Sting SF 21

Discussion of anything and everything relating to chess playing software and machines.

Moderators: bob, hgm, Harvey Williamson

Forum rules
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
lech
Posts: 1077
Joined: Sun Feb 14, 2010 9:02 pm

Re: Sting SF 21

Post by lech » Tue May 12, 2020 8:13 am

Gregory Owett wrote:
Mon May 11, 2020 2:06 pm
A pity, that Sting SF 21 loses its games on time ! :(
I found here: https://chessengines.blogspot.com/2020/ ... e-uci.html
a rating of Sting SF 21. Where is a problem?
Maybe, I can't be friendly, but let me be useful.

fishpov
Posts: 48
Joined: Sat Mar 07, 2015 5:05 pm

Re: Sting SF 21

Post by fishpov » Thu May 14, 2020 5:00 pm

Fortress problem


1.Nd6+ !

Analysis by Sting 21 (based on Stockfish 2.1.1) 64bit:

...
1.Rf3+ Ke6 2.g4 Rg8 3.Nh6 Rg6 4.Re3+ Kf6 5.f4 Rg7 6.g5+ Kg6 7.Re5 d6 8.Rxd5 Rb7 9.Kd2 Be6 10.Nf5 Bxd5 11.Nxg7 Kxg7 12.f5 Bxa2 13.f6+ exf6 14.gxf6+
-+ (-4.12 --) Profondeur: 24 00:00:23 64635kN
1.Nh6+ Kf6 2.Ng4+ Ke6 3.Ne3 d6 4.Kd2 Rh8 5.f4 Ra8 6.Rf3 Bb7 7.Rf2 a3 8.f5+ Kf7 9.b3 Rag8 10.g4 Rh1 11.Ke2 e6 12.fxe6+ Kxe6 13.Kd3
-+ (-4.16) Profondeur: 24 00:00:29 86298kN
1.Nh6+ Kf6 2.Ng4+ Ke6 3.Ne5 d6 4.Nd3 Kd7 5.Rg7 a3 6.b3 Rc7 7.Kd2 Bb7 8.Rh7 Rec8 9.Rh3 Rg8 10.Nf4 e5 11.dxe5 dxe5 12.Nd3 Rxg2 13.Nc5+ Rxc5 14.Rh7+ Kc6 15.Rh6+ Kc7 16.Rh7+ Kc8
-+ (-4.16) Profondeur: 25 00:00:35 108mN
1.Nh6+ Kf6 2.Ng8+ Ke6 3.Nxe7 Rxe7 4.Rg8 Rc7 5.Kd2 d6 6.f3 Kf6 7.Rh8 Rh7 8.Rf8+ Kg5 9.Rg8+ Kf4 10.b3 axb3 11.axb3 Be6 12.Rf8+ Rhf7 13.Re8 Rfe7 14.Rxe7 Rxe7 15.Ke2 Bf5+ 16.Kd2
-+ (-4.16) Profondeur: 26 00:00:53 178mN
1.Nd6+ exd6 2.Rf3+ Ke6 3.Re3+ Kf7 4.Rf3+ Ke7 5.Re3+ Kd8 6.Kd2 Rg8 7.g3 Bb7 8.f4 Ra8 9.a3 Kc7 10.Ke2 Rg7 11.Kf3 Rag8 12.Kg2 Rg6 13.Rf3 Re6 14.Rf2 Re3 15.Rf3 Re2+ 16.Rf2 Re6 17.f5 Rf6 18.Rf4 Rh6
-+ (-4.16) Profondeur: 27 00:01:24 300mN
...
1.Nd6+ exd6 2.Rf3+ Ke6 3.Re3+ Kf7 4.Rf3+ Ke7 5.Re3+ Kd8 6.Rxe8+ Kxe8 7.a3 Ke7 8.Kd2 Kf7 9.Ke3 Bb7 10.f3 Ra8 11.Kf2 Kf6 12.g3 Kf5 13.Kg2 Rh8 14.Kg1 Ke6 15.Kg2 Rg8 16.Kf2 Rf8 17.Kg2 Rh8 18.Kg1 Kf5 19.Kg2 Re8 20.Kf1 Rg8 21.Kf2 Kf6 22.Kg2 Kf7 23.Kf2 Rh8 24.Kg2 Kf6 25.Kg1 Kg6 26.Kg2 Kg5 27.Kg1 Rh7 28.Kg2 Kf5
-+ (-4.16) Depth: 44 02:01:27 28558MN


I think Sting 21 is the only one engine able to find this move !!
1.Nd6+ ! found in 1mn 24s

I tried with Bluefish XI-r1 FD (tactical=2 defensive=0)
But after 4 hours only Rf3+ move

Great Job for Marek !

lech
Posts: 1077
Joined: Sun Feb 14, 2010 9:02 pm

Re: Sting SF 21

Post by lech » Tue May 19, 2020 10:01 am

Indeed this example proves that an Alpha-Beta engine is able, without any tricks, to make that impossible.
A pity that my project (brain) is killing by an advanced technology. :(
Maybe, I can't be friendly, but let me be useful.

fishpov
Posts: 48
Joined: Sat Mar 07, 2015 5:05 pm

Re: Sting SF 21

Post by fishpov » Tue May 19, 2020 11:21 pm

What do you mean by advanced technology ?
About engine like leela ?

lech
Posts: 1077
Joined: Sun Feb 14, 2010 9:02 pm

Re: Sting SF 21

Post by lech » Wed May 20, 2020 3:59 pm

fishpov wrote:
Tue May 19, 2020 11:21 pm
What do you mean by advanced technology ?
About engine like leela ?
Sorry, but I am far to joke. :?
Maybe, I can't be friendly, but let me be useful.

fishpov
Posts: 48
Joined: Sat Mar 07, 2015 5:05 pm

Re: Sting SF 21

Post by fishpov » Fri May 22, 2020 10:25 pm

I sincerely hope that you will not abandon the sting project. For many positions, sting is the king. I don't yet see any other engine understanding the meaning of the finals as well.
For example :
Nd4 !
1.Nd4 Qg7+ 2.Kh3 Qxh6 3.Nf4 Kc8 4.Nde6 c6 5.h5 Kd7 6.Kg4 Ke8 7.Kf3 Ke7 8.Ke4 Kd7 9.Kf5 Ke8

Post Reply