Author: Terry McCracken
Date: 11:15:21 04/01/02
Go up one level in this thread
On April 01, 2002 at 12:23:31, Roy Eassa wrote:
>On March 31, 2002 at 20:51:20, Terry McCracken wrote:
>
>>On March 31, 2002 at 19:19:52, Will Singleton wrote:
>>
>>>On March 31, 2002 at 18:43:08, K. Burcham wrote:
>>>
>>>>
>>>>here GM Spassky played 15.Nd6
>>>>
>>>> [D] r1bqr1k1/pppnbpp1/7p/2P5/3PN3/3Q1N2/PPB1p1PP/R4RK1 w - - 0 15
>>>>
>>>>[Site "Leningrad ch-SU"]
>>>>[Date "1960.??.??"]
>>>>[Round "16"]
>>>>[White "Spassky B V"]
>>>>[Black "Bronstein,David"]
>>>>[Result "1-0"]
>>>>[ECO "C36"]
>>>>
>>>>1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Bd6 5. Nc3 Ne7 6. d4 O-O 7. Bd3
>>>>Nd7 8. O-O h6 9. Ne4 Nxd5 10. c4 Ne3 11. Bxe3 fxe3 12. c5 Be7 13. Bc2
>>>>Re8 14. Qd3 e2 15. Nd6 Nf8 16. Nxf7 exf1=Q+ 17. Rxf1 Bf5 18. Qxf5 Qd7
>>>>19. Qf4 Bf6 20. N3e5 Qe7 21. Bb3 Bxe5 22. Nxe5+ Kh7 23. Qe4+
>>>> 1-0
>>>>
>>>>(must put settings on: mate in 25 or less, favour sacs, white rook value=1,
>>>> black king=5x default, white Night =.5) just kidding, but this is tough
>>>>for most programs.
>>>>
>>>>kburcham
>>>
>>>Hmmm, what happens after 15... exf1=Q+ Rxf1 Bxd6 Qh7+ etc?
>>>
>>>Will
>>
>>15.Nd6!? was a "Trap", it didn't "Force" a win or lose, but after Nf8?? White of
>>course wins easily:)
>>
>>The famous Bluebird game. This game also appears in a James Bond Movie; From
>>Russia with Love.
>>
>
>
>Very interesting! However, that doesn't answer the question of how White even
>survives after 1.Nd6?! exf1Q+ 2.Rxf1 Bxd6 3.Qh7+ Kf8
>
>There are numerous variations in which Black gets mated, but a few (marked
>"unclear" below) in which Black may end up surviving to win:
>
>1.Nd6?! exf1Q+ 2.Rxf1 Bxd6 3.Qh7+ Kf8 4.Qh8+ Ke7 5.Re1+ Ne5
>
> [5...Be5 6.Qxg7 Rg8 7.Nxe5 Nxe5
> (7...Rxg7? 8.Ng6+ Kf6 9.Rf1+ Kg5 10.h4+ Kh5 11.g4+ Kxg4
> 12.Bd1+ Kg3 13.Rf3+ Kg4 14.Rf2+ Kh3 15.Rh2+ Kg3 16.Rg2+ Kh3 17.Bg4#)
> 8.Rxe5+ Be6 9.Rxe6+! Kd7
> (9...Kxe6? 10.Qe5+ Kd7 11.Bf5+ Kc6 12.Be4+ Kd7 13.c6+ Kc8
> 14.cxb7+ Kd7 15.Bf5+ Kc6 16.Qc5+ Kxb7 17.Qb5#)
> 10.Qxf7+ Kc8 11.d5 Rf8 12.Qg7 Rg8 13.Qe5 +-]
>
>6.Qxg7
>
> [6.cxd6+ cxd6 7.Qxg7 unclear]
>
>6...Kd7
>
> [6...Be6 7.cxd6+ cxd6 8.dxe5 Rg8 unclear]
>
> [6...Rg8 7.Qxh6 Be6 8.cxd6+ cxd6 unclear]
>
>7.Nxe5+ Rxe5
>
> [7...Bxe5? 8.Qxf7+ Qe7 9.Qd5+ Bd6 10.Ba4+ c6 11.Rxe7+ +-]
>
>8.dxe5 Bxc5+ 9.Kh1 Qe7
>
> [9...Kc6 10.Qxf7 Qd2 11.Qg6+ Kb5 12.Rd1 =]
>
>10.Rf1 Kc6 11.Rxf7 Qg5 12.Rxc7+ Kb6 13.Qxg5 hxg5 14.Rg7 Bd4
>
> [or 14...Be3 15.Rg8 Kc5 16.Bf5 Bxf5 17.Rxa8 Kd5 -/+]
>
>15.Rxg5 Bd7 -/+
I was lazy, I let Shredder Paderborn look at this position:)
It could go like this which would draw by perpetual check. Main Line?
[Event "?"]
[Site "?"]
[Date "2002.04.01"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[D]r1bqr1k1/pppnbpp1/7p/2P5/3PN3/3Q1N2/PPB1p1PP/R4RK1 w - -
1. Nd6 {4s} exf1=Q+ {4s} 2. Rxf1 {1s} Bxd6 {19s} 3. Qh7+
{49s} Kf8 {4s} 4. cxd6 {6s} cxd6 {4s} 5. Qh8+ {10s} Ke7
{4s} 6. Re1+ {4s} Ne5 {4s} 7. Qxg7 {12s} Rg8 {3s} 8. Qxh6
{9s} Qb6 {1:39m} 9. Kh1 {3s} Be6 {3:23m} 10. dxe5 {1s} d5
{2:16m} 11. Ba4 {1:01m} Qf2 {55s} 12. Qf6+ {33s} Kf8 {7s}
13. Qh6+ {52s} Ke7 {6s} 14. Qf6+ {5s} Kf8 {15s} 15. Qh6+
{6s} Ke7 {4s} *
[D]r5r1/pp2kp2/4b2Q/3pP3/B7/5N2/PP3qPP/4R2K w - -
Terry
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