Author: George Sobala
Date: 00:24:25 10/20/03
Go up one level in this thread
On October 19, 2003 at 23:45:01, Telmo Escobar wrote:
> Somebody asked about a "Colle" personality for Deep Sjeng. I tried to create
>one. The engine plays an extremely sharp and lively kind of chess. An example:
>
>
>[Event "Computer chess game"]
>[Site "Athlon-1200"]
>[Date "2003.10.20"]
>[Round "-"]
>[White "Amy 0.8.4"]
>[Black "Deep Sjeng 1.5(Colle)"]
>[Result "0-1"]
>[TimeControl "300"]
>
>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 Nc6 8.
>Nxc6 bxc6 9. O-O Be7 10. Bg5 Qa5 11. Bxf6 gxf6 12. Qf3 Qe5 13. Qg4 Qg5 14.
>Qe2 Rg8 15. g3 Qh4 16. Qe3 c5 17. Ba4+ Kf8 18. Bc6 Rb8 19. Rab1 Rb6 20. Ba4
>Bb7 21. Qe2 f5 22. exf5 Qh3 23. f3 Qxf5 24. Nd1 Rg6 25. Ne3 Qh5 26. Nc4 Rb4
>27. Bb3 d5 28. Ne5 Rg5 29. Rfe1 Rh4 30. Qg2 c4 31. Ba4 Rh3 32. b4 d4 33.
>Bc6 Bxc6 34. Nxc6 Bd6 35. f4 Bxf4 36. Nxd4 Bxg3 37. Qa8+ Kg7 38. Nf3 Bxh2+
>39. Kf2 Bg3+ 40. Ke2 Bf4 41. Rb3 Rh2+ 42. Kd1 cxb3 43. Re2 Rg1+ 44. Nxg1 b2
>45. Qf8+ Kxf8 46. Nf3 b1=Q#
>{Black Mates} 0-1
>
> The following is a defeat:
>
>[Event "Computer chess game"]
>[Site "Athlon-1200"]
>[Date "2003.10.20"]
>[Round "-"]
>[White "Deep Sjeng 1.5(Colle)"]
>[Black "Pharaon 2.62"]
>[Result "0-1"]
>[TimeControl "300"]
>
>1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. Be2 O-O 8.
>O-O b6 9. b3 Bb7 10. Bb2 Qe7 11. Rad1 dxc4 12. bxc4 Rad8 13. Ng5 h6 14.
>Nge4 Nxe4 15. Nxe4 Bc7 16. c5 f5 17. Ng3 bxc5 18. dxc5 Nxc5 19. Ba3 Bb6 20.
>Rxd8 Rxd8 21. Bf3 g5 22. Qc4 Kf8 23. Rc1 g4 24. Be2 Rd2 25. Qc3 Rxa2 26.
>Bxc5 Bxc5 27. Qh8+ Kf7 28. Bc4 Rd2 29. Nh5 Bd6 30. Qxh6 Bxh2+ 31. Kf1 Be5
>32. Ke1 Rd6 33. f4 gxf3 34. Kf1 fxg2+ 35. Kxg2 c5+ 36. Kg1 Bf3 37. Rb1 Rb6
>38. Rxb6 axb6 39. Bb3 b5 40. Kf2 Be4 41. Nf4 Bxf4 42. Qxf4 Qd8 43. Ke1 Qa5+
>44. Ke2 c4 45. Qd6 cxb3 46. Qd7+ Kf6 47. Qd4+ Kg6 48. Qd6 Qa2+ 49. Ke1 b2
>50. Qg3+ Kf6 51. Qh4+ Ke5 52. Qh2+ Kd5 53. Qd2+ Kc6 54. Qc3+ Kb7 55. Qb4
>b1=R+ 56. Qxb1 Qxb1+ 57. Kf2 Qd1 58. Kg3 Qf3+ 59. Kh2 Qg2#
>{Black mates} 0-1
>
> The following is my file Colle.per
>
> (cut here)
>------------------------------------------------------------------
>extra tactics=true # true, false
>limit extensions=false # true, false
>nullmove=dynamic # disabled, aggressive, conservative, mixed,
>dynamic
>tactical search=always # never, sometimes, always
>selectivity=3 # 0 <--> 4
>forward pruning=true # true, false
>futility pruning=true # true, false
>singular extensions=true # true, false
>lazy evaluation=true # true, false
>style=offensive # balanced, offensive, defensive
>strength=100 # 100 = strongest, 0=weakest
>maximum depth=60 # 60 = max, 2=min, lower = weaker
>pawnstructure=80 # 0 <--> 400
>passed pawns=100 # 0 <--> 400
>kingsafety=150 # 0 <--> 400
>piece placement=100 # 0 <--> 400
>pawn=100 # 0 <--> 400
>knight=110 # 0 <--> 400
>bishop=110 # 0 <--> 400
>rook=100 # 0 <--> 400
>queen=120 # 0 <--> 400
>mobility=200 # 0 <--> 400
>bishop pair=150 # 0 <--> 400
>attraction=300 # 0 <--> 400, 'attracts' attacking pieces to king
>--------------------------------------------------------------------------
>(cut here)
>
> If entertaining, the Colle personality probably needs some fine tuning: for
>instance, "attraction" may be too high, making the engine playing too much for
>the attack. Also "mobility" could be a bit lower.
>
> Try it.
>
>
> Telmo
Looking at the file, this looks like a toned down version of the (insane)
redshift personality, and I would guess would play rather stronger. A sort of
halfway house between redshift and the default. Probably a better choice for
long games against humans, redshift seems strong enough for most at blitz
settings! I wouldn't hold out too much hope of it beating other chess engines
though, they can see usually see right through the sacrifices.
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