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Subject: Re: Hard test position

Author: Karlo Bala

Date: 12:14:17 05/05/05

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On May 05, 2005 at 05:50:27, Joachim Rang wrote:

>On May 04, 2005 at 17:56:37, Uri Blass wrote:
>
>>On May 04, 2005 at 15:56:39, Joachim Rang wrote:
>>
>>>On May 04, 2005 at 04:38:15, Uri Blass wrote:
>>>
>>>>On May 04, 2005 at 03:44:25, Uri Blass wrote:
>>>>
>>>>>On May 04, 2005 at 02:12:43, Randy Lovelace wrote:
>>>>>
>>>>>>On May 04, 2005 at 01:40:30, Jouni Uski wrote:
>>>>>>
>>>>>>>Can't black simple take 17. - hxg5 ? How does white continue?
>>>>>>>
>>>>>>>Jouni
>>>>>>>
>>>>>>>>
>>>>>>>>[Event "URS-ch06 Odessa qf1 "]
>>>>>>>>[Site "?"]
>>>>>>>>[Date "1929.01.01"]
>>>>>>>>[Round "?"]
>>>>>>>>[White "Bernstein, A"]
>>>>>>>>[Black "Sorokin, N"]
>>>>>>>>[Result "1-0"]
>>>>>>>>[ECO "C17"]
>>>>>>>>[Opening "French"]
>>>>>>>>[Variation "Winawer, advance, Bogolyubov variation"]
>>>>>>>>
>>>>>>>>1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.a3 Bxc3 7.bxc3 b6 8.Nf3 Ba6
>>>>>>>>9.Bxa6 Nxa6 10.O-O Qd7 11.a4 Nb8 12.Be3 Nf5 13.dxc5 Nxe3 14.fxe3 bxc5 15.
>>>>>>>>Ng5 O-O 16.Qh5 h6 17.Rf6 Nc6 18.Rxh6 gxh6 19.Qxh6 f6 20.exf6 Ne5 21.Rf1
>>>>>>>>Rab8 22.Rf4 Rb1+ 23.Kf2 Rxf6 24.Qxf6 1-0
>>>>>>
>>>>>>
>>>>>>17.  ...   hxg5
>>>>>>18 Raf1    Nc6
>>>>>>19 Rf3      g4
>>>>>>20 Rf4
>>>>>>
>>>>>>your engine should see it now.
>>>>>
>>>>>
>>>>>I assume you mean 19.R1f3 and 20.R3f4
>>>>>
>>>>>There are more possible lines
>>>>>
>>>>>For example 17...hxg5 18.Raf1 Qb7 and I do not see more than a draw for white
>>>>>after a line like 19.R1f3 g4 20.Qxg4 Qb1+
>>>>
>>>>19.R1f3 seems to be not good because of 19...Qb1+( I analyzed both 19.R1f3 and
>>>>19.R6f3 that is better and simply forgot the right line).
>>>>
>>>>In any case I do not see win for white after 19.R6f3 g4 20.Qxg4
>>>>
>>>>Uri
>>>
>>>
>>>I don't see how black can play 19...Qb1+ in your variation. It seems you messed
>>>up the position.
>>>
>>>regards Joachim
>>
>>I see nothing illegal with 19...Qb1+
>>
>>[Event "Edited game"]
>>[Site "URI-AMD"]
>>[Date "2005.05.05"]
>>[Round "-"]
>>[White "-"]
>>[Black "-"]
>>[Result "*"]
>>
>>1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2 Ne7 6. a3 Bxc3 7. bxc3 b6 8.
>>Nf3 Ba6 9. Bxa6 Nxa6 10. O-O Qd7 11. a4 Nb8 12. Be3 Nf5 13. dxc5 Nxe3 14.
>>fxe3 bxc5 15. Ng5 O-O 16. Qh5 h6 17. Rf6 hxg5 18. Raf1 Qb7 19. R1f3? Qb1+
>>*
>>
>>19.R6f3+ is better and seems to lead to equal position.
>
>
>Hi Uri,
>
>it was a confusion by me. I thought you were talking about the variation after
>18...Nc6?, but in fact you were talking about 18...Qb7!.
>


>Now it's clear, 18...Qb7! keeps the position equal.
>
>regards Joachim

...
18...Qb7 19. h4!?




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