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Up Topic The Rybka Lounge / Test Positions / Help save Ottó Titusz Bláthy (see yacpdb id 278043)
- - By user923005 (****) [us] Date 2018-01-26 20:01 Edited 2018-01-26 20:08
I intended to prove the correctness of a problem by Ottó Titusz Bláthy by deep computer analysis.
Unfortunately, there appears to be a few flaws in the analysis, at least one of which is fatal.
See the attached EPD file for analyzed positions from the special problem in question.

The most pivotal position from the proposed solution appears to be this one, where a capture results in a draw (the computer analysis for the position is formatted as PGN).

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[FEN "8/5k2/8/2Bp2pb/p1pPp1p1/1pP1PpP1/1P2RP2/2KN3N b - - 0 1"]
[Setup "1"]

1... fxe2 2. Kd2 exd1=Q+ 3. Kxd1 Kf6 4. Bb6 Be8 5. Bd8+ Kg6 6. Be7 Kf5 7.
Kd2 Bg6 8. Bd6 Be8 9. Kc1 Ke6 10. Be5 Kf5 11. Bg7 Bd7 12. Kd2 Be8 13. Bh6
Bd7 14. Kc1 Kf6 15. Bf8 Kf5 16. Kd2 Be8 17. Bb4 Bf7 18. Ba3 Bh5 19. Kc1 Bg6
20. Be7 Be8 21. Kb1 Bg6 22. Bb4 Be8 23. Kc1 Ke6 24. Kd2 Kf5 25. Bf8 Ke6 26.
Bh6 Kf5 27. Bg7 Bd7 28. Be5 Be8 29. Kc1 Ke6 30. Kb1 Kf5 31. Bc7 Bc6 32. Kc1
Kg6 33. Be5 Kf5 34. Bd6 Be8 35. Bc7 Bd7 36. Kd2 Be8 37. Bb6 *


In the attached EPD file, the field c3 represents the move proposed in the suggested solution.
Attachment: otb.epd - yacpdb id 278043 solution analyzed to depth (52k)
Attachment: otb.7z - Update of the EPD data, analyzed to 70 plies (10k)
Parent - By user923005 (****) [us] Date 2018-01-29 19:35
There is quite a bit of analysis on TalkChess for this position:
http://www.talkchess.com/forum/viewtopic.php?topic_view=threads&p=748754&t=66422
Parent - - By user923005 (****) [us] Date 2018-01-29 19:43
The root position of the puzzle and two auxiliary positions have been analyzed to greater depth:

4k3/6p1/8/3p3b/p1pPp1pP/BpP1PpP1/1P3P1R/K2N3N w - - acd 107; ce 1153; acs 39600;
pv Kb1 Kf7 Kc1 Ke6 Bb4 Kf6 Kb1 Ke6 Bf8 Kf7 Bd6 Kg8 Kc1 Kf7 Kd2 Kg8 Ke1 g6 Kf1 Kg7 Ba3 Kf7 Kg1 Kg7 Bb4 Kg8 Kf1 Kh7 Bc5 Kg7 Be7 Kf7 Bb4 Kg7 Bc5 Kg8 Ba7 Kg7 Bb6 Kf7 Kg1 Kf6 Bc5 Kg7 Ba3 Kf7 Bd6 Kg8 Bc7 Kg7 Ba5 Kf7 Kf1 Kg7 Bc7 Kf6 Be5+ Kf7 Bf4 Kf8 Bh6+ Kg8 Ke1 Kf7 Bf4 Kg7 Kd2 Kg8 Be5 Kf7 Kc1 Ke6 Kb1 Kf7 Bf4 Kg7 Kc1 Kf7 Bh6 Kf6 Kb1 Kf7 Ka1 Kg8 Bf4 Kf7 Bc7 Kg7 Be5+ Kf7 Kb1 Kg8 Bf6 Kf7 Bg5 Kg8 Ka1 Kf7 Bd8 Kg8 Bb6 Kf7 Ba5 Kg7 Bb4 Kg8 Be7 Kf7 ; bm Kb1;

8/5k2/8/2Bp2pb/p1pPp1p1/1pP1PpP1/1PR2P2/3NK2N b - - acd 126; ce -186; acs 86400;
pv bxc2 Kd2 cxd1=R+ Kxd1 Ke6 Ba3 Kd7 Kc1 Kc6 Kc2 Bf7 Be7 Be8 Bf8 Bd7 Ba3 Kb7 Kc1 Bf5 Kb1 Kc6 Be7 Kb5 Ka2 Be6 Bxg5 Bc8 Be7 Bf5 Ba3 Be6 Bc5 Ka5 Bd6 Kb5 Ka3 Bd7 Bc5 Be6 Bb4 Bd7 Be7 Be6 Bc5 Bd7 Bf8 Be6 Bh6 Bc8 Bg5 Bd7 Bf6 Be6 Bd8 Bg8 Bg5 Be6 Bf4 Bd7 Bd6 Bf5 Bc7 Be6 Ka2 Bf5 Bd8 Bd7 Ka3 Bf5 Bh4 Bd7 Ka2 Be6 Bf6 Bf5 Be5 Be6 Ka3 Bd7 Bg7 Be6 Bf6 Bd7 Be5 Be6 Bg7 Bf7 Bh6 Be6 Bf8 Bd7 Bb4 Be6 Ka2 Bd7 Kb1 Be6 Be7 Bf5 Kc2 Bg6 Bd6 Bf5 Kd2 Bd7 Bb4 Kb6 Kd1 Kb7 Be7 Ka8 Ba3 Bc6 Kc1 Bb7 Kb1 Bc8 Bd6 Kb7 Ka1 Kc6 Be5 a3 bxa3 Bd7 Bf4 Kb6 ; bm bxc2;

8/5k2/8/2Bp2pb/p1pPp1p1/1pP1PpP1/1P2RP2/3NK2N b - - acd 98; ce -1022; acs 86400;
pv Bg6 Kd2 Kf6 Re1 Bf7 Kc1 Bg6 Bb6 Ke7 Rg1 Ke8 Rf1 Ke7 Ba5 Bh5 Rg1 Bg6 Bb4+ Kf7 Kb1 Kf6 Bc5 Kf7 Re1 Ke8 Ba3 Kf7 Rg1 Ke6 Bf8 Kf6 Bb4 Kf7 Bc5 Bf5 Rf1 Be6 Bd6 Bd7 Re1 Be6 Rg1 Kg6 Kc1 Bf7 Re1 Be6 Bc5 Bf7 Be7 Be6 Kb1 Bd7 Bc5 Be6 Rg1 Kg7 Kc1 Kg6 Bb6 Kh7 Bd8 Kg6 Be7 Bf7 Bd6 Kh6 Re1 Bg6 Be7 Bf5 Kb1 Kg6 Rf1 Be6 Bd8 Bf5 Re1 Bd7 Bb6 Bf5 Rg1 Be6 Rf1 Bd7 Bc5 Bf5 Bf8 Be6 Kc1 Kf7 Bd6 Kg6 Re1 Kf7 Kb1 Kf6 ; bm Bg6;
Parent - By MoKy (**) [sk] Date 2018-02-24 01:03 Edited 2018-02-24 01:05
8/3b1k2/8/2Bp2p1/p1pPp1p1/1pP1PpP1/1P3P2/3N1KRN w - - 0 4


Rg2 fxg2+ Kxg2 Kg6 Kh2 Kh5 f4 gxf3 g4+ Kxg4 Ndf2+ Kh5 Ng3+ Kh4 Ngxe4 dxe4 Nxe4
Parent - - By MoKy (**) [sk] Date 2018-02-24 00:38 Edited 2018-02-24 00:55
Rook can use the d3 square.
Parent - - By user923005 (****) [us] Date 2018-02-26 09:42
Rook can be captured on d3 by the pawn, and further since the king has to traverse, the capture can happen on the fortuitous side.
Parent - By MoKy (**) [sk] Date 2018-02-26 15:41
Both alternatives cxd3 c4 dxc4 Nc3 and exd3 e4 dxe4 Ne3 look easily winning to me.
Up Topic The Rybka Lounge / Test Positions / Help save Ottó Titusz Bláthy (see yacpdb id 278043)

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