Doubleheader coming up

[MikeB]

Aristides-v2 will be jointly released at the same time as SF-McB-v2.7 in the next few weeks. Based on Cfish, a very nicely done port of Stockfish in C by the syzygy tablebase author Ronald De Man, it runs about 10% faster than standard Stockfish , Aristides also has some added McB features like play by ELO, fast play , terminal keyboard shortcuts and search tweaks to solve some positions that Stockfish has a very hard time with - but not as many tweaks that McB has - so it will play very strong, stronger than McB I think - not enough games to say for sure - but here's an example of play in a 5 min 3 sec inc game:

I always enjoy the black side wins the most in comp vs comp.

[pgn][Event "Computer chess game"]
[Site "Mac-Pro"]
[Date "Wed Aug 9 23:41:59 2017"]
[Round "3"]
[White "SF-McBrain 2.7f 64 POPCN"]
[Black "Aristides v2.0 64 POPCNT"]
[Result "0-1"]
[TimeControl "30000+300"]
[FEN "r1b1kbnr/pppp1ppp/2n2q2/4p2Q/2B1P3/8/PPPP1PPP/RNB1K1NR w KQkq - c0 2;
"]

1. Nf3 g6 2. Qg5 Bh6 3. Qxf6 Nxf6 4. Nc3 d6 5. d3 Bxc1 6. Rxc1
Bd7 7. a4 a6 8. Nd5 Nxd5 9. Bxd5 Nb4 10. Bb3 O-O 11. h4 a5 12.
h5 Kg7 13. h6+ Kf6 14. Kd2 Na6 15. Bd5 Nc5 16. b3 c6 17. Bc4
Bg4 18. Ng1 Be6 19. Bxe6 Nxe6 20. Ne2 Ke7 21. Rb1 f5 22. exf5
gxf5 23. g3 Kf6 24. c3 b5 25. d4 Rfb8 26. dxe5+ dxe5 27. Rhd1
bxa4 28. bxa4 Nc5 29. Kc2 Ke6 30. f4 Rxb1 31. Rxb1 Rg8 32. Rb6
exf4 33. Rxc6+ Kd5 34. Rf6 f3 35. Nd4 Ke4 36. Rxf5 Ne6 37. Rf7
Nxd4+ 38. cxd4 Ke3 39. Rxh7 f2 40. Re7+ Kf3 41. Rf7+ Kg2 42.
d5 f1=Q 43. Rxf1 Kxf1 44. Kd3 Kf2 45. Ke4 Rh8 46. g4 Rxh6 47.
Ke5 Rg6 48. Kf5 Rb6 49. g5 Ke3 50. Ke5 Rg6 51. Kf5 Rg8 52. d6
Kd4 53. Kf6 Kc5 54. d7 Kd6 55. Kf7 Rd8 56. g6 Rxd7+ 57. Kf6 Rc7
58. Kf5 Kc5 59. Ke4 Kb4 60. Kf5 Kxa4 61. Ke5 Kb4 62. Kf6 a4 63.
g7 Rxg7 64. Kxg7 a3 65. Kf6 a2 66. Ke5 a1=Q+ 67. Ke6 Qd4 68.
Kf5 Kc4 69. Kg6 Qg4+ 70. Kf7 Kc5 71. Kf8 Kd6 72. Kf7 Qg5 73.
Kf8 Ke6 74. Ke8 Qe7# 0-1 {White Checkmated} [/pgn]

Engines at this level get a lot of draws in 5 min 3 sec increment games - but here's a test run in progress with all 3 engines dev-SF, dev-SF-McB and Aristides-v2

Code: Select all

Date: 08/09/17 : 23:55:52
25 game(s) loaded
Rank Name                      Rating   Δ     +    -     #     Σ    Σ%     W    L    D   W%    =%   OppR 
---------------------------------------------------------------------------------------------------------
   1 Aristides v2.0 64 POPCNT   3101   0.0    0    0    16    9.0  56.2    2    0   14  12.5  87.5  3100 
   2 Stockfish 030817 64 POPC   3100   1.3    0    0    17    8.0  47.1    0    1   16   0.0  94.1  3100 
   3 SF-McBrain 2.7f 64 POPCN   3100   0.0    0    0    17    8.0  47.1    0    1   16   0.0  94.1  3100 
---------------------------------------------------------------------------------------------------------

not a lot games , but it is already clear these engines will be very competitive with each other and I would never be able to run enough games at this time control to say for sure which is engine is stronger - but one will be free to draw his own conclusions once both engines are released.

[shrapnel]

Download link ?

[zullil]

Download link ?

"in the next few weeks"

[Kurt Meyer]

Very good news!

Thanks!

[Norbert Raimund Leisner]

https://rapidu.net/3820857957/Aristides ... x32-x64.7z

[Kurt Meyer]

https://rapidu.net/3820857957/Aristides ... x32-x64.7z

Hi Norbert

Is this the same engine/version indicated by MikeB?

Would you mind upload it in a different site... rapidu.net just doesn't work.

Thanks in advance

[AdminX]

https://rapidu.net/3820857957/Aristides ... x32-x64.7z

Hi Norbert

Is this the same engine/version indicated by MikeB?

Would you mind upload it in a different site... rapidu.net just doesn't work.

Thanks in advance

It's version 1.1

[Kurt Meyer]

Ok!

Thank you Ted!

[MikeB]

600 game test run , single core , 64M hash., 5 min + 3sec inc, using Kai's opening book.

Code: Select all

200 rounds and 600 games completed...
time control: 30000+300
Date: 08/10/17 : 13:45:24
600 game(s) loaded
Rank Name                      Rating   Δ     +    -     #     Σ    Σ%     W    L    D   W%    =%   OppR 
---------------------------------------------------------------------------------------------------------
   1 Aristides v2.0 64 POPCNT   3111   0.0    8    8   400  210.5  52.6   43   22  335  10.8  83.8  3095 
   2 SF-McBrain 2.7f 64 POPCN   3096  14.7    8    8   400  196.0  49.0   26   34  340   6.5  85.0  3102 
   3 Stockfish 030817 64 POPC   3093   2.8    8    8   400  193.5  48.4   25   38  337   6.2  84.2  3103 
---------------------------------------------------------------------------------------------------------

I'm willing to call dev-SF-McB result an outlier above, but Cfish-Aristides result looks pretty convincing and 99%+ plus of the playing code is all Ronald. It just called something else so folks don't confuse it with the real Cfish. 10% faster than dev-SF on a Mac - great job by Ronald converting the code to C. Planning Labor Day Release and yes that means Thursday August 31st so if you're taking the Friday off before Labor Day, you get to play with it over the long 4 day weekend. Just want to take some time and if there's any code from SF-Zander that I can sneak in. Just 3 weeks away and as an FYI, the CF-Arisitide above had only Stockfish updates through about early May. More ELO is on the way. Ronald has been converting the SF code to C at a torrid pace - he is a pretty amazing programmer.

[Gusev]

Michael, note the +20 Elo jump in SF dev performance at https://nextchessmove.com/dev-builds today (August 26, 2017). You may want to incorporate the corresponding three changes into Aristides / SF-MB to prevent them from falling behind.