Author: Roy Eassa
Date: 09:23:31 04/01/02
Go up one level in this thread
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 -/+
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