Author: Howard Exner
Date: 11:31:38 02/18/01
Go up one level in this thread
On February 18, 2001 at 09:39:30, Terry McCracken wrote:
>On February 18, 2001 at 01:22:38, Tanya Deborah wrote:
>
>>
>>
>>
>>Hi to all,
>>
>>This is a beautiful game by the Great Master Leonid Stein.
>>I am interested to know, How many programs can avoid the fatal mistake 21.Qxh1?
>>
>>Deep Fritz can avoid that!!!, Deep Fritz can see that Qxb3 is better than Qxh1.
>> Junior6 and Hiarcs7.32 and Fritz6 can´t avoid that...
>>
>>The position is very interesting, in this kind of position you can see some
>>computer weak points, (the machines sometimes have so much appetite, and can´t
>>see the great atack by White after move 21.
>>
>>Another question? Which program can find 12.Qb3! ???? (with a winning endgame)
>>- because after change Queens, White is much better. I think there are no
>>program that can find this move.
>>
>>Please look this game, and post your results here.
>>
>>I will like to know what think Gambit Tiger, Rebel, Shredder, Crafty, Gandalf
>>and other strong programs.
>>
>>
>>
>>[Event "Moscu, 1966 -Spartakiada"]
>>[Date "1966.02.17"]
>>[Round "?"]
>>[White "Stein, Leonid"]
>>[Black "Birbrager Isaak"]
>>[Result "1-0"]
>>[ECO "B10"]
>>[PlyCount "43"]
>>[EventDate "2001.02.17"]
>>
>>1. e4 c6 2. d3 d5 3. Nd2 dxe4 4. dxe4 Nf6 5. Ngf3 Bg4 6. h3 Bh5 7. e5 Nd5 8. e6
>>f6 9. g4 Bg6 10. Nd4 Nc7 11. c3 Qd5 12. Qb3 12... Qxh1 $4 {A big mistake!,
>>Black should have change Queens. (Dxb3). Now with this Rook sacrifice, White
>>is winning! -(Stein.)} 13. Qxb7 13... Kd8 {
>>A very dramatic and obligatory King move! - Black position is hopeless!} 14.
>>N2f3 Bd3 15. Bf4 $1 {A very fine move!} 15... Qxf1+ 16. Kd2 Qxf2+ 17. Kxd3 {
>>Black is lost
>>} 17... Nxe6 18. Nxe6+ Ke8 19. Qc8+ Kf7 20. Nfg5+ fxg5 21. Nxg5+
>>Kf6 22. Qe6# {A beautiful mate !!} 1-0
>>
>>
>>Three Cheers for the Great Master Leonid Stein !!!!!
>>
>>Tanya Deborah.
>
>Hello, Tanya! Thank You for this Gem!
>
>Fritz6e does find Qxb3 on my computer but only after 37min. and some odd sec.
>after searhing 17 plys deep;
That is still an impressive time. Most programs should see within tournament
time controls that Qxh1 is not a major win of material. Tiger 13 and Century3
see an equal score after Qxh1 under 40/2. After 10 minutes (Athlon 900) they
fail to produce a big minus score (I'll try running it longer later on). Looks
quite deep for computers to resolve that Qxh1 will be a big minus score, thus
the need to drop the move Qxh1 in favour of Qxb3. Still an awkward position for
black to defend but better than the forced loss after Qxh1.
What was Fritz'a eval of Qxh1 before it switched to Qxb3?
Level Fixed Depth which is faster than infinite
>analysis. It can't find it at a 40/2hrs. obviously!:)
>My computer is a bit slow by todays' state of the art hardware.
>I'm using a PIII 500 with 128mbs of ram, 64 for hash.
>Please tell me , at what depth of searh, (ply) Deep Fritz found Qxb3!
>Also could you tell me how many min. and what platform (system + hardware)
>you're using.
>
>Becoming very interested in Deep Fritz, as time goes on!:) It think this
>position will stump many programms. It's a great test position. Thanks Again!
>
>Best Regards,
>Terry
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