Chiron 3 released

[Christian Goralski]

Dear Customer,
I'm glad to inform you that a new version of Chiron has been released.

Chiron 3 is about 60 points stronger than Chiron 2.

Now also available on Android:
https://play.google.com/store/apps/deta ... ss.chiron3

Here's a short list of changes:
- improved search (better parameters for pruning and move ordering)
- improved evaluation (in particular mobility and king safety)
- tuning of the evaluation
- new parallel search
- added support for Syzygybases
- added option "Tablebases Probe Depth" (default=6, lower it if you have a SSD)
- 6 pieces Scorpio bitbases can now be probed
- improved time management
- fixed a time management bug for X moves in Y minutes time controls (thanks to Gabor Szots)
- added option "Blockage Detection" to enable/disable pawn blockage detection
- added again support for CTG books

Before installing and using Chiron, you should first read the License Agreement contained in the file "License.txt".

Arturo Ochoa has improved his Polyglot opening book and kindly offered it to Chiron 3 customers.

If you have any problem with the installation or usage of Chiron write an email to support@chironchess.com

Best Regards,
Ubaldo Andrea Farina

[Steve Maughan]

I've played a few games with Chiron 3. It's a really nice, and I think underrated, engine. It's got a brilliant tactical search. Here's a nice win against Fritz 15 at 5 mins per game. Notice the superb piece play and coordination. I particularly liked the 12. Nf1 maneuver.

[pgn][Event "Dell XPS, Blitz 5m"]
[Site "Longwood FL"]
[Date "2016.05.01"]
[Round "6"]
[White "Chiron 3 64bit"]
[Black "Fritz 15"]
[Result "1-0"]
[ECO "C51"]
[Annotator "0.47;-0.58"]
[PlyCount "101"]
[TimeControl "300"]

{Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz 2592 MHz W=22.7 plies; 4,971kN/s
B=17.0 plies; 2,490kN/s} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 {-0.58/16 4}
5. c3 {0.01/0 0} Bd6 {-0.33/17 8} 6. d4 {0.01/0 0} Qe7 {-0.25/17 9} 7. O-O {
0.01/0 0} Nf6 {-0.08/17 8} 8. Re1 {0.01/0 0 (Nbd2)} a6 {0.00/17 19} 9. a4 {
0.47/20 17} O-O {0.26/17 28} 10. Nbd2 {0.61/20 6} h6 {0.32/15 5 (Na5)} 11. Bd3
{0.66/19 6} Na5 {0.32/18 7 (b6)} 12. Nf1 {0.92/20 5 (Nc4)} Re8 {0.49/17 12} 13.
Ne3 {0.94/21 5} b6 {0.44/17 3 (Qd8)} 14. Nf5 {1.07/21 15} Qf8 {0.70/18 20 (Qd8)
} 15. Nxd6 {1.32/20 5} Qxd6 {0.75/19 2} 16. dxe5 {1.16/21 5} Rxe5 {0.76/19 1}
17. Nxe5 {1.24/24 6 (Bf4)} Qxe5 {0.72/17 1} 18. Be3 {1.32/24 5} Qe6 {0.83/18 6
(Bb7)} 19. Bd4 {1.40/20 5} Bb7 {0.84/17 6 (Nc6)} 20. Bb1 {1.36/21 6 (Qe2)} Nh7
{0.91/17 7 (Qe7)} 21. Ba2 {1.70/23 5} Qe7 {0.89/16 2} 22. Qg4 {1.86/23 4} Ng5 {
0.89/16 1} 23. Be3 {1.87/22 4 (Rad1)} Re8 {1.24/14 3 (Nc6)} 24. h4 {2.01/21 4}
Ne6 {1.54/17 5} 25. Bxh6 {1.86/20 5} Qf6 {1.56/17 3} 26. Bd2 {1.94/19 4} Nc6 {
1.67/17 4 (Nc5)} 27. f4 {2.35/21 4 (Bd5)} Qh6 {2.03/16 14 (Nf8)} 28. Rad1 {
2.65/21 5 (Be3)} Qh7 {2.07/17 2 (Nf8)} 29. Be3 {2.84/20 4 (Bb1)} Bc8 {2.05/17
4 (Nf8)} 30. Bb1 {2.97/20 4} g6 {2.16/17 4 (Nf8)} 31. e5 {2.89/21 4} Ng7 {
2.09/17 4} 32. Qg5 {2.97/20 3 (Qg3)} Ne7 {2.30/17 12 (Ne6)} 33. g4 {3.42/21 3
(Bf2)} Ne6 {2.71/15 5} 34. Qf6 {3.62/22 3} Bb7 {2.92/16 5} 35. f5 {3.64/22 3}
Nxf5 {2.99/16 2} 36. Bxf5 {3.69/22 3} gxf5 {2.99/16 1} 37. gxf5 {3.87/23 2} Ng7
{3.14/17 3 (Qg7+)} 38. Rxd7 {3.95/23 3} Nxf5 {3.28/17 5 (Qh5)} 39. e6 {4.76/22
3 (Qg5+)} Qg6+ {2.91/15 0} 40. Qxg6+ {5.01/24 3 (Bg5)} fxg6 {3.03/16 0} 41. Bg5
{4.98/27 3} Bc6 {3.15/17 3} 42. Rxc7 {5.45/23 4} Bxa4 {3.15/17 1} 43. e7 {
5.57/25 3 (Rb7)} Ng7 {3.75/16 3} 44. Rb7 {5.92/24 3} b5 {4.31/17 2} 45. Ra7 {
6.18/25 3} Bc2 {4.46/18 1 (Bb3)} 46. Rxa6 {6.45/26 3} Bd3 {4.62/18 1 (Kf7)} 47.
Rd1 {8.22/26 2 (Re5)} Bc4 {4.91/15 1} 48. Rxg6 {8.71/25 2 (Rd8)} Bf7 {6.91/17 2
} 49. Rb6 {9.45/24 2} Ne6 {7.43/18 3} 50. Rd8 {10.25/26 2} Ng7 {7.71/18 1} 51.
Rxb5 {11.93/26 2 (Kf2)} 1-0[/pgn]

[Sylwy]

http://talkchess.com/forum/viewtopic.ph ... 90&t=50060

[Amateur]

In Playchess server is playing a version called Chiron 3_160517 64bit, is an update?

[Nordlandia]

I tend to adjust contempt in negative number so it encourages Chiron to draw.

[uaf]

In Playchess server is playing a version called Chiron 3_160517 64bit, is an update?

It was Chiron 3.01 I released yesterday. Only a bugfix for Syzygy Bases.

[Amateur]

In Playchess server is playing a version called Chiron 3_160517 64bit, is an update?

It was Chiron 3.01 I released yesterday. Only a bugfix for Syzygy Bases.

thanks for information, this engine seemed interesting and I believe that soon I will be an your customer.

[Steve Maughan]

Hi Eric,

I can vouch that it is indeed an interesting engine. It has great tactical ability,

Steve

[Amateur]

Hi Eric,

I can vouch that it is indeed an interesting engine. It has great tactical ability,

Steve

thank you Steve, and from what I read is an original engine, which is no small thing in these times where the clones or derivatives springing up like mushrooms after a rainstorm!

Eric

[Mithu]

Chiron 4 is about 70 points stronger than Chiron 3.

Here’s a list of the main changes:
– improved automatic tuning of the evaluation
– improved evaluation of passed pawns, mobility, opposite bishops endings
– improved forward pruning in the search
– improved LazySMP for parallel search
– support for Windows Processor Groups (more than 64 threads can now be used)
– NUMA optimization (new UCI and Winboard options “NUMA”, true by default)
– minor speed optimizations
– fixed a pondering bug
– fixed two time management bugs under the Winboard protocol

Chiron 4 is available for Windows and Android.
Buyers of the Windows version will also receive a code to get the Android one for free.

Chiron 2/3 Customers can buy Chiron 4 with a discount through the link they have reiceved. Whoever has bought Chiron 3 in the last month will receive Chiron 4 for free.

http://www.chironchess.com/news/