Author: John Merlino
Date: 09:45:46 04/02/04
Go up one level in this thread
On April 01, 2004 at 23:21:25, Dan Ellwein wrote:
>On April 01, 2004 at 23:03:51, Uri Blass wrote:
>
>>On April 01, 2004 at 22:51:44, Dan Ellwein wrote:
>>
>>>On April 01, 2004 at 20:10:21, Uri Blass wrote:
>>>
>>>>This is from my correspondence game
>>>>
>>>>How much time does your program need to avoid Qxb2(I played Qc4 and won against
>>>>vladimir turkov)
>>>>
>>>>I decided based on analysis that Qc4 is better but I believe that programs can
>>>>avoid Qxb2 after many hours of analysis(I found that white has probably a draw
>>>>after Qxb2 when Qc4 gives black the better position)
>>>>
>>>>[D]3r1rk1/pp2b1pp/1n3p2/4p3/7Q/2P1B1N1/PP2qPPP/R4RK1 b - - 0 18
>>>>
>>>>
>>>>Here is the game
>>>>
>>>>[Event "40'/40"]
>>>>[Site "Tel-Aviv"]
>>>>[Date "2004.03.29"]
>>>>[Round "?"]
>>>>[White "New game"]
>>>>[Black "Yace Paderborn"]
>>>>[Result "*"]
>>>>[ECO "B22"]
>>>>[Annotator "Blass,Uri"]
>>>>[PlyCount "78"]
>>>>[TimeControl "40/2400:0/0:0/0"]
>>>>
>>>>{64MB, Shredder7.ctg, URI-PC
>>>>} 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3
>>>>Nc6 6. Bc4 Nb6 7. Bb3 d5 8. exd6 Qxd6 9. O-O Be6 10. Bxe6 Qxe6 11. Nxd4 Nxd4
>>>>12. Qxd4 Rd8 13. Qh4 Qe2 14. Nd2 e5 15. Ne4 Be7 16. Bg5 f6 17. Be3 O-O 18. Ng3
>>>>Qc4 19. Qh3 g6 20. Rfe1 Rd3 21. Bxb6 axb6 22. Qh6 Rfd8 23. Qc1 b5 24. Re4 Qc7
>>>>25. Nf1 f5 26. Re2 e4 27. a3 Kg7 28. Qe1 Qc4 29. Rc2 Bg5 30. Qe2 h5 31. Re1 Qb3
>>>>32. g3 h4 33. Rb1 hxg3 34. fxg3 Rf3 35. g4 Qd5 36. c4 Qd4+ 37. Kh1 fxg4 38.
>>>>cxb5 e3 39. Ng3 Rf2 *
>>>>
>>>>Uri
>>>
>>>hi Uri
>>>
>>>nice game...
>>>
>>>after 17 minutes, CM9 personality OffSet stays with ...Qxb2
>>>
>>>Time Depth Score Positions Moves
>>>---- ---- ---- ---- ----
>>>0:00 1/3 -1.84 1863 1...Qxb2 2.Nf5 Rf7 3.c4
>>>0:00 1/4 -2.12 4381 1...Qxb2 2.Nf5 Ba3 3.Qg4 Rf7
>>>0:00 1/5 -1.86 16068 1...Qxb2 2.Nf5 Rf7 3.Bxb6 Qxb6
>>> 4.Rfe1
>>>0:00 1/6 -2.10 58763 1...Qxb2 2.Nf5 Ba3 3.Qg4 g6 4.Bxb6
>>> axb6
>>>0:02 1/7 -2.04 217581 1...Qxb2 2.c4 Ba3 3.Qg4 Qc2 4.Nf5
>>> g6
>>>0:06 1/8 -2.19 572092 1...Qxb2 2.Qg4 Ba3 3.Nf5 g6 4.Bxb6
>>> Qxb6 5.Rad1 Kh8
>>>0:14 1/9 -2.14 1395620 1...Qxb2 2.Qg4 Ba3 3.Bxb6 Qxb6
>>> 4.Rfb1 Qc6 5.Rb3 Bc5 6.Rab1
>>>0:35 1/10 -2.17 3616925 1...Qxb2 2.Qg4 Ba3 3.c4 g6 4.c5
>>> Nd5 5.Rab1 Qc2 6.Rxb7 Nxe3 7.fxe3
>>> Bxc5
>>>2:20 1/11 -2.18 14186541 1...Qxb2 2.Qe4 Qxc3 3.Rfc1 Qa3
>>> 4.Qxb7 f5 5.Bxb6 axb6 6.Qxb6 Rd2
>>> 7.Qe6+ Kh8 8.Qxe5 Rxa2
>>>6:56 1/12 -2.18 41779354 1...Qxb2 2.Nf5 Ba3 3.c4 g6 4.Nh6+
>>> Kh8 5.Ng4 g5 6.Qh6 Be7 7.Bxb6 Qxb6
>>> 8.Ne3
>>>17:04 1/13 -2.25 106733847 1...Qxb2 2.Qg4 g6 3.Qe6+ Rf7 4.Rfc1
>>> Nd5 5.Rab1 Qa3 6.Rb3 Qd6 7.Qxd6
>>> Bxd6 8.Bxa7 b5
>>>Dan
>>
>>The idea for white agyer Qxb2 is Nf5 Ba3 Bh6 and white has a draw(I could not
>>find more than a draw but I believe that black has better position with Qc4 and
>>I did not want a draw).
>>
>>Uri
>
>at ply 14 the sequence goes as you posted above with a score of -2.35...
>
>Time Depth Score Positions Moves
>
>43:29 2/14 -2.35 280721361 1...Qxb2 2.Nf5 Ba3 3.Qe4 Qxc3 4.Bxb6
> axb6 5.Qxb7 Rf7 6.Qxb6 Rfd7 7.Qe6+
> Kh8 8.Rab1 Bc5 9.Ng3 Qc2 10.Rbe1
And here is what CM_SKR says after many hours:
Time Depth Score Positions Moves
0:00 1/3 -0.64 1354 18...Qxb2 19.Nf5 Nd5 20.Rab1
0:00 1/4 -0.64 3255 18...Qxb2 19.Nf5 Nd5 20.Rab1
0:00 1/5 -0.24 11438 18...Qxb2 19.Nf5 Rf7 20.Rab1 Qc2
21.Qh5
0:00 1/6 -0.27 29203 18...Qxb2 19.Nf5 Rf7 20.Rab1 Qc2
21.Bxb6 axb6
0:00 1/7 -0.50 114483 18...Qxb2 19.Nf5 Rf7 20.Rad1 Rxd1
21.Rxd1 Qe2 22.Nxe7+ Rxe7 23.Rd8+
Kf7
0:01 1/8 -0.54 242106 18...Qxb2 19.Nf5 Rf7 20.Rad1 Rxd1
21.Rxd1 Qe2 22.Nxe7+ Rxe7 23.Rd8+
Kf7 24.h3 h6 25.Bxb6 axb6
0:03 1/9 -0.28 830168 18...Qxb2 19.Nf5 Ba3 20.Rab1 Qxa2
21.Qg4 g6 22.Bxb6 axb6 23.Rxb6
Qc2 24.Ne3
0:10 1/10 -0.27 2738639 18...Qxb2 19.Nf5 Rfe8 20.Rab1 Qxc3
21.Qg3 g6 22.Ng7 Rf8 23.Ne6 Rd3
24.Nxf8 Bxf8
0:39 1/11 -0.53 10575095 18...Qxb2 19.Nf5 Ba3 20.Rab1 Qxa2
21.Qg4 g6 22.Bxb6 axb6 23.Rxb6
Kh8 24.Rxb7 Rf7 25.Rxf7 Qxf7
1:17 1/12 -0.49 21088901 18...Qxb2 19.Nf5 Ba3 20.Rab1 Qe2
21.Rfe1 Qd3 22.Qg4 g6 23.Nh6+ Kg7
24.Rb3 Qa6 25.Nf5+ Kh8 26.Bxb6 axb6
3:24 1/13 -0.40 56934910 18...Qxb2 19.Nf5 Ba3 20.Rab1 Qxa2
21.Qg4 g6 22.Bxb6 axb6 23.Rxb6
Kh8 24.Ne3 Rf7 25.Qf3 Bc5 26.Rxb7
Rxb7 27.Qxb7
12:34 2/14 -0.44 212361625 18...Qxb2 19.Qg4 Ba3 20.Rab1 Qxc3
21.Bxb6 axb6 22.Rxb6 Rf7 23.Ne4
Qc2 24.Nxf6+ Kh8 25.Ne4 Qxa2 26.Rb5
Rf4 27.Qg5
36:11 3/15 -0.36 629727488 18...Qxb2 19.Qg4 Ba3 20.Rab1 Qxc3
21.Bxb6 axb6 22.Rxb6 Rf7 23.Rb3
Qa5 24.Qe6 Qa7 25.Ne4 Be7 26.Rb6 f5
2:06:48 4/16 -0.41 2254397973 18...Qxb2 19.Nf5 Rf7 20.Rad1 Rxd1
21.Rxd1 Qe2 22.Nxe7+ Rxe7 23.Rd8+
Kf7 24.h3 Nc4 25.Bc5 Rc7 26.g4
Qe1+ 27.Kh2 Qb1 28.Qh5+ Qg6 29.Rf8+
Ke6 30.Qxg6 hxg6 31.Re8+ Kd5 32.Bxa7
6:53:54 5/17 -0.33 3280608679 18...Qxb2 19.Nf5 Rf7 20.Rad1 Rxd1
21.Rxd1 Bf8 22.Qg4 Kh8 23.h3 Rd7
24.Rxd7 Nxd7 25.Qd1 Nb6 26.Qd8
Kg8 27.Ne7+ Kf7 28.Nd5 Qb1+ 29.Kh2
jm
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