Author: Robert Hyatt
Date: 17:09:39 10/24/02
Go up one level in this thread
On October 24, 2002 at 18:35:54, martin fierz wrote:
>On October 24, 2002 at 17:17:19, Robert Hyatt wrote:
>
>>Here is a game where Kramnik played black, and he made the same sort of
>>sacrifice he made against Deep Fritz, but he made it against Anand, and he
>>got rapped for it. Crafty says this just drops a piece. I ran the position
>>after
>>Bxf2 to a pretty deep depth and the score didn't change as I even followed the
>>game for a move or two deeper. If you let Crafty search for a black move
>>there, it likes either the rook move as suggested in the annotation, or Nd8
>>if you let it search longer than one second... Score after Bxf2 is +3.5, score
>>after Nd8 is +.5.
>>
>>That seems to qualify as either a blunder or unsound sac... your choice. Here
>>is the relevant PGN:
>
>just took a quick look, and i see 1) that this is game 118 of the database, so
>if you are going through it sequentially, then my assumption that 1 blunder out
>of 8 games is uncharacteristic seems to hold,
I don't disagree at all about "one out of eight". However, a more global view
might be "one out of N" where N includes the last N-8 games played.
But to pick this game, I didn't start at the front or rear, I did a bit of
grepping to
find a pretty big score swing and started there... The first couple I found
were bogus,
in that deeper searches showed the best move to be much closer to the move
played
than the one second search...
and 2) i think it's clear that
>this is the type of Nxf7 mistake, not a Qc4-like blunder. it's not as if he
>played Bxf2 and after Kxf2 went "oh my god, i just lost a piece" :-)
>it's much more likely that he thought he had something for his piece and had
>nothing in the end, like against fritz. of course we will not know what position
>he misassessed in this variation so it's hard to say if he miscalculated
>something at ply 3 or ply 13 or whatever...
>i think in the fritz game the programs also say that Nxf7 just drops a piece.
>
>aloha
> martin
>
>>
>>[Event "1998.10.23"]
>>[Site "Tilburg"]
>>[Date "1998.11.10"]
>>[Round "2"]
>>[White "Anand, Viswanathan"]
>>[WhiteElo "2795"]
>>[Black "Kramnik"]
>>[BlackElo "2780"]
>>[Result "1-0"]
>>[Annotator "Crafty v19.1"]
>>{annotating for player Kramnik}
>>{using a scoring margin of +1.00 pawns.}
>>{search time limit is 1.00}
>>
>> 1. e4 e5
>> 2. Nf3 Nf6
>> 3. Nxe5 d6
>> 4. Nf3 Nxe4
>> 5. d4 d5
>> 6. Bd3 Nc6
>> 7. O-O Be7
>> 8. Re1 Bg4
>> 9. c3 f5
>> 10. Qb3 O-O
>> 11. Nbd2 Na5
>> 12. Qa4 Nc6
>> 13. Bb5 Nxd2
>> 14. Nxd2 Qd6
>> 15. h3 Bh5
>> 16. Nb3 Bh4
>> 17. Nc5 Bxf2+
>> ({7:+3.33} 17. ... Bxf2+ 18. Kxf2 Nd8 19. Kg1 c6 20. Bd3 b6 21.
>>Nb3 $18)
>> ({7:+0.15} 17. ... Rfe8 18. Bd2 a6 19. Rxe8+ Rxe8 20. Bxc6 bxc6
>>21. Qxa6 Re2 $10)
>> 18. Kxf2 Qh2
>> ({8:+4.91} 18. ... Qh2 19. Bxc6 bxc6 20. Qxc6 Qd6 21. Qxd6 cxd6
>>22. Ne6 Rfe8 $18)
>> ({8:+3.61} 18. ... Nd8 19. Qc2 Bg6 20. Nd7 a6 21. Nxf8 axb5 22.
>>Nxg6 Qxg6 $18)
>> 19. Bxc6 bxc6
>> 20. Qxc6 f4
>> 21. Qxd5+ Kh8
>> 22. Qxh5 f3
>> 23. Qxf3 Rxf3+
>> 24. Kxf3 Rf8+
>> 25. Ke2 Qxg2+
>> 26. Kd3 Qxh3+
>> 27. Kc2 Qg2+
>> 28. Bd2 Qg6+
>> 29. Re4 h5
>> 30. Re1 Re8
>> 31. Kc1 Rxe4
>> 32. Nxe4 h4
>> 33. Ng5 Qh5
>> 34. Re3 Kg8
>> 35. c4
>> 1-0
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