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Subject: Re: Mystery solved by Gambit Tiger

Author: Hermano Ecuadoriano

Date: 07:16:34 02/02/01

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On February 02, 2001 at 08:14:03, David Dahlem wrote:

>
>On February 02, 2001 at 07:53:30, Hermano Ecuadoriano wrote:
>
>>On February 02, 2001 at 03:19:14, Timothy J. Frohlick wrote:
>>
>>>On February 02, 2001 at 01:28:59, Jouni Uski wrote:
>>>
>>>>[D]8/6kn/3B3p/5K1B/8/8/8/8 b - -
>>>>
>>>>resign 1-0! Why? Is this really white's win?
>>>>
>>>>JouniDate: 1/2/2001
>>>
>>>Jouni,
>>>
>>>Gambit Tiger without tablebases solves this as a mate in 46 in 26 minutes on a
>>>PII 333 with 48 Megs Hash.
>>>
>>>1... Ng5 2. Bc5 Nf7 3. Bd4+ Kf8 4. Kf6 Ng5 5. Bc5+ Kg8 6. Kf5 Nf7 7. Be7 Ng5 8.
>>>Bb4 Nf7 9. Kg6 Ne5+ 10. Kf6 Nd7+ 11. Ke7 Ne5 12. Bc3 Nc6+ 13. Ke8 Kh7 14. Kf7
>>>Ne5+ 15. Kf6 Nc6 16. Bf3 Nd8 17. Bb4 h5 18. Be4+ Kh8 19. Be7 Nc6 20. Bxc6 Kh7
>>>21. Be4+ Kg8 22. Kg6 Kh8 23. Bd5 h4 24. Bf6#
>>
>>I can't come anywhere close to duplicating this. In fact, I can play forward all
>>the way to the position after 15. Kf6, and it still takes 6 minutes to
>>find a mate. And then, it isn't nine more moves, as your solution suggests.
>>It says mate in 16. That would be a total of 61 plies from the initial position.
>>That's a bit of a stretch, even for Gambit Tiger.
>>Maybe I've done something wrong. I hope someone else will try this.
>>
>I'm not really sure if 2.Nf7 is black's best choice. I did some infinite
>analysis with Fritz 6 and Nimzo 8. They both like 2....Nh3 and stayed there for
>at least 10 minutes.

This isn't about just GOOD moves: I think Timothy J. Frohlick posted that
Gambit Tiger found a FORCED MATE in 24 as given above, without TBs of
course. My Gambit Tiger comes NOWHERE CLOSE, and I am very curious whether
or not one of us has made a mistake. (I have other reasons for thinking that
I might be doing something wrong, and I'm on the lookout.)

>
>Dave



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