Blog "Chess Engines Diary" - needs a new laptop for chess engine tests

♔ We use for testing only 2 old laptops:
1. Acer - Intel Core i3-3217U ( 5 years old)
2. Lenovo - Intel Core i7-4710MQ is over 3 years old (He works 24 hours a day)
♕♞ A modern laptop that will be designed only for chess engine tests costs (with software) about $ 1000-1200 (4200-4500 PLN). We will no longer invest private money, and chess engine testing costs are big. That is why we are starting the collection for the purchase of a laptop for testing.

♕ Our blog "Chess Engines Diary" is visited by around 2,000-3.000 users daily. If only everyone paid 1 dollar - we will pay the required amount in one day!


Saturday, November 11, 2017

Stockfish 17111113 - new version!

Stockfish, chess engine UCI

Rating JCER = 3395
🔬 Author: Rocky640

Timestamp: 1510403849 

Simplify some kingring penalties expressions 

The new "weak" expression helps simplify the safe check calculations for rooks or minors, (but the end result for all the safe checks is the exactly the same as in current master) 

The only functional change is for the "outer king ring" (for example, squares f3 g3 h3 when white king is on g1). In current master, there was a 191 penalty if any of these was not defended at all. 
With this pr, there is this 191 penalty if any of these is not defended at all or is only defended by a white queen. 

Tested as a simplification 
LLR: 2.96 (-2.94,2.94) [-3.00,1.00] 
Total: 66167 W: 12015 L: 11971 D: 42181 
(against master (Update Copyright year inMakefile)) 

LLR: 2.96 (-2.94,2.94) [-3.00,1.00] 
Total: 15790 W: 2095 L: 1968 D: 11727 
(against master (Handle BxN trade as good capture when history scor)) 

same as #1296 but rebased on latest master 
bench: 5109559

⭐⭐⭐   Stockfish 17111113 - download

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