Author: Roy Eassa
Date: 12:50:01 12/04/01
Go up one level in this thread
On December 04, 2001 at 15:36:36, Uri Blass wrote:
>On December 04, 2001 at 15:03:48, Roy Eassa wrote:
>
>>On December 04, 2001 at 13:29:50, Roy Eassa wrote:
>>
>>>On December 04, 2001 at 10:34:00, K. Burcham wrote:
>>>
>>>>
>>>>looking for h4.
>>>>
>>>>[D] r5k1/4R1pp/2b2q2/2Bp4/p1p5/P4P2/1P1Q2PP/6K1 w - - 0 1
>>>>
>>>>
>>>>deep fritz h4 90 seconds depth 14/34 1380 kns
>>>> (h3 4 seconds)
>>>>deep junior7 h4 21 minutes depth 22 1850 kns
>>>> (h3 1 second)
>>>>deep shredder h4 41 minutes ? 530 kns
>>>> (h3 57 seconds)
>>>>
>>>>
>>>
>>>
>>>Could somebody please explain the idea behind h4?
>>
>>
>>Lookiing at the position with Fritz 6, it seems that h4 is the only move to both
>>give White's king an escape square AND threaten to push to h5 to chase Black's
>>queen from a key defensive square in key variations.
>>
>>1.h4
>>
>> [1.Qe3 Qg6 2.Re6 (2.Bd4 Re8 3.h3 Qb1+ 4.Kh2 Qg6) 2...Qb1+;
>>
>> 1.h3 Rc8 2.Qe3 Qg6 3.Bd4 Re8;
>>
>> 1.Rc7 Qe6 2.Bd4 (2.Qg5?? Qe1#) 2...Bd7]
>>
>>1...Qxh4
>>
>> [1...Rb8 2.Qe3 Qf5 (2...h6? 3.Bd4) 3.Bd6!
>> (or 3.Bd4 Rb7 4.Rxb7 Bxb7 5.Qe8+ Qf8 6.Qxa4)
>>
>> 3...Rf8
>> (3...Rc8 4.Be5;
>> 3...Rb7 4.Re8+ Kf7 5.Rf8+)
>> 4.Qc5 Be8 (4...Rc8 5.Be5) 5.Re1;
>>
>> 1...Rc8 2.Qe3 Qg6 3.h5! Qxh5 4.Qe6+;
>>
>> 1...h5 2.Rc7 Qe6 3.Qg5 Bd7 4.Bd4 Qf7 5.Bxg7]
>>
>>2.Qe3 Qh6
>>
>> [2...Qf6 3.Bd4]
>>
>>3.Qxh6 gxh6 4.Bd4 Re8 5.Rg7+ Kf8 6.Rxh7 Re6 7.Kf2 and White is a little better
>>(but can White win?)
>
>Your analysis is wrong
>Qxh4 is losing against Rc7
>
>Yace only material learned that Rc7 is winning and preferd c3
>see http://www.icdchess.com/forums/1/message.shtml?200343
>
>I am not sure if white is winning because black has other options like 1...c3
>or 1...Re8
>
>White has a pawn advnatage but I did not prove more than it.
>
>Uri
Somewhat corrected analysis, based on your input:
New position
1.h4
[1.Qe3 Qg6 2.Re6 (2.Bd4 Re8 3.h3 Qb1+ 4.Kh2 Qg6=) 2...Qb1+=;
1.h3 Rc8 2.Qe3 Qg6 3.Bd4 Re8=;
1.Rc7 Qe6 2.Bd4 (2.Qg5?? Qe1#) 2...Bd7=]
1...c3
[1...Rb8 2.Qe3 Qf5 (2...h6? 3.Bd4) 3.Bd6!
(or 3.Bd4 Rb7 4.Rxb7 Bxb7 5.Qe8+ Qf8 6.Qxa4)
3...Rf8
(3...Rc8 4.Be5;
3...Rb7 4.Re8+ Kf7 5.Rf8+)
4.Qc5 Be8 (4...Rc8 5.Be5) 5.Re1;
1...Rc8 2.Qe3 Qg6 3.h5! Qxh5 4.Qe6+;
1...h5 2.Rc7 Qe6 3.Qg5 Bd7 4.Bd4 Qf7 5.Bxg7;
1...Qxh4 2.Rc7 Re8 3.Bf2 Qf6 4.Bd4±;
1...Re8 2.Rxe8+ Bxe8 3.Qxd5+±]
2.Qxc3 Qxc3 3.bxc3±
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