Author: martin fierz
Date: 07:36:35 03/31/04
Go up one level in this thread
On March 31, 2004 at 09:57:52, Dan Andersson wrote:
>On March 31, 2004 at 07:26:40, martin fierz wrote:
>
>>On March 31, 2004 at 06:31:28, Tord Romstad wrote:
>>
>>>I just completed a 100-game blitz match between Gothmog 0.4.7 and Crafty 19.9
>>>(yes, I know it is not the most recent version). In one of the games, the
>>>following position arised:
>>>
>>>[D]r2qr3/4bpkp/p2p2pN/1p1P4/2pNP3/1b5P/1P1Q1PP1/R3R1K1 w - -
>>>
>>>Here, Gothmog surprised me (and Crafty) by playing the knight sac Nxf7!?. It
>>>plays this after only 7 plies and 1 second, almost certainly as a speculative
>>>sac, but still keeps it with a +1 score after 20 minutes and 16 plies. In
>>>the game, Gothmog quickly got a winning attack after 24. Nxf7 Kxf7 25. Ne6 Qc8
>>>26. Qh6 Bf8 27. Qxh7+ Kf6 28. Re3.
>>>
>>>Which other engines like Nxf7? Is the sac correct?
>>
>>martin 1.0 thinks: this looks horrible for black. after 27. ...Kf6 it must be
>>game over, Q+R+N coordinating in an attack against an awful king with no serious
>>protection. so before that, you have to look for alternatives, 25. ...Qc8 is not
>>quite forced, check that position. but i'd be very surprised if this wasn't just
>>great for white. muse 0885 plays Nxf7 at depth 5 with a +1.3 score for white.
>>but try ...Qb6 instead of Qc8 and after Qh6 Reb8, to evacuate the king in case
>>of Qxh7+ Ke8 Qxg6+ Kd7 - in this position there is still a lot of fight left.
>
> A quick look at the variation 24.Nxf7 Kxf7 25.Ne6 Qb6 26.Qh6 Reb8 27.Qxh7+ Ke8
>28.Qxg6+ Kd7 and after 29.Qf5 it would seem that black is close to a total
>breakdown.
>[D]rr6/3kb3/pq1pN3/1p1P1Q2/2p1P3/1b5P/1P3PP1/R3R1K1 b - - 2 6
>
>MvH Dan Andersson
it would seem != is :-)
looks dangerous, i admit, but it's still much better than the position in the
game after ....Kf6. you can for instance continue with Rg8. i know, black must
be busted, but you still have to prove something with white.
cheers
martin
>
>>with the king on f6 it's (rather obviously to a human) totally hopeless.
>>
>>cheers
>> martin
>>
>>>
>>>Another cool game from the match was the following, which is probably
>>>not good, but amused me because of its "19th century look". It was played
>>>in Gothmog's new favorite opening, the King's gambit:
>>>
>>>[Event "Computer chess game"]
>>>[Site "aload.uio.no"]
>>>[Date "2004.03.31"]
>>>[Round "63"]
>>>[White "Gothmog 0.4.7"]
>>>[Black "Crafty-19.9"]
>>>[Result "1-0"]
>>>[TimeControl "300+1"]
>>>
>>>1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 c6 5. d4 Bb4 6. e5 Ne4 7. Kf1 Nxc3 8.
>>>bxc3 Bxc3 9. Ba3 b5 10. Bd6 bxc4 11. Qg4 g5 12. Nh3 Bxa1 13. Nxf4 h6 14.
>>>Nh5 Qb6 15. Qf5 Ba6 16. g4 Qxd4 17. Qf6 Qd1+ 18. Kg2 Qxc2+ 19. Kh3 Qd3+ 20.
>>>Ng3 Qxd6 21. Qxd6 Bb2 22. Qf6 d5 23. Qxh8+ Kd7 24. Qf8 Kc7 25. Qd6+ Kb6 26.
>>>Qb4+ Bb5 27. Qxb2 Nd7 28. Rb1 Kc7 29. Qb4 Nxe5 30. Nf5 Ng6 31. Qd6+ Kb7 32.
>>>Nd4 Nf4+ 33. Kg3 Ne2+ 34. Nxe2 Rc8 35. a4 a6 36. axb5 cxb5 37. Qxd5+ Kb6
>>>38. Nc3 h5 39. Nxb5 Rc5 40. Qd8+
>>>{Black resigns} 1-0
>>>
>>>Position after white's 17th move:
>>>
>>>[D]rn2k2r/p2p1p2/b1pB1Q1p/4P1pN/2pq2P1/8/P1P4P/b4K1R b kq -
>>>
>>>Tord
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