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Difficult position for Stockfish
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Jon Fredrik Åsvang



Joined: 25 Sep 2015
Posts: 1220
Location: Sortland, Norway

PostPost subject: Re: Difficult position for Stockfish    Posted: Fri Feb 17, 2017 2:26 pm Reply to topic Reply with quote

Here is another difficult position for Stockfish Arrow

Gady Costeff, 6th place 7th WCCT 2001-2004, white wins!

[d]k1q5/2P3PP/p5p1/P5p1/PP4P1/1QK1n3/3p4/r3r2N w - - 0 0
BK :: BQ ::    ::    ::
::    WP    ::    WP WP
BP ::    ::    :: BP ::
WP    ::    ::    BP    
WP WP    ::    :: WP ::
:: WQ WK    BN    ::    
   ::    BP    ::    ::
BR    ::    BR    :: WN


Analysis:

Code:
[Event "6th Place, WCCT7 {m}"]
[Site "?"]
[Date "2004.??.??"]
[Round "?"]
[White "Costeff, Gady"]
[Black "White wins"]
[Result "*"]
[SetUp "1"]
[FEN "k1q5/2P3PP/p5p1/P5p1/PP4P1/1QK1n3/3p4/r3r2N w - - 0 1"]
[PlyCount "39"]
[EventDate "2004.??.??"]

1. g8=Q (1. g8=R Rac1+ 2. Kxd2 Nc4+ 3. Qxc4 Rcd1+ 4. Kc3 Rc1+ 5. Kb3 Rb1+ 6.
Ka3 Ra1+ 7. Qa2 Rxa2+ 8. Kxa2 Re8 9. h8=Q Qe6+) (1. h8=Q Rac1+ 2. Kxd2 Nc4+ 3.
Qxc4 Rcd1+ 4. Kc3 Rc1+ 5. Kb3 (5. Kd4 Rxc4+ 6. Kxc4 Re8) 5... Rb1+ 6. Ka3 Ra1+
7. Qa2 Rxa2+ 8. Kxa2 Re8 9. g8=Q Rxg8 10. Qf6 (10. Qe5 Qb7 11. Qxg5 Qxc7 12.
Qd5+ Ka7 13. Qxg8 Qc2+ 14. Ka3 Qc3+ 15. Qb3 Qa1+ 16. Qa2 Qc3+) 10... Qxc7 11.
Qxa6+ Kb8 12. Kb3 Rf8) 1... Ka7 (1... Rac1+ 2. Kxd2 Nc4+ 3. Qgxc4 Red1+ 4. Qxd1
Rxc4 5. Qf3+ Ka7 6. Qe3+) 2. Qxc8 (2. h8=Q d1=Q 3. Qd4+ Qxd4+ 4. Kxd4 Qxg4+)
2... Rac1+ 3. Kxd2 (3. Kd4 d1=Q+ 4. Qxd1 Rcxd1+ 5. Kc3 Rc1+ 6. Kd4 Rcd1+) 3...
Nc4+ 4. Kd3 (4. Qxc4 Rcd1+ 5. Kc3 Re3+ 6. Kc2 Re2+ 7. Qxe2 Rd2+ 8. Kc3 Rd3+ 9.
Kc4 Rd4+ 10. Kc5 Rd5+ 11. Kc6 Rd6+ 12. Kxd6) 4... Ne5+ 5. Kd4 Nc6+ 6. Kd5 Ne7+
7. Kd6 Nxc8+ 8. Kd5 (8. Kd7 Re7+ 9. Kd8 Rcxc7) 8... Rcd1+ (8... Ne7+ 9. Kd4
Nc6+ (9... Rxh1 10. b5 Rxh7 11. Qe3 Rxc7 12. b6+) 10. Kd3 Ne5+ 11. Kd2 Nc4+ 12.
Qxc4 Rcd1+ 13. Kc3 Rc1+ 14. Kb3 (14. Kd4 Rxc4+ {<or>} 15. Kxc4 Rxh1) 14... Rb1+
15. Ka3 Ra1+ 16. Qa2 Rxa2+ 17. Kxa2 Rxh1 (17... Re8 18. b5 Kb7 19. b6 Rh8 20.
Ng3 Rxh7 21. Ne4) 18. c8=R $1 (18. c8=Q Ra1+ 19. Kxa1)) 9. Kc5 Rc1+ (9... Rd7
10. h8=Q Rc1+ 11. Qhc3 Rxc3+ 12. Qxc3 Rxc7+ 13. Kd4 Rxc3 14. Kxc3) 10. Kd4
Rcd1+ 11. Kc3 Re3+ 12. Kc2 Rxb3 (12... Rc3+) 13. h8=Q (13. h8=Q Rbd3 {1.50/17
Houdini 3 Pro x64}) 13... Rbd3 14. Qh2 Rd5 15. Qf2+ (15. Qf2+ {1.84/31
Stockfish 8 64}) 15... Kb7 16. Ng3 R1d4 (16... R1d3) 17. Qf3 Nd6 18. Ne2 Rd2+
19. Kc3 Kxc7 20. Qe3 *



Last edited by Jon Fredrik Åsvang on Fri Feb 17, 2017 2:36 pm; edited 1 time in total
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Display posts from previous:   
Subject Author Date/Time
Difficult position for Stockfish Jouni Uski Thu Feb 16, 2017 10:07 pm
      Re: Difficult position for Stockfish Rob Nicholas Thu Feb 16, 2017 11:09 pm
      Re: Difficult position for Stockfish john dalhem Fri Feb 17, 2017 12:39 am
      Re: Difficult position for Stockfish Dann Corbit Fri Feb 17, 2017 1:14 am
      Re: Difficult position for Stockfish Michael B Fri Feb 17, 2017 1:32 am
      Re: Difficult position for Stockfish kgburcham Fri Feb 17, 2017 1:49 am
            Re: Difficult position for Stockfish Jouni Uski Fri Feb 17, 2017 8:19 am
                  Re: Difficult position for Stockfish Herbert L Fri Feb 17, 2017 1:07 pm
                        Re: Difficult position for Stockfish Jon Fredrik Åsvang Fri Feb 17, 2017 2:26 pm
                        Re: Difficult position for Stockfish S.Taylor Fri Feb 17, 2017 2:32 pm
      Re: Difficult position for Stockfish Damir Desevac Fri Feb 17, 2017 8:45 am
      Re: Difficult position for Stockfish Folkert van Heusden Fri Feb 17, 2017 3:00 pm
      Re: Difficult position for Stockfish Bernhard Bauer Fri Feb 17, 2017 3:19 pm
            Re: Difficult position for Stockfish Jon Fredrik Åsvang Sat Feb 18, 2017 10:30 am
      Re: Difficult position for Stockfish Vincent Lejeune Sat Feb 18, 2017 10:33 pm
            Re: Difficult position for Stockfish Vincent Lejeune Sat Feb 18, 2017 11:52 pm
                  Re: Difficult position for Stockfish Jon Fredrik Åsvang Sun Feb 19, 2017 3:28 pm
                        Re: Difficult position for Stockfish Jon Fredrik Åsvang Mon Feb 20, 2017 8:42 am
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