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Subject: Re: Comet Analysis under SCID

Author: Steve Coladonato

Date: 04:12:41 06/12/02

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<snip>

[D] r3kbnr/1p1b1ppp/p3p3/3pP3/3q4/2NB4/PP3PPP/R1BQ1R1K b kq - 0 11

>>>
>>> Crafty-18.13
>>> Depth:       11      Nodes: 38180437 (122495 n/s)
>>> Score:    -0.90      Time:    311.69 seconds
>>> 11. ... Be7 12. f4 Nh6 13. Qe2 O-O 14. Be3 Qb4 15. Rac1 d4 16. a3 Qc5
>>>
>>> 3 -1.27  11. ... Qxe5 12. Re1 Qf6 (0.04)
>>> 4 -0.87  11. ... Qxe5 12. Re1 Qd4 13. Qe2 (0.05)
>>> 4 -0.87  11. ... Qxe5 12. Re1 Qd4 13. Qe2 (0.16)
>>> 5 -1.01  11. ... Qxe5 12. Re1 Qd6 13. Bg5 Nf6 (0.18)
>>> 5 -1.01  11. ... Qxe5 12. Re1 Qd6 13. Bg5 Nf6 (0.37)
>>> 6 -0.85  11. ... Qxe5 12. Re1 Qd6 13. Bd2 Nf6 14. Rc1 (0.46)
>>> 6 -1.02  11. ... Bb4 12. Qe2 Bxc3 13. bxc3 Qxc3 14. Bd2 Qc5 (1.36)
>>> 6 -1.02  11. ... Bb4 12. Qe2 Bxc3 13. bxc3 Qxc3 14. Bd2 Qc5 (1.56)
>>> 7 -0.88  11. ... Bb4 12. f4 Bxc3 13. bxc3 Qxc3 14. Rb1 b5 15. Be3 (3.77)
>>> 7 -0.97  11. ... Nh6 12. f4 Rc8 13. Ne2 Qc5 14. Bd2 Nf5 (6.74)
>>> 7 -0.97  11. ... Nh6 12. f4 Rc8 13. Ne2 Qc5 14. Bd2 Nf5 (7.44)
>>> 8 -0.92  11. ... Nh6 12. Bxh6 gxh6 13. f4 Rc8 14. Qc2 Ba3 15. bxa3 Rxc3 (10.86)
>>> 8 -1.02  11. ... Bb4 12. Rb1 Qxe5 13. Re1 Qd6 14. Qg4 Qc5 15. Qe2 (21.43)
>>> 8 -1.02  11. ... Bb4 12. Rb1 Qxe5 13. Re1 Qd6 14. Qg4 Qc5 15. Qe2 (23.35)
>>> 9 -0.71  11. ... Bb4 12. Ne2 Qxe5 13. Qb3 Qd6 14. a3 Bc5 15. Qxb7 Bc6 (45.39)
>>> 9 -0.92  11. ... Nh6 12. Be3 Qxe5 13. Re1 Qd6 14. Rc1 d4 15. Ne4 Qe5 (62.49)
>>> 9 -0.93  11. ... Rc8 12. f4 Nh6 13. Ne2 Qc5 14. b4 Qc7 15. Qd2 Nf5 (71.48)
>>> 9 -0.93  11. ... Rc8 12. f4 Nh6 13. Ne2 Qc5 14. b4 Qc7 15. Qd2 Nf5 (73.37)
>>> 10 -0.78  11. ... Rc8 12. f4 Nh6 13. Ne2 Qc5 14. b4 Qxb4 15. Rb1 Qa5 16. Rxb7
>>>Qxa2 (83.49)
>>> 10 -0.84  11. ... Be7 12. f4 Nh6 13. Re1 Qf2 14. Re2 Qh4 15. g3 Qg4 16. Rd2
>>>Qxd1+ 17. Rxd1 (145.50)
>>> 10 -0.84  11. ... Be7 12. f4 Nh6 13. Re1 Qf2 14. Re2 Qh4 15. g3 Qg4 16. Rd2
>>>Qxd1+ 17. Rxd1 (178.45)
>>> 11 -0.90  11. ... Be7 12. f4 Nh6 13. Qe2 O-O 14. Be3 Qb4 15. Rac1 d4 16. a3 Qc5
>>>(244.93)
>>> 11 -0.90  11. ... Be7 12. f4 Nh6 13. Qe2 O-O 14. Be3 Qb4 15. Rac1 d4 16. a3 Qc5
>>>(311.69)
>>>
>>>COMET-B46
>>>Depth:       11      Nodes: 44858323 (1274 n/s)
>>
>>The n/s looks peculiar. So, it took 10 hrs to reach this depth ?
>>
>>The B.46 CB natives reaches depth 11 in a few minutes on Athlon/700.
>>The evaluation looks quite different too.
>>
>>I guess that there is something wrong with the comet-xb.
>>
>>Sorry, it seems i was too optimistic to try this release without testing.
>>
>>Uli
>>
>>
>>>Score:    -1.32      Time:  35187.00 seconds
>>>d4e5!  f1e1  e5d6  d1b3  d7c6  h1g1  g8f6  d3h7
>>>
>>> 6 -0.91  f8b4?  f2f4  b4c3  b2c3  d4c3  a1b1  b7b6  b1b6  c3e5 (137.00)
>>> 6 -0.84  f8b4  f2f4  b4c3  b2c3  d4c3  a1b1  b7b5  c1b2 (287.00)
>>> 6 -0.84  f8b4  f2f4  b4c3  b2c3  d4c3  a1b1  b7b5  c1b2 (325.00)
>>> 7 -0.84  f8b4  f2f4  b4c3  b2c3  d4c3 (437.00)
>>> 7 -0.97  d4e5!  f1e1  e5d6  d1b3  d7c6  c3a4  g8e7  d3a6 (487.00)
>>> 7 -1.13  d4e5  f1e1  e5d6  d1b3  d7c6  c1g5  f8e7 (525.00)
>>> 7 -1.13  d4e5  f1e1  e5d6  d1b3  d7c6  c1g5  f8e7 (625.00)
>>> 8 -0.99  d4e5?  f1e1  e5d6  d1b3  d6h2  h1h2  f8d6  f2f4  g8f6 (650.00)
>>> 8 -0.95  d4e5  f1e1  e5d6  d1b3  d7c6  h1g1 (1512.00)
>>> 8 -0.95  d4e5  f1e1  e5d6  d1b3  d7c6  h1g1 (1725.00)
>>> 9 -1.08  d4e5!  f1e1  e5d6  d1b3  d7c6  e1e6  f7e6  c3d5 (2387.00)
>>> 9 -1.35  d4e5!  f1e1  e5d6  d1b3  d7c6  e1e6  f7e6  c3d5 (3587.00)
>>> 9 -1.35  d4e5?  f1e1  e5d6  d1f3  g8f6  c1f4  d6b4  f4e5  f8e7  a1c1 (3725.00)
>>> 9 -1.35  d4e5  f1e1  e5d6  d1f3  g8f6  c1f4  d6b4  f4e5  f8e7  a1c1 (4212.00)
>>> 10 -1.21  d4e5?  f1e1  e5d6  d1b3  d7c6 (4575.00)
>>> 10 -1.19  d4e5  f1e1  e5d6  d1b3  d7c6  h1g1  g8f6  c1g5  h7h6  g5h4 (9975.00)
>>> 10 -1.19  d4e5  f1e1  e5d6  d1b3  d7c6  h1g1  g8f6  c1g5  h7h6  g5h4 (11112.00)
>>> 11 -1.32  d4e5!  f1e1  e5d6  d1b3  d7c6  h1g1  g8f6  d3h7 (35187.00)
>
>This illustrates one of the problems with chess engines.  d4e5 would be "really
>asking for it" in human-human games, assuming that the person playing White was
>well versed in this opening.  Chess engines "know no fear."  They "go where wise
>men fear to trod."  A person who used their chess engine as a tutor in opening
>theory would be making a huge mistake!
>
>Can be generalized to gambits in general.
>
>Bob D.

In the main line of the Milner-Barry Gambit, I would agree with you.  However,
in this particular case, with a black pawn on a6, taking the second pawn on e5
should be relatively safe as the a6 pawn keeps the c3 knight out of b5 where in
the main line of the Gambit, the knight intrudes on that square with a strong
attack.

Steve



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