Author: Uri Blass
Date: 06:24:04 08/09/02
Go up one level in this thread
On August 09, 2002 at 08:29:23, Stefan Zipproth wrote:
>>Also against LambChop the score was positive, but LambChop was a tough opponent
>>and here some weaknesses of Aristarch appeared: sometimes it simply neglected a
>>sound developpement of its pieces to good squares. Instead it prematurely tried
>>to attack (for example many useless moves with its queen while LambChop took
>>control of the centre) and then it often lost quickly. This often happened if
>>Aristarch had black or was out of book early. Also it sometimes miss to castle
>>and to connect the rooks early enough.
>>Sorry I haven't saved the games... I played just for fun.
>>Anyway Aristarch has an interesting, active playing style. Congrats to your
>>strong engine!
>
>Thanks you! These are indeed helpful observations - I neglected the opening
>phase, as I thought, the opening book is sufficient. Well, this is obviously
>wrong. If Aristarch comes out of the opening
>
>1) without castling or
>2) without having its pieces developed
>
>this may result in suboptimal play, because it plays as if it had castled and
>had its pieces developed. So I will do something here.
>
>Regards,
>Stefan
I do not think that the opening phase is a problem
relative to other programs.
I tested movei against aristarch
(10 minutes per game on p800) when movei always changed
the first move so aristarch usually found itself
out of book after moves like 1.a4 and
the result was that aristarch won 32-4 and 4 draws.
Note that the endgame is one of the
main weaknesses of movei relative to other programs.
Aristarch lost 2 out of 4 of the games
in the endgame phase
(maybe tablebases could help aristarch in
these games but I used no tablebases)
[Event "Computer chess game"]
[Site "URI-PC"]
[Date "2002.08.06"]
[Round "9"]
[White "movei00_76"]
[Black "Aristarch 4.4"]
[Result "1-0"]
[TimeControl "600"]
1. e3 d5 2. d4 Nf6 3. Nf3 Bf5 4. Bd3 Bxd3 5. Qxd3 Nbd7 6. Nc3 e6 7. Qb5 Rb8
8. Qa4 a6 9. O-O c6 10. Bd2 Bd6 11. Rae1 Ne4 12. Qb3 O-O 13. Rd1 c5 14.
Nxe4 dxe4 15. Ne1 Qg5 16. f4 Qh5 17. Rc1 cxd4 18. exd4 b5 19. Bb4 Bxb4 20.
Qxb4 Nf6 21. Qa3 Rfe8 22. h3 Qf5 23. c3 Nd5 24. g4 Qg6 25. Ng2 Ra8 26. c4
bxc4 27. Rxc4 Rab8 28. Qxa6 Rxb2 29. Rc8 Rb8 30. Rfc1 h5 31. Rxb8 Rxb8 32.
Rc8+ Rxc8 33. Qxc8+ Kh7 34. Qd8 hxg4 35. Qh4+ Qh6 36. Qxg4 f5 37. Qg3 Qf6
38. Qf2 g5 39. fxg5 Qxg5 40. Kh2 f4 41. Qe1 e3 42. Nh4 Qh5 43. Kg2 Nc3 44.
Nf3 Nxa2 45. Qb1+ Qg6+ 46. Ng5+ Kg7 47. Qxg6+ Kxg6 48. Nxe6 Kf5 49. Nc5 Nc1
50. Kf3 e2 51. Kf2 f3 52. h4 Kf4 53. h5 e1=Q+ 54. Kxe1 Ke3 55. h6 Ne2 56.
Nd3 Kxd3 57. Kf2 Nc3 58. Kxf3 Ne4 59. Kf4 Nd6 60. h7 Nf7 61. d5
{Black resigns} 1-0
[Event "Computer chess game"]
[Site "URI-PC"]
[Date "2002.08.07"]
[Round "12"]
[White "Aristarch 4.4"]
[Black "movei00_76"]
[Result "0-1"]
[TimeControl "600"]
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Bxc3+ 5. bxc3 d6 6. Nf3 b6 7. Bd3 Bb7
8. Nd2 Qe7 9. O-O e5 10. Qe2 e4 11. Bc2 Nbd7 12. f3 exf3 13. Nxf3 O-O 14.
Nh4 g6 15. Bb2 d5 16. Bd3 Rae8 17. Rae1 dxc4 18. Bxc4 a5 19. Bb5 c6 20. Bd3
a4 21. e4 c5 22. e5 Nd5 23. Qg4 cxd4 24. cxd4 Qb4 25. Qxd7 Qxb2 26. Nf3 Nf4
27. Rf2 Qc3 28. Be4 Nd3 29. e6 Rxe6 30. Bxd3 Bc6 31. Qc7 Rxe1+ 32. Nxe1
Qxe1+ 33. Bf1 Bd5 34. Qxb6 Qe3 35. Qb2 Kg7 36. Qd2 Qxd2 37. Rxd2 Rb8 38. a3
Rb1 39. Kf2 Ra1 40. Rc2 Rxa3 41. Bc4 Bxc4 42. Rxc4 Ra2+ 43. Kf3 Ra1 44. Ke4
a3 45. Ra4 Kh6 46. Ra7 Kg5 47. Kd5 Ra2 48. g3 Rxh2 49. Rxa3 Kg4 50. Kc4
Rc2+ 51. Rc3 Rf2 52. d5 Rd2 53. Rd3 Rxd3 54. Kxd3 Kf5 55. Kd4 Kf6 56. Kc5
Ke7 57. Kc6 Kd8 58. Kd6 h5 59. Ke5 g5 60. Kf5 f6 61. g4 h4 62. Ke4 Kd7 63.
Kf3 Kd6
{White resigns} 0-1
Uri
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