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Subject: Re: Can programs find the Lasker move? (Bxa6!!)

Author: Uri Blass

Date: 22:53:31 08/28/02

Go up one level in this thread


On August 29, 2002 at 00:10:54, Mike Byrne wrote:

>On August 28, 2002 at 23:24:37, Mike Byrne wrote:
>
>>On August 28, 2002 at 23:03:19, Tanya Deborah wrote:
>>
>>>
>>>Hi CCC!
>>>
>>>Look the 17. Lasker move (Bxa6!!)
>>>
>>>Great game!  Any program  can find this move?
>>>
>>>
>>>
>>>
>>>Lasker - Marshall  (1914 St Petesburgo)
>>>
>>>1. e4   e5
>>>2. Nf3  Nf6
>>>3. Nxe5 d6
>>>4. Nf3  Nxe4
>>>5. Qe2  Qe7
>>>6. d3   Nf6
>>>7. Bg5  Be6
>>>8. Nc3  Nbd7
>>>9. O-O-O h6
>>>10. Bh4 g5
>>>11. Bg3 Nh5
>>>12. d4  Nxg3
>>>13. hxg3 g4
>>>14. Nh4 d5
>>>15. Qb5 O-O-O
>>>16. Qa5 a6
>>>17. Bxa6 bxa6
>>>18. Qxa6+ Kb8
>>>19. Nb5 Nb6
>>>20. Rd3 Qg5+
>>>21. Kb1 Bd6
>>>22. Rb3 Rhe8
>>>23. a4  Bf5
>>>24. Na7 Bd7
>>>25. a5  Qd2
>>>26. axb6 Re1+
>>>27. Ka2 c6
>>>28. Nb5 cxb5
>>>29. Qa7+
>>>
>>>There are a good defence for Black after 17.Bxa6! ? Some programs seems really
>>>advantage for White after this move.
>>============================================================================
>>Position after 16. ...16
>>[D] 2kr1b1r/1ppnqp2/p3b2p/Q2p4/3P2pN/2N3P1/PPP2PP1/2KR1B1R w - - 0 1
>
>
>this is pretty deep,
>
> if I force:
>     white       black
>  1  Bxa6        bxa6
>  2  Qxa6+       Kb8
>and hit go - I'm failing high after 15 minutes in the 15th ply - so it would
>take at least 19 or 20 ply for Crafty SE 17.16 to see this...

I am not sure because Qxa6+ is check and can trigger an extension and Kb8 is
the only reply for it so it also can trigger an extension.

Uri



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