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Subject: Re: positions to search deep for hours at 500 cpu's

Author: Vincent Lejeune

Date: 04:21:02 09/20/03

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On September 19, 2003 at 15:04:57, Alexander Kure wrote:

>On September 19, 2003 at 11:49:11, Vincent Lejeune wrote:
>
>[..]
>
>>[d]r3kb1r/1bq2pR1/p4P2/3Pp2p/1p6/6QB/PPP4P/2KR4 b kq - 0 23
>>
>>
>>this pos come from this moves :
>>
>>[Event "?"]
>>[Site "?"]
>>[Date "2003.??.??"]
>>[Round "?"]
>>[White "x"]
>>[Black "y"]
>>[Result "*"]
>>[ECO "B99"]
>>
>>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3
>>Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. f6 gxf6 15.
>>gxf6 Bf8 16. Rg1 h5 17. Rg7 b4 18. Nd5 exd5 19. exd5 Nd7 20. Nc6 Bb7 21. Bh3
>>Ne5 22. Nxe5 dxe5 23. Qg3 *
>>
>>here 2 possible lines : 1)23...Rd8 24.Rg5 Rd6 25.Rxe5+ Rd8...
>>                        2)23...h4 24.Qg5 Qd6 25.Be6 ...
>>
>
>[..]
>
>23.Qg3? is not the best move. After consulting the Fritz 8 book it seems that
>23. Qb3! is much stronger. 21. Ne5? is also bad. Better is 21. Bxc6.
>You can find all the moves in the Fritz 8 book.
>
>Greetings
>Alex

Can you convinced me why 21. Bxc6 is stronger than 21. Ne5 ? and why 23. Qb3 is
stronger than 23.Qg3 ?
It's so complicated I need a lot of lines to be convinced ! :)



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