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 Latest abrok Development Version November 16th (SF The gift that keeps on giving )

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Latest abrok Development Version   November 16th (SF The gift that keeps on giving ) 93-65

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PostSubject: Latest abrok Development Version November 16th (SF The gift that keeps on giving )   Latest abrok Development Version   November 16th (SF The gift that keeps on giving ) EmptySun Nov 17, 2019 10:56 am

!! latest version !!


Windows x64 for Haswell CPUs
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for Haswell CPUs
Linux x64 for modern computers
Linux x64
Author: Vizvezdenec
Date: Sat Nov 16 17:29:53 2019 +0100
Timestamp: 1573921793

Introduce king flank defenders

This patch implements what we have been trying for quite some time -
dependance of kingdanger on balance of attackers and defenders of king
flank, to avoid overestimate attacking power if the opponent has enough
defenders of king position. We already have some form of it in bishop
and knight defenders - this is further work in this direction.

What to do based on this?

1) constant 4 is arbitrary, maybe it is not optimal
2) maybe we can use quadratic formula as in kingflankattack
3) simplification into alrealy existing terms is always a possibility :)
4) overall kingdanger tuning always can be done.

passed STC:
http://tests.stockfishchess.org/tests/view/5dcf40560ebc590256325f30
LLR: 2.96 (-2.94,2.94) [-1.50,4.50]
Total: 26298 W: 5819 L: 5632 D: 14847 Elo +2.47

passed LTC:
http://tests.stockfishchess.org/tests/view/5dcfa5760ebc590256326464
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 30600 W: 5042 L: 4784 D: 20774 Elo +2.93

Closes https://github.com/official-stockfish/Stockfish/pull/2415

Bench: 4496847

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