Nice position

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Jouni
Posts: 3227
Joined: Wed Mar 08, 2006 8:15 pm

Nice position

Post by Jouni »

[fen]1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - - 0 1[/fen]

Mate in about 40?
Jouni
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Paloma
Posts: 1163
Joined: Thu Dec 25, 2008 9:07 pm

Re: Nice position

Post by Paloma »

[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - - 0 1"]
[PlyCount "35"]

{EG#03952.} 1. Bc6 Rxb7 (1... Ra8 2. Bd7+ Kb8 3. Na5) 2. Bd7+ Kb8 3. Na6+ Ka8 4. Bc6 $1 Be7 5. Kf3 $1 Bd6 $1 6. Kg2 Be5 7. Kh3 Bf6 (7... Bg3 $1 8. Kxg3 h4+ 9. Kf4 h3 10. Kg3 h2 11. Nc5 a5 12. Nxb7 Ka7 13. Kxh2 {40#} (13. Nxa5 $2 {remis}) 13... a4 14. Nd8 {39#} a3 15. Bd5 Kb6 16. Ne6 c5 17. Ba2 Kb5 18. Nc7+ Kc6 19. Nd5 Kd6 20. Ne3 Ke5 21. Kg3 Kd4 22. Kf4 Kd3 23. Nc4 Kd4 24. Nxa3 {29#}) 8. Kg3 {15#} Bg5 9. Kf3 h4 10. Kg4 Bd8 $1 11. Kf4 $1 (11. Kf5 $2 h3 12. Ke6 h2 13. Kd7 h1=Q 14. Bxh1 c6+ 15. Kc8 Rb6) 11... Be7 12. Kf5 $1 h3 13. Ke6 h2 14. Kd7 $1 h1=Q 15. Bxh1 c6+ 16. Kc8 Rb8+ {<eg>} 17. Nxb8 a5 18. Nxc6 {1-0 Kasparyan=G-(+0342.03e2c8) 3.hm Szachy#1006 1977} *[/pgn]

After 7...Bf6 is 8.Kg3 mate in 15
7... Bg3 is much better, and after 8. Kxg3 h4+ 9. Kf4 h3 10. Kg3 h2 11. Nc5 a5 12. Nxb7 Ka7 is 13. Kxh2 mate in 40

To difficult for Engines :)
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peter
Posts: 3167
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Nice position

Post by peter »

Jouni wrote: ↑Mon Dec 12, 2022 10:51 pm [fen]1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - - 0 1[/fen]

Mate in about 40?
Something about that probably, yes.
It's a study by Kasparyan G. 1977, HHdbVI has it as nr. +0342.03e2c8 with comment
3.hm Szachy#100; as Paloma alread wrote as I saw not until I had posted on my own too.
Author's solution leads to mate in a much shorter way than longest one does, it's not a mate in x- puzzle, so thematic line counts more than DTM.
With first move given in, SlowChess started looking for mate, without that it had some ponder- time with 0.00 even with right first best move in output, Huntsman as well.
After a quick Backward of author's line:

1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - -

Engine: SlowChess Blitz 2.9 avx20 (32768 MB)
von Jonathan Kreuzer

52/99 1:39 +M50 1.Lc6 Txb7 2.Ld7+ Kb8 3.Sa6+ Ka8
4.Lc6 Le7 5.Kf3 Ld6 6.Kg2 Lf4 7.Kh3 Lg3
8.Kxg3 h4+ 9.Kh2 h3 10.Sc5 a5
11.Sxb7 Ka7 12.Sd8 Kb6 13.La4 Kc5
14.Sc6 (4.223.249.525) 42300

DTM of best line will be some shorter probably.

Edit of edit: Crystal started with empty hash:

1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - - 0 1

Analysis by Crystal 5 KWK:

Code: Select all

1.Bxh5 Rxb7 2.Nxb7 
  Black is slightly better: =/+ (-0.44)  Depth: 1/1   00:00:03  3488Nodes
1.Bxh5 Rxb7 2.Nxb7 
  Black is slightly better: =/+ (-0.44)  Depth: 2/2   00:00:03  80kN
1.Bc6 Rxb7 2.Bxb7+ Kb8 
  The position is equal: = (0.12)  Depth: 3/3   00:00:03  89kN
...
1.Bxh5 c6 2.Nd6+ Kc7 3.Ne8+ Kb6 4.Nd7+ Kb7 5.Nd6+ Kc7 6.Nxb8 Kxd6 7.Nxc6 Kxc6 8.Be8+ Kc5 9.Kf1 Kb6 10.Bh5 Be7 11.Bf7 Bd8 
  The position is equal: = (0.00)  Depth: 39/24   00:00:09  202MN
1.Bc6 
  The position is equal: = (0.04 ++)  Depth: 40/55   00:00:09  219MN
...
1.Bc6 
  White is slightly better: +/= (0.39 ++)  Depth: 40/55   00:00:15  379MN
...
1.Bc6 
  White has a decisive advantage: +- (3.28 ++)  Depth: 40/74   00:00:19  502MN
1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Bg3 7.Kxg3 h4+ 8.Kh2 h3 9.Nc5 a5 10.Bxb7+ Ka7 11.Bd5 Kb6 12.Na4+ Kb5 13.Bb3 Kb4 14.Bc2 Kc4 15.Kxh3 Kd4 16.Kg3 Ke3 17.Bg6 c5 18.Bf7 Ke4 19.Nxc5+ Kf5 20.Na4 Ke4 21.Kg4 Ke3 22.Bg6 Kf2 23.Kf4 Ke2 24.Bf5 Kf2 25.Bd3 Kg2 26.Ke3 Kh3 27.Bf5+ Kg3 28.Nc3 
  White is winning: +- (3.56)  Depth: 40/128   00:00:26  742MN
...
1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Bg3 7.Kxg3 h4+ 8.Kh2 h3 9.Nc5 a5 10.Bxb7+ Ka7 11.Bd5 Kb6 12.Na4+ Kb5 13.Bb3 Kb4 14.Bc2 Kc4 15.Kxh3 Kd4 16.Kg4 Ke3 17.Bg6 c5 18.Bf7 Kd4 19.Kf4 c4 20.Bg6 c3 21.Bc2 Kd5 22.Ke3 Ke5 23.Kd3 Kf5 24.Kxc3+ Ke5 25.Kc4 Ke6 26.Kc5 Ke5 27.Bd3 Kf4 28.Kd4 Kg3 29.Be4 Kf4 30.Bb1 Kg3 
  White is winning: +- (4.05)  Depth: 42/91   00:00:37  1247MN
1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Bg3 7.Kxg3 h4+ 8.Kh2 h3 9.Nc5 a5 10.Bxb7+ Ka7 11.Bd5 Kb6 12.Na4+ Kb5 13.Bb3 Kb4 14.Bc2 Kc4 15.Kxh3 Kd4 16.Kg4 Ke3 17.Bg6 c5 18.Bf7 Kd4 19.Kf4 c4 20.Bg6 c3 21.Bc2 Kd5 22.Ke3 Ke5 23.Kd3 Kf5 24.Kxc3+ Ke5 25.Kc4 Ke6 26.Kc5 Ke5 27.Bd3 Kf4 28.Kd4 Kg3 29.Be4 Kf4 30.Bb1 Kg3 
  White is clearly winning: +- (4.48 ++)  Depth: 43/94   00:01:00  2323MN
...
1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Bg3 7.Kxg3 h4+ 8.Kh2 h3 9.Nc5 a5 10.Bxb7+ Ka7 11.Bd5 Kb6 12.Na4+ Kb5 13.Bb3 Kb4 14.Bc2 Kc4 15.Kxh3 Kd4 16.Kg4 Ke3 17.Bg6 c5 18.Bf7 Kd4 19.Kf4 c4 20.Bg6 c3 21.Bc2 Kd5 22.Ke3 Ke5 23.Kd3 Kf5 24.Kxc3+ Ke5 25.Kc4 Ke6 26.Kc5 Ke5 27.Bd3 Kf4 28.Kd4 Kg3 29.Be4 Kf4 30.Bb1 Kg3 
...
1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Bg3 7.Kxg3 h4+ 8.Kh2 h3 9.Nc5 a6 10.Bxb7+ Ka7 11.Be4 Kb6 12.Na4+ Kb5 13.Bc2 Kc4 14.Kxh3 Kd4 15.Kg4 Ke5 16.Kf3 Kd4 17.Be4 c5 18.Kf4 c4 19.Bf5 Kd5 20.Bc2 Kd4 21.Be4 a5 22.Kf5 c3 23.Bb1 Kd5 24.Bc2 Kd4 25.Kf4 Kd5 26.Nxc3+ Kc4 27.Na4 Kb4 28.Ke5 Kb5 29.Kd4 Kb4 30.Nc5 Kb5 31.Nd3 Kc6 32.Ke5 Kb5 33.Kd5 a4 34.Bd1 a3 35.Nc1 Kb6 36.Na2 Kb7 37.Ba4 Ka6 38.Bb3 
  White mates: +- (#59)  Depth: 47/100   00:07:11  25657MN
Had 2 more trials with similar time to solution and time to winning eval, regards
Peter.
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Jouni
Posts: 3227
Joined: Wed Mar 08, 2006 8:15 pm

Re: Nice position

Post by Jouni »

Thanks Peter. When I tested position with Crystal it got soon winning score, but after 15 minutes it suddenly goes to 0,00 :o .
Jouni
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peter
Posts: 3167
Joined: Sat Feb 16, 2008 7:38 am
Full name: Peter Martan

Re: Nice position

Post by peter »

Jouni wrote: ↑Tue Dec 13, 2022 8:59 am Thanks Peter. When I tested position with Crystal it got soon winning score, but after 15 minutes it suddenly goes to 0,00 :o .
Oops
:)
Yet as you see at my output Crystal got a DTM- score (not even much too high probably), after that I stopped. Normally an already found mate doesn't change to 0.00 anymore.
One difference between your and my trials could be, I had Syzygy ProbeLimit=0, if you want to give that a try and didn't do so already too anyhow
:|
Peter.
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Vinvin
Posts: 5222
Joined: Thu Mar 09, 2006 9:40 am
Full name: Vincent Lejeune

Re: Nice position

Post by Vinvin »

peter wrote: ↑Mon Dec 12, 2022 11:50 pm 1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - -

Engine: SlowChess Blitz 2.9 avx20 (32768 MB)
von Jonathan Kreuzer

52/99 1:39 +M50 1.Lc6 Txb7 2.Ld7+ Kb8 3.Sa6+ Ka8
4.Lc6 Le7 5.Kf3 Ld6 6.Kg2 Lf4 7.Kh3 Lg3
8.Kxg3 h4+ 9.Kh2 h3 10.Sc5 a5
11.Sxb7 Ka7 12.Sd8 Kb6 13.La4 Kc5
14.Sc6 (4.223.249.525) 42300
With more time it finds a mate in 47 :

FEN: 1rkb4/pNp5/8/2N4p/8/5B2/4K3/8 w - - 0 1

Code: Select all

Slow64-avx2:
...
 57/110	01:35	 3.011.731k	31.540k	+M48	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Be6 Kb4 16.Kg3 c5 17.Kf4 c4 18.Ke3 c3 19.Kd3 c2 20.Kxc2 a4 21.Kb2 Kb5 22.Kc3 Kb6 23.Kd4 Kc6 24.Nc3 Kd6 25.Bc4 Ke7 26.Ke5 a3 27.Nb5 a2 28.Bxa2 Kd7 29.Bd5 Ke7 30.Na3 Kd7 31.Nc4 Ke7 32.Nb6 Kf8 33.Kf6 Ke8 34.Bb3 Kf8 35.Nd7+ Ke8 36.Ke6 Kd8 37.Kd6 Ke8 38.Bd5 Kd8 39.Bf7 Kc8 40.Nc5 Kd8 41.Ne6+ Kc8 42.Kc6 Kb8 43.Kb6 Kc8 44.Be8 Kb8 45.Bd7 Ka8 46.Nc7+ Kb8 47.Na6+ Ka8 48.Bc6+
 58/110	01:52	 3.509.448k	31.295k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Be6 Kb4 16.Kg3 c5 17.Kf4 c4 18.Ke3 c3 19.Kd3 c2 20.Kxc2 a4 21.Kd3 Ka3 22.Nc5 Kb4 23.Kd4 Ka3 24.Bd7 Kb2 25.Bxa4 Ka2 26.Kc3 Kb1 27.Bb3 Ka1 28.Bc2 Ka2 29.Nb3 Ka3 30.Bb1 Ka4 31.Nd4 Ka5 32.Be4 Ka4 33.Bd5 Ka3 34.Nc2+ Ka4 35.Bc6+ Ka5 36.Kc4 Kb6 37.Nd4 Kc7 38.Kc5 Kd8 39.Kd6 Kc8 40.Nb3 Kd8 41.Nc5 Kc8 42.Bd7+ Kb8 43.Kc6 Ka7 44.Kc7 Ka8 45.Kb6 Kb8 46.Na6+ Ka8 47.Bc6+
 59/110	02:19	 4.315.811k	30.938k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kb3 25.Ne5+ Kb4 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Kd8 36.Kd6 Ke8 37.Bd5 Kd8 38.Bc6 Kc8 39.Nf4 Kd8 40.Ne6+ Kc8 41.Kc5 Kb8 42.Kb6 Kc8 43.Bb5 Kb8 44.Bd7 Ka8 45.Nc7+ Kb8 46.Na6+ Ka8 47.Bc6+
 60/110	02:46	 5.107.454k	30.626k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kb3 25.Ne5+ Kb4 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Kd8 36.Kd6 Ke8 37.Bd5 Kd8 38.Bc6 Kc8 39.Nf4 Kd8 40.Ne6+ Kc8 41.Kc5 Kb8 42.Kb6 Kc8 43.Bb5 Kb8 44.Bd7 Ka8 45.Nc7+ Kb8 46.Na6+ Ka8 47.Bc6+
 61/110	03:48	 6.977.663k	30.539k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kc5 25.Ne5 Kd6 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Kd8 36.Kd6 Ke8 37.Bd5 Kd8 38.Bc6 Kc8 39.Nf4 Kd8 40.Ne6+ Kc8 41.Kc5 Kb8 42.Kb6 Kc8 43.Bb5 Kb8 44.Bd7 Ka8 45.Nc7+ Kb8 46.Na6+ Ka8 47.Bc6+
 62/110	04:28	 8.184.064k	30.453k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kc5 25.Ne5 Kd6 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Ke8 36.Kd6 Kd8 37.Bb5 Kc8 38.Ne5 Kb7 39.Bc6+ Kc8 40.Nd7 Kd8 41.Nc5 Kc8 42.Bd7+ Kb8 43.Kc6 Ka7 44.Kc7 Ka8 45.Kb6 Kb8 46.Na6+ Ka8 47.Bc6+
 63/110	08:05	 14.279.022k	29.435k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kc5 25.Ne5 Kd6 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Ke8 36.Kd6 Kd8 37.Bb5 Kc8 38.Ne5 Kb7 39.Bc6+ Kc8 40.Nd7 Kd8 41.Nc5 Kc8 42.Bd7+ Kb8 43.Kc6 Ka7 44.Kc7 Ka8 45.Kb6 Kb8 46.Na6+ Ka8 47.Bc6+
 64/110	08:57	 15.786.579k	29.387k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kc5 25.Ne5 Kd6 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Ke8 36.Kd6 Kd8 37.Bb5 Kc8 38.Ne5 Kb7 39.Bc6+ Kc8 40.Nd7 Kd8 41.Nc5 Kc8 42.Bd7+ Kb8 43.Kc6 Ka7 44.Kc7 Ka8 45.Kb6 Kb8 46.Na6+ Ka8 47.Bc6+
 65/110	14:22	 25.692.938k	29.796k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kc5 25.Ne5 Kd6 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Ke8 36.Kd6 Kd8 37.Bb5 Kc8 38.Ne5 Kb7 39.Bc6+ Kc8 40.Nd7 Kd8 41.Nc5 Kc8 42.Bd7+ Kb8 43.Kc6 Ka7 44.Kc7 Ka8 45.Kb6 Kb8 46.Na6+ Ka8 47.Bc6+
 66/110	14:52	 26.588.598k	29.786k	+M47	1.Bc6 Rxb7 2.Bd7+ Kb8 3.Na6+ Ka8 4.Bc6 Be7 5.Kf3 Bd6 6.Kg2 Be5 7.Kh3 Bg3 8.Kxg3 h4+ 9.Kh2 h3 10.Nc5 a5 11.Bxb7+ Ka7 12.Bd5 Kb6 13.Ne4 Kb5 14.Kxh3 c6 15.Bf7 Kb4 16.Kg3 Ka3 17.Kf3 Kb2 18.Ke2 Kc2 19.Ke3 a4 20.Nc5 Kc3 21.Nxa4+ Kb4 22.Nb6 Kc5 23.Nc4 Kb4 24.Kd3 Kc5 25.Ne5 Kd6 26.Ng6 Kc5 27.Kc3 Kb5 28.Bb3 Kc5 29.Bc4 Kb6 30.Kb4 c5+ 31.Ka4 Kc6 32.Ka5 Kd7 33.Kb5 Kd6 34.Kb6 Kd7 35.Kxc5 Ke8 36.Kd6 Kd8 37.Bb5 Kc8 38.Ne5 Kb7 39.Bc6+ Kc8 40.Nd7 Kd8 41.Nc5 Kc8 42.Bd7+ Kb8 43.Kc6 Ka7 44.Kc7 Ka8 45.Kb6 Kb8 46.Na6+ Ka8 47.Bc6+
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Ajedrecista
Posts: 1950
Joined: Wed Jul 13, 2011 9:04 pm
Location: Madrid, Spain.

Re: Nice position.

Post by Ajedrecista »

Hello:

Nice position indeed, which can be found at YACPDB:

https://yacpdb.org/#283526

It won the 4th Honorable Mention. The problem was also reprinted at EG magazine No. 60 (Vol. IV), April 1980, page 296, Problem No. 3952:

https://arves.org/arves/images/PDF/EG_PDF/eg60.pdf

I did not found the problem at Domination in 2,545 endgame studies by Kasparyan (38 of them composed or revised by the own Kasparyan, just searching his problems with the help of the index of composers).

Regards from Spain.

Ajedrecista.
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