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Normal Topic Finalgen (Read 4221 times)
Poghosyan
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Re: Finalgen
Reply #3 - 06/18/12 at 17:04:40
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As expected 7-man TB has confirmed that the Kraemer study is sound and the refutation of my line by Girkassa is correct!

[Result "1-0"]
[FEN "8/1R6/PP6/8/8/1K3k2/7p/5r2 w - - 0 1"]

1. Rf7+ Kg2 2. Rg7+ Kh1 (2... Kf3 3. a7 Rb1+ 4. Kc3 Rc1+ 5. Kb4 Rb1+ 6. Kc5
Rc1+ 7. Kd6 Ra1 8. Rh7 Kg3 9. Rxh2 Kxh2 10. b7 Rxa7 11. b8=Q $1  11... Rh7 12.
Ke6+ Kh3 13. Qb3+ Kg4 14. Qc4+ Kg5 15. Qd5+ Kf4 16. Qf5+ Ke3 17. Qxh7 Kd4 18.
Qc2 Ke3 19. Qc3+ Kf4 20. Qe1 Kf3 21. Kf5 Kg2 22. Kg4 Kh2 23. Kf3 Kh3 24. Qg3#)
3. a7 Rf3+ 4. Kb4 Rf4+ 5. Kc5 Rf5+ 6. Kc6 Rf6+ 7. Kd7 Rd6+ 8. Ke8 Rd8+ 9. Kf7
Rf8+ 10. Kg6 Rf6+ 11. Kh5 Rh6+ 12. Kg5 Rh5+ 13. Kf6 Rf5+ 14. Ke7 Re5+ 15. Kd7
Rd5+ 16. Kc7 Rc5+ 17. Kb7 Rg5 18. Rf7 Ra5 19. a8=R Rg5 20. Kc7 Kg2 21. Ra2+
Kh3 22. b7 Rc5+ 23. Kb6 Rc6+ 24. Ka7 h1=Q 25. Rh7+ Kg4 26. Rxh1 Rc7 27. Rf1
Rd7 28. Rg2+ Kh3 29. Rg6 Kh2 30. Ka8 Rd8+ 31. b8=Q+ Rxb8+ 32. Kxb8 Kh3 33.
Rh1# 1-0.

I have proved this position also with Finalgen. It does not give a definitive answer. It gives Rc7+ as “White does not lose” and Ra7 as “draw”. On the other hand I proved some other 2 versus 1 rook endings where Finalgen gives a definitive evaluation of the positions.
  
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Poghosyan
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Re: Finalgen
Reply #2 - 06/15/12 at 15:49:38
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This is really a very good idea! I have just got a registration in the Rybka forum and sent an inquiry for the Kraemer study though I am pretty sure that Girkassa`s refuation of my line is correct. 

  
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Vass
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Re: Finalgen
Reply #1 - 06/15/12 at 11:30:45
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d_d wrote on 06/15/12 at 09:36:14:
In the light of the above, there is a possibility to cross-check the endings discussed earlier in other threads.

Yes, a good point!  Wink
  
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d_d
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Finalgen
06/15/12 at 09:36:14
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Some endings, with seven or more pieces but only one major or minor piece per side can be solved using this tool: http://www.mtu-media.com/finalgen/home_ing.php.

Also, is is reported that seven men tablebases for Rook and two pawns vs Rook and pawn have been generated: http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?tid=24816;pg=1

In the light of the above, there is a possibility to cross-check the endings discussed earlier in other threads.
  
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