No 19331 | Akobia | First price | EG October 2013 Supplement, Page 383
[d]5N2/N1p2r2/5P2/Kp6/p7/8/2k1P3/2B5 w - - 0 0
http://www.viewchess.com/cbreader/2017/ ... 23453.html
Difficult studies
Moderators: hgm, Rebel, chrisw
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- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
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Re: Difficult studies
No 19384 | V. Kirillov & E. Kudelich | Honourable mention | EG October 2013 Supplement, page 398
Possible cook
Winning 8-man EGTB position.
[d]1K6/8/2P3P1/1R6/8/5n2/4rrPk/6b1 w - - 0 0
http://www.viewchess.com/cbreader/2017/ ... 43843.html
Possible cook
Winning 8-man EGTB position.
[d]1K6/8/2P3P1/1R6/8/5n2/4rrPk/6b1 w - - 0 0
http://www.viewchess.com/cbreader/2017/ ... 43843.html
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- Posts: 3186
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- Full name: Peter Martan
Re: Difficult studies
Hi Jon!
Thanks for starting a new thread, the old one was getting a little confusing.
After some Forward-Backward, I get this output with full Syzygys:
5N2/N1p2r2/5P2/Kp6/p7/8/2k1P3/2B5 w - - 0 1
Analysis by Stockfish MateFinder 64:
1.Ba3 Kb3 2.Nxb5 c6 3.e4 Rxf6 4.Nd7 Rg6 5.Nc5+ Ka2 6.Nd6 Kxa3 7.Nc4+ Ka2 8.Kxa4 Kb1 9.Kb3 Rg3+ 10.Kb4 Kc2 11.Nd6 Rg5 12.Kc4 Re5 13.Kd4 Rd5+ 14.exd5
= (0.00) Depth: 39/28 00:00:59 788MN, tb=39949243
At 8.Kxa4 it's a drawn 7some Position.
After your SF- line in cb- reader with 2.Bc5 instead of Nxb5:
5N2/N1p2r2/5P2/KpB5/p7/1k6/4P3/8 b - - 0 1
Analysis by Stockfish MateFinder 64:
2...Kc4 3.Ne6 Rxf6 4.Nxb5 Rxe6 5.Nxc7 Rxe2
= (0.00) Depth: 39/31 00:00:35 631MN, tb=38169984
Yet it might be won after the last move of your line with ...2...b4 (?)
So yet cooked
Thanks for starting a new thread, the old one was getting a little confusing.
Nordlandia wrote:No 19331 | Akobia | First price | EG October 2013 Supplement, Page 383
[d]5N2/N1p2r2/5P2/Kp6/p7/8/2k1P3/2B5 w - - 0 0
http://www.viewchess.com/cbreader/2017/ ... 23453.html
After some Forward-Backward, I get this output with full Syzygys:
5N2/N1p2r2/5P2/Kp6/p7/8/2k1P3/2B5 w - - 0 1
Analysis by Stockfish MateFinder 64:
1.Ba3 Kb3 2.Nxb5 c6 3.e4 Rxf6 4.Nd7 Rg6 5.Nc5+ Ka2 6.Nd6 Kxa3 7.Nc4+ Ka2 8.Kxa4 Kb1 9.Kb3 Rg3+ 10.Kb4 Kc2 11.Nd6 Rg5 12.Kc4 Re5 13.Kd4 Rd5+ 14.exd5
= (0.00) Depth: 39/28 00:00:59 788MN, tb=39949243
At 8.Kxa4 it's a drawn 7some Position.
After your SF- line in cb- reader with 2.Bc5 instead of Nxb5:
5N2/N1p2r2/5P2/KpB5/p7/1k6/4P3/8 b - - 0 1
Analysis by Stockfish MateFinder 64:
2...Kc4 3.Ne6 Rxf6 4.Nxb5 Rxe6 5.Nxc7 Rxe2
= (0.00) Depth: 39/31 00:00:35 631MN, tb=38169984
Yet it might be won after the last move of your line with ...2...b4 (?)
So yet cooked
Peter.
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- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Difficult studies
Cook detected
Bishop promotion
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "k3r3/3N2pP/2K4P/pP1R4/8/7r/B6p/4b3 w - - 0 1"]
[PlyCount "12"]
1. Nb6+ Kb8 2. Nd7+ Ka7 3. b6+ Ka8 4. hxg7 Rxh7 5. Rxa5+ Bxa5 6. Bd5 h1=B $19 *
[/pgn]
Bishop promotion
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "k3r3/3N2pP/2K4P/pP1R4/8/7r/B6p/4b3 w - - 0 1"]
[PlyCount "12"]
1. Nb6+ Kb8 2. Nd7+ Ka7 3. b6+ Ka8 4. hxg7 Rxh7 5. Rxa5+ Bxa5 6. Bd5 h1=B $19 *
[/pgn]
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- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Difficult studies
Check if your engine of choise can solve this one
No 17948 | J. Timman
[d]1R6/2B2r1k/p4p2/pP6/3b2p1/1P5p/1P3P1P/4K3 w - - 0 0
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1R6/2B2r1k/p4p2/pP6/3b2p1/1P5p/1P3P1P/4K3 w - - 0 0"]
[PlyCount "9"]
1. b6 Be5 2. Bxe5 Re7 3. f4 gxf3 4. Rb7 Rxb7 5. Bc7 $18 *
[/pgn]
No 17948 | J. Timman
[d]1R6/2B2r1k/p4p2/pP6/3b2p1/1P5p/1P3P1P/4K3 w - - 0 0
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "1R6/2B2r1k/p4p2/pP6/3b2p1/1P5p/1P3P1P/4K3 w - - 0 0"]
[PlyCount "9"]
1. b6 Be5 2. Bxe5 Re7 3. f4 gxf3 4. Rb7 Rxb7 5. Bc7 $18 *
[/pgn]
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- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Difficult studies
Possible cook detected
Winning 8-man EGTB position.
No 17963 | A. Manvelyan | 6th price
4n3/PRP1Pk2/8/Kbn5/4q3/7B/8/8 w - - 0 0
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4n3/PRP1Pk2/8/Kbn5/4q3/7B/8/8 w - - 0 0"]
[PlyCount "10"]
{[#]} 1. a8=Q Nxb7+ 2. Qxb7 Qxb7 3. c8=Q Qa7+ 4. Kb4 Qa4+ 5. Kc5 Nf6 *
[/pgn]
Winning 8-man EGTB position.
No 17963 | A. Manvelyan | 6th price
4n3/PRP1Pk2/8/Kbn5/4q3/7B/8/8 w - - 0 0
[pgn][Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "4n3/PRP1Pk2/8/Kbn5/4q3/7B/8/8 w - - 0 0"]
[PlyCount "10"]
{[#]} 1. a8=Q Nxb7+ 2. Qxb7 Qxb7 3. c8=Q Qa7+ 4. Kb4 Qa4+ 5. Kc5 Nf6 *
[/pgn]
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- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Difficult studies
Possible cook
Akobia & R. Becker | EG July 2012, page 225
[d]4rk1K/8/5p2/p7/2p3N1/P5R1/2P5/3b4 w - - 0 0
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M. Kovacevic | First price | White wins
However, Stockfish is stuck on 0.00 evaluation after 1.b7 ...Bd6
[d]5b2/2Np4/p7/1P6/8/P4P2/2nk4/B4K2 w - - 0 0
Akobia & R. Becker | EG July 2012, page 225
[d]4rk1K/8/5p2/p7/2p3N1/P5R1/2P5/3b4 w - - 0 0
----------
M. Kovacevic | First price | White wins
However, Stockfish is stuck on 0.00 evaluation after 1.b7 ...Bd6
[d]5b2/2Np4/p7/1P6/8/P4P2/2nk4/B4K2 w - - 0 0
-
- Posts: 2821
- Joined: Fri Sep 25, 2015 9:38 pm
- Location: Sortland, Norway
Re: Difficult studies
Check if your engine can solve this one
[d]8/bp4Pk/3K1B2/R6p/2pNp1P1/p7/3p1Pn1/2r4q w - - 0 0
image uploader
[d]8/bp4Pk/3K1B2/R6p/2pNp1P1/p7/3p1Pn1/2r4q w - - 0 0
image uploader
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- Posts: 1167
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- Full name: Herbert L
Re: Difficult studies
deleted
Last edited by Paloma on Mon Mar 06, 2017 2:57 pm, edited 1 time in total.
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- Posts: 1167
- Joined: Thu Dec 25, 2008 9:07 pm
- Full name: Herbert L
Re: Difficult studies
3...gxf3 is wrong.
After 3...g3! no wining score evaluated.
[pgn]
[Event "?"]
[Site "?"]
[Date "2017.03.05"]
[Round "?"]
[White "Difficult studies"]
[Black "?"]
[Result "?"]
[Annotator "?"]
[SetUp "1"]
[FEN "1R6/2B2r1k/p4p2/pP6/3b2p1/1P5p/1P3P1P/4K3 w - - 0 1"]
[PlyCount "19"]
1. b6 $1 Be5 $1 2. Bxe5 Re7 $1 3. f4 gxf3
$4 (3... g3 $1 4. b7 gxh2 5. Rh8+ Kxh8 6. b8=Q+ Kg7 7. Qa8 fxe5 8. Qe4 Kg8 9. Qd5+ Kf8 10. Kf2 Rd7 11. Qa8+ Kf7 12. Kg3 Rd2 13. Kxh3 exf4 14. Qe4 Rf2 15. Kg4 f3 16. Qd5+ Kg7 17. Qe5+ Kf7 18. Qf5+ Ke7 19. Qc5+ Ke6 20. Qb6+ {+1.79})
[/pgn]
After 3...g3! no wining score evaluated.
[pgn]
[Event "?"]
[Site "?"]
[Date "2017.03.05"]
[Round "?"]
[White "Difficult studies"]
[Black "?"]
[Result "?"]
[Annotator "?"]
[SetUp "1"]
[FEN "1R6/2B2r1k/p4p2/pP6/3b2p1/1P5p/1P3P1P/4K3 w - - 0 1"]
[PlyCount "19"]
1. b6 $1 Be5 $1 2. Bxe5 Re7 $1 3. f4 gxf3
$4 (3... g3 $1 4. b7 gxh2 5. Rh8+ Kxh8 6. b8=Q+ Kg7 7. Qa8 fxe5 8. Qe4 Kg8 9. Qd5+ Kf8 10. Kf2 Rd7 11. Qa8+ Kf7 12. Kg3 Rd2 13. Kxh3 exf4 14. Qe4 Rf2 15. Kg4 f3 16. Qd5+ Kg7 17. Qe5+ Kf7 18. Qf5+ Ke7 19. Qc5+ Ke6 20. Qb6+ {+1.79})
[/pgn]