Author: Dann Corbit
Date: 12:30:30 10/12/01
Go up one level in this thread
On October 12, 2001 at 14:16:48, Roy Eassa wrote:
>On October 12, 2001 at 00:24:03, Miguel A. Ballicora wrote:
>
>>On October 11, 2001 at 23:50:37, Slater Wold wrote:
>>
>>>I will be burning in the new system tonite, and giving 1 position about 18 hours
>>>of thinking time.
>>>
>>>Anyone have a request on the position?
>>>
>>>I will be checking back here in about 30 minutes, and if anyone has responded, I
>>>will analyze that position.
>>>
>>>If not, I will just use Nolot #9 or something.
>>>
>>>First come first serve, and please make it a good one. :)
>>>
>>>
>>>Thanks!
>>
>>I posted this already and was not solved. I wonder how long it will take
>>too avoid horizon problems. The Q in b8 should end up in the h column
>>mating the king after sacrificing everything Bb4 Rh8+ Rh1+ Rh8+ Rh1+ qh8+
>>Qh3.
>>
>>[D]2rr1b2/8/ppkq1pP1/3pp3/2p5/2BPPpP1/BQ3P2/1RRN1n1K b - - bm Qb8; id "WCSAC.0580";
>
>
>I'm not convinced Black can win.
>
>Here's some analysis with the help of Fritz 6 (AMD 1.2):
>
>1...Qb8 2.Kg1! Nh2
>
> [2...Ba3? 3.Qxa3! Rh8 4.Qe7! Rh1+ 5.Kxh1 Rh8+ 6.Kg1;
> 2...Bb4 3.Kxf1!
> (3.Bxb4?? Rh8 4.g7
> (4.Rxc4+ dxc4 5.Bf8!
> (5.g7?? Rh1+ 6.Kxh1 Rh8+)
> 5...Rcxf8 6.g7 Rfg8!
> (6...Rh1+? 7.Kxh1 Rh8+ 8.Kg1)
> 7.Qxb6+ Qxb6 8.Rxb6+ Kxb6 9.gxh8Q Rxh8 10.Bxc4 Nd2-+;
> 4...Rh1+ 5.Kxh1 Rh8+ 6.Kg1 Qc8 7.gxh8Q Qxh8;
> 3...Rh8 4.Ke1]
>
>3.dxc4!
>
> [3.Kxh2? Bc5!
> (3...Bb4? 4.Qxb4 Rh8+ 5.Kg1 Rh1+ 6.Kxh1 Rh8+ 7.Kg1 Rh1+ 8.Kxh1 Qh8+ 9.Kg1
>b5 10.Qa3+-;
> 3...Ba3? 4.Qxa3 Rh8+ 5.Kg1 Rh1+ 6.Kxh1 Rh8+ 7.Kg1 Rh1+ 8.Kxh1 Qh8+ 9.Kg1
>Qh3 10.Rxb6+ Kxb6 11.Rb1+ Kc6 12.Qxa6+ Kd7 13.Rb7+ Kd8 14.Qd6+ Ke8 15.Qe7#)
> 4.dxc4 Rh8+ 5.Kg1 Rh1+ 6.Kxh1 Rh8+ 7.Kg1 Rh1+ 8.Kxh1 Qh8+ 9.Kg1 Qh3-+]
>
>3...Bc5
>
> [3...Ng4 4.cxd5+ Kd7 5.Qxb6]
>
>4.cxd5+ Kd7 5.Qc2
>
>
>The problem seems to be that ...Nh2 gets in the way of Black's attack, and other
>moves allow White to launch a counter-attack or get his Queen to e7, from which
>it can block on h7 (supported by a Pawn on g7).
After Qb8, here is what The Crazy Bishop sees:
setboard 1qrr1b2/8/ppk2pP1/3pp3/2p5/2BPPpP1/BQ3P2/1RRN1n1K w - -
level 1 2400 24000
go
3. 373 0 1178 dxc4 d4
4. 358 1 3952 dxc4 d4 exd4 exd4 Bxd4
5. 371 3 14569 dxc4 d4 exd4 Bg7
6. 376 9 38468 dxc4 d4 exd4 Bg7 d5+ Kc7 Bb3
7. 382 30 151042 dxc4 d4 exd4 Bh6 Rc2
8. 375 70 345870 dxc4 d4 exd4 Bh6 Rc2 Rh8
9. 374 213 1034333 dxc4 d4 exd4 exd4 Bxd4 Bc5 Bxc5 Nxg3+ fxg3 Rh8+ Kg1
Qxg3+
10. 172 1332 6285935 dxc4 Ba3 Qxb6+ Qxb6 cxd5+ Kb7 Rxb6+ Kxb6 Rb1+ Ka7 Kg1
Rxc3 Nxc3 Rc8
10. 173 1842 8728603 Kg1
10. 361 2871 13775708 Kg1 Nxe3 fxe3 Bc5 dxc4 d4 Bd2 e4 Kf2 dxe3+
11. 359 6988 33476758 Kg1 Nxg3 fxg3
12. 358 12277 58023101 Kg1 Nxg3 fxg3 Bc5 Qf2 cxd3 Ba5 e4
13. 347 35597 163125990 Kg1 Nxg3 fxg3 Bc5 dxc4 d4 Qf2 dxc3 Qxf3+ Kc7 Nxc3 Rd6
Nd5+ Kd8 g7
14. 386 123356 565505794 Kg1 Nxg3 fxg3 Bc5 Qf2 cxd3 Ba5
I'm a chess idiot, so take this with a grain of salt...
If black has any way to win at all (he's behind and that's for sure anyway) then
he has to be willing to give up the knight, the bishop (and the rooks too) and
eventually win by cramming attackers down the open h-file slot. The black pawn
has got to stay on f3, too (I think). I see the sequence {something} like this:
[D]2rr1b2/8/ppkq1pP1/3pp3/2p5/2BPPpP1/BQ3P2/1RRN1n1K b - -
[D]1qrr1b2/8/ppk2pP1/3pp3/2p5/2BPPpP1/BQ3P2/1RRN1n1K w - -
[D]1qrr1b2/8/ppk2pP1/3pp3/2p5/2BPPpP1/BQ3P2/1RRN1nK1 b - -
[D]1qrr4/8/ppk2pP1/3pp3/2p5/b1BPPpP1/BQ3P2/1RRN1nK1 w - -
[D]1qrr4/8/ppk2pP1/3pp3/2p5/Q1BPPpP1/B4P2/1RRN1nK1 b - -
[D]1qr4r/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1nK1 b - -
[D]1qr5/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1nKr w - -
[D]1qr5/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1n1K b - -
[D]1q5r/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1n1K w - -
[D]1q5r/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1nK1 b - -
[D]1q6/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1nKr w - -
[D]1q6/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1n1K b - -
[D]7q/4Q3/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1n1K w - -
Unfortunately, white seems to have a kick save (and a beauty) which stops the
black queen from saving the day:
[D]7q/7Q/ppk2pP1/3pp3/2p5/2BPPpP1/B4P2/1RRN1n1K b - -
So there must be some way to keep white's queen from that dastardly deed if the
position is to work.
On the other hand, I may completely misunderstand the whole idea!
;-)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.