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Chess engine: Stockfish 19111311

on
Stockfish - UCI chess engine
Interesting compiled by SFisGOD

 Rank-based outposts 

 Introduce OutpostRank[RANK_NB] which contains a bonus according to the rank of the outpost. We use it for the primary Outpost bonus. The values are based on the trends of the SPSA tuning run with some manual tweaks. 

 Passed STC: 
LLR: 2.96 (-2.94,2.94) [-1.50,4.50] 
Total: 27454 W: 6059 L: 5869 D: 15526 Elo +2.40

Passed LTC: 
LLR: 2.94 (-2.94,2.94) [0.00,3.50] 
Total: 57950 W: 9443 L: 9112 D: 39395 Elo +1.98

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The inspiration for this patch came from Stefan Geschwentner's attempt of modifying BishopPawns into a rank-based penalty. Michael Stembera suggested that maybe the S(0, 0) ranks (3rd, 7th and also maybe 8th) can still be tuned. This would expand our definition of Outpost and 
OutpostRanks would be removed altogether. Special thanks to Mark Tenzer for all the help and excellent suggestions. 


Rating JCER=3257

 Stockfish 19111311 - download


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