676

Closes official-stockfish#1147
pb00068 referenced this pull request in pb00068/Stockfish Jun 28, 2017
@VoyagerOne VoyagerOne deleted the ttCapture branch December 25, 2017 17:25
MichaelB7 pushed a commit to MichaelB7/Stockfish that referenced this pull request Apr 23, 2020
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2 participants