Author: Chessfun
Date: 11:00:25 02/24/04
Go up one level in this thread
On February 23, 2004 at 17:48:33, John Merlino wrote:
>I have been in an e-mail thread with GM Larry Evans for the past couple of days,
>talking about the game with the position that Michael Byrne originally posted
>here:
>
>http://www.talkchess.com/forums/1/message.html?350488
>
>We have been discussing some other positions that might have arisen from the
>game. Here's how the game originally went:
>
>[Event "New York"]
>[Site "New York"]
>[Date "1947.??.??"]
>[Round "?"]
>[White "Evans, L."]
>[Black "Pilnick, C."]
>[Result "1-0"]
>[ECO "C13"]
>[PlyCount "57"]
>[EventDate "1947.??.??"]
>
>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8.
>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3
>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21.
>Bd3 Be8 22. Nf3 bxa3 23. Qxe6+ Bf7 24. Bxg6 axb2 25. Bxh7+ Kh8 26. Qh6 Qa1+ 27.
>Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0
>
>It's a marvelous game to play through and play around with.
>
>22.Nf3 is a stunner, and I'm pretty sure that no engine will find it in a
>reasonable amount of time. Can somebody show otherwise? Here's the position:
>
>[D]2r1brk1/p3b2p/2n1p1p1/q2pP3/1p1P1PQ1/P1NB2R1/1P4P1/1K1R2N1 w - - 0 22
>
>Secondly, in Evans' own commentary on the game, he states that after 22.Nf3,
>22...Rf5 does not work as a defense because of 23.Bxf5 exf5 24.Qxf5. However, I
>think that I have found a way that 22...Rf5 DOES work. 23.Bxf5 bxc3! 24.Bxe6+
>Kh8 25.Bxc8 Qb5!
>
>Could somebody check that line out with some other engines to tell me if this is
>truly a way for Black to hold a draw (or even win), or is there a refutation?
>Here's the position at the end of the line:
I think it holds the draw by force. I originally looked at this position last
week when I commented on the Nf3 move.
Evans,L - Pilnick,C
2r1b1k1/p3b2p/2n1p1p1/q2pPr2/1p1P1PQ1/P1NB1NR1/1P4P1/1K1R4 w - - 0 1
Analysis by Shredder 8:
23.Bxf5 bxc3 24.Bxe6+ Kh8 25.Bxc8 Qb5 26.Rd2 Qf1+ 27.Ka2 Qc4+ 28.Kb1 Qf1+ 29.Ka2
Qc4+ 30.Kb1 Qf1+ 31.Ka2
= (-0.06) Depth: 15/50 00:02:28 55208kN
>[D]2B1b2k/p3b2p/2n3p1/1q1pP3/3P1PQ1/P1p2NR1/1P4P1/1K1R4 w - - 0 26
>
>Finally, after 22.Nf3, most engines will play 22...bxc3, which certainly seems
>reasonable enough for a patzer like me. It appears that White can go on with his
>plan with 23.Qxe6+ Bf7 24.Bxg6 Qb6! {a possible refutation that Evans found with
>Fritz} 25.b4 Bxe6 26.Bxh7+ Kh8 27.Rh1 Bh4! {a move that CM9000_SKR found}, which
>results in this position:
Again I also played over this line last week Shredder finds both Qb6 and Bh4.
Bh4 in only 20 seconds.
It was at that point I started examining the resulting position from 28. Bd3
followed by ....c2+ see other post.
>[D]2r2r1k/p3b2B/1qn1b3/3pP3/1P1P1P2/P1p2NR1/6P1/1K5R b - - 0 27
>
>At this point, it looks like White had better play pretty carefully. CM's eval
>is about +1.5 for White, but the eval drops with each new depth. Is this
>position really won for White?
I don't think it is, again see other post.
>Many thanks from myself and GM Evans to all of you who will spend a few CPU
>cycles on these positions. Larry is going to mention this game and this message
>board in an upcoming Chess Life Q&A column, so here's a chance for some of you
>to maybe be famous. :-)
It is a great game to go over. Nf3 is great and as you wrote I doubt any program
will select it.
Sarah.
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.