QRelaxChess 10.4 released

[Richard1964]

The new version of QRelaxChess is released
Changes:
- Windows version runs now on latest QT6 libraries
- Chess pieces position bug running using high screen resolution >= (1600 x 900) fixed
- Standard paths fixes (all relaxchess relating files in one place)
- Chess engine fixes, looks unbreakable. Changes especially in expert mode making thinking more forward

Have a look self on video how it plays now :

https://www.linkedin.com/posts/ryszard- ... er_desktop

The windows version available here https://sowl.co/6hf6z
Linux version https://sowl.co/hdmWG

[Richard1964]

Besides that chess engine for Windows is being built now using Intel compiler , 10 % beter performance than Microsoft.

[Richard1964]

Sample pgn file of relaxchess 10.4
[pgn]1. Nf3 b6 2. g3 Bb7 3. Bg2 g6 4. d4 Bxf3 5. exf3 Bg7 6. f4 c6 7. O-O e6 8. c4 Ne7 9. a4 O-O 10. Be4 d5 11. cxd5 cxd5 12. Bf3 Nbc6 13. Be3 Nf5 14. Qc1 Ncxd4 15. Bxd4 Nxd4 16. Bd1 e5 17. fxe5 Bxe5 18. f4 Bd6 19. Nc3 Bc5 20. Nb5 Nb3+ 21. Nd4 Nxc1 22. Rxc1 Bxd4+ 23. Rf2 Bxf2+ 24. Kxf2 h5 25. Rc6 d4 26. Bc2 d3 27. Bb3 g5 28. Rg6+ Kh7 29. Rxg5 Rb8 30. Rxh5+ Kg7 31. h4 d2 32. Bd5 d1=Q 33. Rg5+ Kh6 34. b3 Qe8 35. g4 Qde2+ 36. Kg3 Q8e3+ 37. Bf3 Q3xf3[/pgn]

[Richard1964]

I have measured also performance of RElaxChess engine on my current E6420 Dell laptop (4 cores,2.6 Ghz)
On Linux (8 threads) 17000 knt/s
On Windows 10 (8 threads) 8000 knt/s

[Krzysztof Grzelak]

I have measured also performance of RElaxChess engine on my current E6420 Dell laptop (4 cores,2.6 Ghz)
On Linux (8 threads) 17000 knt/s
On Windows 10 (8 threads) 8000 knt/s

Why such a big difference.

[Richard1964]

Do not know yet, anyhow not a compiler (tried 3)

[Richard1964]

I have done a lot of tests, and found out that it has to do with cache, it works different on Linux and Windows, RelaxChess engine is strong oo implemented and some functions are in loop thousands f time with different parameters called. It looks that Linus cache also partially some pieces of code and not only functions. I have manages thanks to C++ pointers the code resulting in almost the same score on Linux and Windows (147 / 152 ms), so the through output of Windows will be also about 17000. I will release it next week now celebrate it

[Richard1964]

RelaxChess 10.5 (Power) is just released try it out this game
Windows : https://sowl.co/s/6hf6z (product info) , https://sowl.co/6hf6z (purchase link)
Linux :https://sowl.co/s/hdmWG (product info) , https://sowl.co/hdmWG (purchase link)

[Richard1964]

Online game playing 10.5 engine https://www.linkedin.com/posts/ryszard- ... er_desktop

[Richard1964]

Here recorded game between RelaxChess 10.5 and previous version of a game. Current version (playing white) is much stronger , RelaxChess has 4 predefined themes but You can also generate your own based on your picture as on video. The theme on video is based on Pink Floyd music without that and other it would not be possible to create this game. RelaxChess does not not use your space and do not use AI!.
https://www.youtube.com/watch?v=2pHr9Y5pjEE