Author: Miguel A. Ballicora
Date: 20:30:38 05/19/01
Go up one level in this thread
On May 19, 2001 at 10:15:06, Vine Smith wrote:
>On May 19, 2001 at 08:52:03, Sune Larsson wrote:
>
>>On May 19, 2001 at 06:22:23, Vine Smith wrote:
>>
>>>On May 19, 2001 at 05:26:07, Jeroen Noomen wrote:
>>>
>>>>Fritz - Gambit Tiger Leiden round 4
>>>>-------------------------------------
>>>>1. d4 d5 2. c4 dxc4 3. e4 Nc6 4. Be3 Nf6 5. Nc3 e5 6. d5 Na5 7. Nf3 Bd6
>>>>8. Qa4+ Bd7 9. Qxa5 a6 10. Na4 Qe7 11. a3 Nxe4 12. Bxc4 b5 13. Bd3 Nf6
>>>>14. Nc3 e4 15. Nxe4 Nxe4 16. O-O O-O 17. Rfe1 f5 18. h3 Qf7 19. Rad1 Rfe8
>>>>20. Bc2 g6 21. b4 Nc3 22. Rd3 Qg7 23. Bd1 Ne4 24. Bd4 Qf7 25. Rde3 g5
>>>>26. Bc2 g4 27. hxg4 fxg4 28. Bxe4 gxf3 29. Bxf3 Qf4 30. Bc5 Qh2+ 31. Kf1
>>>>Bf4 32. Rxe8+ Bxe8 33. Be3 Bd6 34. Ke2 Bh5 35. Rd1 Qe5 36. Rd4 Bxf3+
>>>>37. gxf3 Qf5 38. Rd3 h5 39. a4 h4 40. axb5 h3 41. Qa1 h2 42. b6 cxb6
>>>>43. Qh1 Rc8 44. f4 Qh5+ 45. Kf1 Rc2 46. Bd2 Bxf4 47. d6 Rxd2 48. Rxd2 Bxd2
>>>>49. d7 Qd1+ 50. Kg2 Qxh1+ 0-1
>>>
>>>Astonishing positional suicide -- few, if any, humans would ever play 21.b4,
>>>entombing the queen. Of course, Tiger could afford to open the game in any way
>>>it pleased after that. It would be interesting to see if the lack of interest in
>>>liberating the queen is duplicated by many programs; correct or not, I would
>>>have been so concerned about this offside post that I would have played 17.Qe1
>>>immediately.
>>
>>
>> The terms "mobility" and "king safety" comes to mind after this kamikaze...
>>
>> Anyway, I made a quick check on PIII 800 with 128 Mb hash. 4 min ponder.
>>
>> Fritz 5.32 21.b3 and later plays b3-b4.
>> Fritz 6 Old 21.b3
>> Fritz 6 (Newest) 21.b4
>> Deep Fritz 21.b4
>> Hiarcs 7.32 21.b4
>>
>> Then we have some non closers:
>>
>> Crafty 18.08 21.Bc1
>> Shredder 5 21.h4
>> Gandalf 4.32h 21.Kf1 or 21.Re2 (shifting after 4.02)
>>
>> Sune
>
>Horrible that not only Fritz, but also Deep Fritz (this program is going to play
>Kramnik???) and Hiarcs (with something of a good reputation for positional play,
>I thought) commit this blunder. Also, any program that doesn't evaluate the
>resulting position at something like -2.00 or lower has nothing to be proud of.
>I'm putting together a suite of positional problems to evaluate programs'
>understanding or lack thereof, and I'll have to include this position as an
>"avoid move" type of problem (even though it's a little unfair to Fritz, which
>will of course fail this one).
>Can you tell if Gandalf wants to play 21.Re2 in order to follow up with 22.Qe1?
>If so, that would mark it as the only program so far to demonstrate some concern
>about the queen's situation.
>
>Regards,
>Vine
This is the position
[D]r3r1k1/2pb1q1p/p2b2p1/Qp1P1p2/4n3/P3BN1P/1PB2PP1/3RR1K1 w - - 0 21
My humble "Gaviota" never considers b4 and tries to free the queen.
It has a special code for that, since I really needed it because it does
not have opening book (yet). It avoids the queen going for a risky ride
too early. It backfires, sometimes, when sacrifices pawns
and try to hunt the opponent queen without success. Someday this will need
a tune-up or make it asimetric. So far, I gave me more happiness than
headaches but it is not perfect.
This is in an AMD K6-2 400 mhz
7: 6.7 -0.08 Bc2xe4 f5xe4 Nf3-g5 Qf7-f6 Qa5-d2 h7-h6
Ng5-e6 Bd7xe6 d5xe6 Re8xe6 Be3xh6
8 9.1 -0.08 Bc2xe4 f5xe4 Nf3-g5 Qf7-f6 Qa5-d2 h7-h6
Ng5-e6 Bd7xe6 d5xe6
8: 12.2 -0.08 Bc2xe4 f5xe4 Nf3-g5 Qf7-f6 Qa5-d2 h7-h6
Ng5-e6 Bd7xe6 d5xe6
9 15.1 -0.08 Bc2xe4 f5xe4 Nf3-g5 Qf7-f6 Qa5-d2 h7-h6
Ng5-e6 Bd7xe6 d5xe6 Re8xe6
9: 37.4 -0.08 Bc2xe4 f5xe4 Nf3-g5 Qf7-f6 Qa5-d2 h7-h6
Ng5-e6 Bd7xe6 d5xe6 Re8xe6
10 49.8 -0.38 Bc2xe4 f5xe4 Nf3-g5 Qf7-f6 Qa5-c3 Qf6xc3
b2xc3 h7-h6 Ng5-e6 Bd7xe6 d5xe6 Re8xe6
Be3xh6 Bd6xa3
10 249.8 -0.16 Re1-e2 b5-b4 a3xb4 Bd7-b5 Re2-e1 Ra8-b8
Nf3-g5 Ne4xg5 Be3xg5 Bb5-c4 Qa5-a1 Bd6xb4
Re1xe8 Rb8xe8
10: 354.6 -0.16 Re1-e2 b5-b4 a3xb4 Bd7-b5 Re2-e1 Ra8-b8
Nf3-g5 Ne4xg5 Be3xg5 Bb5-c4 Qa5-a1 Bd6xb4
Re1xe8 Rb8xe8
11 782.6 -0.06 Re1-e2 Ne4-f6 Qa5-e1 f5-f4 Be3-d4 Re8xe2
Qe1xe2 Ra8-e8 Bd4-e5 a6-a5 Kg1-h2 Nf6xd5
11: 1135.1 -0.06 Re1-e2 Ne4-f6 Qa5-e1 f5-f4 Be3-d4 Re8xe2
Qe1xe2 Ra8-e8 Bd4-e5 a6-a5 Kg1-h2 Nf6xd5
After b4 is played, this is the analysis from the black's point of view:
7: 8.3 +1.79 Ne4-c3 Rd1-d3 Qf7-g7 Nf3-d4 Nc3-e4 Nd4-c6
Ne4-c3
8 10.2 +1.78 Ne4-c3 Rd1-d3 Qf7-f6 Nf3-d4 Nc3xd5 Bc2-b3
c7-c6 Nd4xc6 -----
8: 15.3 +1.78 Ne4-c3 Rd1-d3 Qf7-f6 Nf3-d4 Nc3xd5 Bc2-b3
c7-c6 Nd4xc6 -----
9 22.9 +1.64 Ne4-c3 Rd1-d3 Qf7-f6 Nf3-d4 Nc3-a2 Nd4-e2
f5-f4 Be3-d4 Qf6-f7
9: 70.7 +1.64 Ne4-c3 Rd1-d3 Qf7-f6 Nf3-d4 Nc3-a2 Nd4-e2
f5-f4 Be3-d4 Qf6-f7
10 105.0 +1.63 Ne4-c3 Rd1-d3 Qf7-f6 Nf3-d4 Nc3-e4 Nd4-c6
h7-h6 Be3-d4 Qf6-f7 Bd4-b2 Bd7xc6 d5xc6
It really dislikes the queen trapped.
Regards,
Miguel
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