Sting SF 4.8.4 correction

[supersharp77]

Like the Sting concept and the aggressiveness of the Sting engine but my tests show very little difference between Sting 1.0 to Sting SF PV and Sting 4.6 or Sting 4.7 with not much luck with Sting 4.4 or 4.5 at all...dunno..
reminds me a bit of the situation Deep Saros creator found himself in after a time.... it happens......

[lech]

I prepared a list of endgame positions. Many of them Sting is able to solve very easly. Some need a strong machine, and some (a few) Sting SF 4.8.4 can't still solve.
If you want to help me, each information about these or other endgame positions difficult for Sting, are welcome.

Code: Select all

8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - bm Ng2;
1n6/Pp1p1p1p/1P1P1P1P/4K3/2p5/p7/rpp1P3/qkb1R3 w - - bm axb8N;
4N3/B6p/n2p4/rk1P4/p6p/P3Pp1P/3N1P1b/5K2 w - - bm Ke1;
8/p7/qkpN1p2/8/1B1P4/PP3K2/5P2/8 w - - bm Ba5+; 
6k1/7R/6P1/7P/8/6r1/8/K7 w - - bm Ka2;
8/8/8/8/1kB1q3/8/1PRb4/1K6 b - - bm Qh1+;
4kr2/5p1K/3p1Q2/1p4P1/4P3/1PP5/7b/8 w - - bm Kh6;
6R1/8/2pB3k/2P4p/5p1q/5P2/4P1K1/8 w - - bm Bf8+;
8/5p2/8/8/p7/rpK4p/1p3ppr/bQ1N1bqk w - - bm Kb4(d4);
1N4K1/1pp1p3/7k/2r3pP/p2pp1P1/P6N/8/2B5 w - - bm Nc6;
4k1rr/1R1R3p/8/8/8/2K5/7P/8 w k - bm Rd2;
5K2/k4p1p/5p1p/1p3p2/bP6/1p6/1P5p/7B w - - bm Ke8(e7);
2b1rk2/5p2/p1P5/2p2P2/2p5/7B/P7/2KR4 w - - bm f6;
4r1k1/pp5p/2p1bR2/2P5/2B1n3/2B2K2/PP5P/8 w - - bm Rxe6;
8/1pN4r/5pkp/8/5K1p/2P4N/P3Bn2/8 w - - bm Bh5+;
k4r2/1pp5/3bP3/3N4/5p2/1P6/4R1P1/K7 w - - bm e7;
8/7p/5P1k/1p5P/5p2/2p1p3/P1P1P1P1/1K3Nb1 w - - bm Ng3;
n2Bqk2/5p1p/Q4KP1/p7/8/8/8/8 w - - bm Qc8;
5rk1/pp3p1p/7b/2pR4/8/2P4P/P1PNr1P1/2K4R b - - Rxd2;
1k6/p3pp2/rr6/N1R4B/1R6/pp6/7p/7K w - - bm Rbc4;
8/p2p4/8/3p4/1Q6/4K3/Pp6/qk6 w - - bm Qa4;
6q1/2N3p1/8/k7/8/1p1p4/1P1Pp1Q1/1n2K3 w - - bm Qc6;
8/6pp/1K6/N5P1/3N4/8/npn1P3/k7 w - - bm Nab3+;
5kN1/3p1q2/5P2/5PP1/2pK4/1p1R4/1P6/8 w - - bm Rxb3;
8/3P3k/n2K3p/2p3n1/1b4N1/2p1p1P1/8/3B4 w - - bm Nf6+;
2N5/p7/P7/8/1KPp1p1p/3p1Bpp/3P2rq/R5bk w - - bm Nb6;
3Q4/3p4/P2p4/N2b4/8/4P3/5p1p/5Kbk w - - bm Qa8;
3r2k1/p6p/b2r2p1/2qPQp2/2P2P2/8/6BP/R4R1K w - - bm Rxa6;
8/P7/4k3/8/5P2/4Bq2/5P2/5K2 b - - Kf5;
8/6kP/1p6/p7/Pr6/K2B4/8/8 b - - bm Rh4 (next Kg7->f6->e5);
3B4/1r2p3/r2p1p2/bkp1P1p1/1p1P1PPp/p1P4P/PPB1K3/8 w - - bm Ba4+;
7b/p1p1p3/P1PpPp2/2nP1kpr/5P1p/p3KBPP/P7/8 w - - bm Be4+;
8/3k1b1r/2p1p1p1/rpPpPpPp/p2P1P1P/P2K4/8/4B3 w - - bm Bb4;
8/8/2pk4/8/p1p3B1/PpP5/1P6/r1NK4 w - - bm Bf5;
3k4/2pq3p/pp5R/4P3/P6P/2PN4/1PN3K1/8 w - - bm Nd4 (Kf3 probably solves too);
8/8/4B3/6p1/7k/8/4pPKP/8 w - - bm Bg4;
r7/7k/5R2/p3p3/Pp1pPp2/1PpP1Pp1/K1P3P1/8 w - - bm Kb1;
8/8/7p/3KNN1k/2p4p/8/3P2p1/8 w - - bm Kc6;
2b1r3/r2ppN2/8/1p1p1k2/pP1P4/2P3R1/PP3PP1/2K5 w - - bm Nd6+;
Kn6/8/8/3R2PB/8/2p2NP1/1q6/2k5 w - - bm Rd1+;
8/8/R7/1b4k1/5p2/1B3r2/7P/7K w - - bm h4+;
1R6/pPk1r3/2p5/K7/8/2B1b3/8/8 w - - bm Ka6;
7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 w - - bm Kd1;
5k2/4bp2/2B3p1/1P4p1/3R4/3P2PP/2r2PK1/8 b - - bm Rxf2+;
N7/8/2KR2rp/6k1/3p3p/2p4P/4PP2/5N2 w - - bm f4+;
k7/2Q5/8/8/8/8/7K/6r1 b - - Rh1+;
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - bm Rxb3+;
7k/6rp/5BpN/1r4P1/8/8/8/K7 b - - bm Rf5;
8/5pKN/5Pp1/5kP1/8/Bb6/8/7q b - - bm Qxh7;
8/1q3pKN/5Pp1/5kP1/8/Bb6/8/8 b - - bm Qh1;
8/1p3pKN/5Pp1/5kP1/1B6/Pb6/8/7r b - -  bm Rxh7;
3N2r1/2K1p3/4Pk2/8/Bp5b/8/2P5/8 b - - bm Bg3+ (and next Kd7 Rxd8+);
7R/6pb/6k1/Pr4Pp/7P/6K1/8/8 b - - bm Kf7;
4n3/4k3/p4n2/Pp1p1p1p/QPpPpPpP/2P1P1P1/1R3BK1/7R w - - bm Qxb5;
3r1r1q/4p3/k2pPp2/b1pP1Pp1/1pP1B1Pp/pP5P/P3K3/8 b - - bm Qg8;
8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR w - - bm Kd1;
1k6/3p4/1B6/4Pp1p/1p5R/1p4p1/pP3n2/K6n w - - bm Rxh1;
q7/b1p5/kp1p4/p2PN3/PPP5/1K6/8/5B2 w - - bm c5+;
8/4K2p/6pr/5pk1/1pB2R2/p4PP1/8/8 w - - bm Rg4+;
1K3kB1/8/6p1/7R/8/4b3/8/6n1 w - - bm Rh8 (and next Kg7 Bh7); 
1k6/8/1B5p/1R6/6K1/8/8/7r w - - bm Bg1+;
4q1kr/p6p/1prQPppB/4n3/4P3/2P5/PP2B2P/R5K1 w - - bm Qxe5;
5q2/1p1kp3/pP4p1/4B3/3N3K/1B6/P4P2/8 w - - bm Be6+;
q1b4n/1p1pKp2/1p1p1Pp1/1P1P2Pp/2P4P/8/7R/1N1k4 w - - bm Ra2;
4bkrb/1K2p1r1/4P2B/8/8/8/8/7R w - - bm Ra1;
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4;
8/5kpp/2bp1p2/p7/2rP4/R1P2P2/P1N3PP/6K1 b - - bm a4;
3r4/p5kP/2B2b2/2pp3P/8/4K3/P7/5R2 w - - bm h6+;
1k1n4/1p1b1p2/1Bp1pPp1/1PP1P3/8/6P1/8/1K6 w - - bm Bc7+;
1k6/bPN2pp1/Pp2p3/p1p5/2pn4/3P4/PPR5/1K6 w - - bm Na8;
5B1q/3N3p/p3p2p/7k/B7/5PP1/K6P/8 w - - bm Ne5;
2r5/prkpR1p1/2p1ppK1/P1p1N1B1/P1P1P3/8/8/8 w - - bm Bf4;
8/1R2k1p1/4P2p/5P1P/2K5/8/8/6r1 b - - bm Ke8;
8/p6p/2k3p1/4Pp2/2K2P1P/6P1/8/8 w - - bm h5;
1b6/3kB3/8/1KpPp2p/4Pp1P/5P2/8/8 w - - bm Bf8;
8/5pk1/r5pp/P7/3R3P/6P1/5PK1/8 w - - bm (Rd5 or Ra4 or both ?);
8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - bm Be2+;
6K1/2r3Pp/k1P2p1p/8/p7/5P2/2PN4/8 w - - bm Kh8;
6k1/1pp2p2/3p4/p2P1Pp1/2P1n1Pp/4B1nP/PP4B1/4K3 w - - bn Bxe4;
4b3/1p2k3/p1p1p1p1/2P1P2p/1P3P1P/PK1B4/8/8 w - - bm Ka4;
8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - bm Bh3;
2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - bm c5;
1b3k2/2p2pp1/1pP1p2p/8/PP6/4P3/6NP/4K3 b - - bm b5;
8/1B6/3r2p1/5p1p/5P1P/4k1P1/8/6K1 b - - bm g5;
8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - bm g5;
8/3Pk1p1/1p2P1K1/1P1Bb3/7p/7P/6P1/8 w - - bm g4;
8/6p1/4B2p/8/6P1/p2k1K2/6P1/8 w - - bm g5;

[fishpov]

Hi Marek
your engine is really astonishing. It can find many combinations that other engines are not able to find.
Here in this link we discuss about your engine.
http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=29842

Perhaps it is not able yet to find this kind of fortress position.
2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - 0 1

I will give you other position later.

[zullil]

Hi Marek
your engine is really astonishing. It can find many combinations that other engines are not able to find.
Here in this link we discuss about your engine.
http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=29842

Perhaps it is not able yet to find this kind of fortress position.
[d]2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - 0 1

I will give you other position later.

[Paloma]

[d] 2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - 0 1
46.Qd2 Qa7 47.Kb3 Kb7 48.Nb2 Kb6 49.Ka4! Bh2 50.Nd3
[d] 8/q1p5/1k1p4/pPpPp1pp/K1P1Pp2/P2N1P1P/3Q2Pb/8 b -- 0 1

[lech]

Hi Marek
your engine is really astonishing. It can find many combinations that other engines are not able to find.
Here in this link we discuss about your engine.
http://rybkaforum.net/cgi-bin/rybkaforu ... ?tid=29842

Perhaps it is not able yet to find this kind of fortress position.
2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - 0 1

I will give you other position later.

Hi Nicolas,

I am happy that you want to help me. .
I lost many time to find some bug in the code of parent Stockfish 2.1.1 .
I don't know what it (correction) changes for such tough positions, but Sting now seems to be a bit stronger. I test it (ELO).
[d]4b3/4P1p1/8/2Bp1k2/p1pPp1p1/1pP1PpP1/1P3P1K/3N2RN w - - bm Rg2;
[d]2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - am Nxb6+;
[d]4n3/4k3/p4n2/Pp1p1p1p/QPpPpPpP/2P1P1P1/1R3BK1/7R w - - bm Qxb5;
[d]3r1r1q/4p3/k2pPp2/b1pP1Pp1/1pP1B1Pp/pP5P/P3K3/8 b - - bm Qg8;
[d]8/8/8/1k3p2/p1p1pPp1/PpPpP1Pp/1P1P3P/QNK2NRR w - - bm Kd1;
This correction will need a next version e.g. 4.8.5. I will try to add a new original idea to make search a bit faster too.

Maybe the above posiitions the nest version of Sting will solve, but they are not that important for me. They are a bit artifical maybe good for an A.I.

There is one other serious problem before my project and I must drink many beers to solve it..

best
Marek

[fishpov]

Hi Marek, I understand this is close position but what it is wonderfull in your engine is this possiblity to find as other engines are not able to do.

Here also any engine is not able to find white move to win.
q1N5/b1p5/1pP2k2/pP3Bp1/P1P5/6P1/1K3P2/8 w - - 0 8

Here below
r7/1b1r4/k1p1p1p1/1p1pPpPp/p1PP1P1P/PP1K4/8/4Q3 w - - 0 1
Deep Shredder 12 find this immediatly.

Now I will to find for you more trurhful problem.

Many thanks for your good jib !

[lech]

Hi Marek, I understand this is close position but what it is wonderfull in your engine is this possiblity to find as other engines are not able to do.

Here also any engine is not able to find white move to win.
[d]q1N5/b1p5/1pP2k2/pP3Bp1/P1P5/6P1/1K3P2/8 w - - 0 8

Here below
[d]r7/1b1r4/k1p1p1p1/1p1pPpPp/p1PP1P1P/PP1K4/8/4Q3 w - - 0 1
Deep Shredder 12 find this immediatly.

Now I will to find for you more trurhful problem.

Many thanks for your good jib !

Thanks Nicolas, the bug in Stockfish 2.1.1 was very serious for my project and now Sting seems to work much more stable. Wait for the next version of Sting, and me for your tough positions.

[lech]

Here also any engine is not able to find white move to win.
[d]q1N5/b1p5/1pP2k2/pP3Bp1/P1P5/6P1/1K3P2/8 w - - 0 8

I can't find the win here too. Let me watch the solution.

[Paloma]

[pgn]
[Event "?"]
[Site "?"]
[Date "2010.10.27"]
[Round "?"]
[White "Kornrade"]
[Black "Can Rybka solve this? part IV"]
[Result "1-0"]
[Annotator "?"]
[SetUp "1"]
[FEN "q1N5/b1p5/1pP2k2/pP3Bp1/P1P5/6P1/1K3P2/8 w - - 0 8"]

8. Bd7 (8. Bg4 Ke5 9. Kc3 Qb8 10. Kd3 Qa8 11. f3) 8... Ke5 9. f3 Kf6
10. Kc3 Kg6 11. Kd4 Kf6 12. f4 gxf4 13. gxf4 Qb8 14. f5 Qa8 15. Ke4 Qb8
16. Kf4 Qa8 17. Kg4 $1 Qb8 18. Kh5 Qa8 19. Kh6 Qb8 20. Kh7 Qa8 21. Kg8 Qb8
22. Kf8 Qa8 23. Ke8 Bb8 24. Kd8 Ba7 25. Be6 Bb8 26. Kd7 Ba7 27. Kxc7 Bb8+
28. Kxb6 Bh2 29. c7 Qf3 30. Nd6 Bxd6 31. c8=Q Bb4 32. Qd8+
Ke5 33. c5 Qe3 1-0
[/pgn]