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Two simplifications in passed pawns evaluation #1769

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protonspring
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These two simplifications appear to be affecting and/or offsetting each other. Neither can be removed independently, but in combination they pass -3,1.

STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 36391 W: 7888 L: 7795 D: 20708
http://tests.stockfishchess.org/tests/view/5b9bce410ebc592cf275f1b2

LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 19513 W: 3237 L: 3114 D: 13162
http://tests.stockfishchess.org/tests/view/5b9c0edf0ebc592cf275f80e

bench 4722355

bench 4722355
@Rocky640
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You say that neither can be removed independently, but you had some greens here
STC http://tests.stockfishchess.org/tests/view/5b92910d0ebc592cf2753bf6
LTC http://tests.stockfishchess.org/tests/view/5b92acae0ebc592cf2753ebb

But indeed your new result is stronger,

@protonspring
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protonspring commented Sep 15, 2018 via email

@NKONSTANTAKIS
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This is a superb simplification, lets submit it? Is the failed travis ci a problem?

Rocky640 referenced this pull request in MJZ1977/Stockfish Sep 26, 2018
@snicolet snicolet changed the title remove 2. Two simplifications in passed pawns evaluation Sep 27, 2018
@snicolet snicolet closed this in 13d06ed Sep 27, 2018
@snicolet
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Merged via 13d06ed, congrats!

@snicolet
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Just an interim commit waiting for the return of Stefan Geschwentner. I hope he is well!

lantonov pushed a commit to lantonov/Stockfish that referenced this pull request Sep 30, 2018
These two simplifications appear to be affecting and/or offsetting each other.
Neither can be removed independently, but in combination they pass -3,1.

STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 36391 W: 7888 L: 7795 D: 20708
http://tests.stockfishchess.org/tests/view/5b9bce410ebc592cf275f1b2

LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 19513 W: 3237 L: 3114 D: 13162
http://tests.stockfishchess.org/tests/view/5b9c0edf0ebc592cf275f80e

Closes official-stockfish#1769

bench 4059356
mstembera pushed a commit to mstembera/Stockfish that referenced this pull request Oct 18, 2018
These two simplifications appear to be affecting and/or offsetting each other.
Neither can be removed independently, but in combination they pass -3,1.

STC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 36391 W: 7888 L: 7795 D: 20708
http://tests.stockfishchess.org/tests/view/5b9bce410ebc592cf275f1b2

LTC
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 19513 W: 3237 L: 3114 D: 13162
http://tests.stockfishchess.org/tests/view/5b9c0edf0ebc592cf275f80e

Closes official-stockfish#1769

bench 4059356
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4 participants