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Increase weight for supported pawns #2326

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Commits on Sep 24, 2019

  1. Increase weight for supported pawns

    This patch changes the weight for counting supports of pawns
    from 17 to 21. Hopefully Stockfish will accept to play a bit
    more of closed or semi-closed positions.
    
    STC:
    LLR: 2.95 (-2.94,2.94) [0.00,4.00]
    Total: 13822 W: 3158 L: 2939 D: 7725
    http://tests.stockfishchess.org/tests/view/5d89c3a10ebc595091802379
    
    LTC:
    LLR: 2.96 (-2.94,2.94) [0.00,4.00]
    Total: 63066 W: 10590 L: 10236 D: 42240
    http://tests.stockfishchess.org/tests/view/5d89ca7f0ebc595091802680
    
    Future work: try to tweak the evaluation to better understand
    the French structures.
    
    Bench: 3618154
    snicolet committed Sep 24, 2019
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