Author: Dadi Jonsson
Date: 16:06:27 10/09/02
Go up one level in this thread
On October 09, 2002 at 17:54:07, Chessfun wrote:
>On October 09, 2002 at 16:42:44, Frank Quisinsky wrote:
>
>>Hi,
>>
>>an interview in English language with Ruffian programmer Per-Ola Valfridsson can
>>be found on Arena webpage.
>>
>>Thanks to Per-Ola!
>>
>>Arena by Martin Blume:
>>http://www.playwitharena.com
>>
>>Best
>>Frank
>
>Hi Frank,
> Nice job. However I'm curious about one point, well more than one but
>I'll limit this too one.
>
>from http://www.playwitharena.com/
>
>"18. Interview team:
>About the opening book Ruffian uses: While some people are full of praise,
>others seems to think that your book is more of a handicap than a help for
>Ruffian. Do you do a lot of work on the opening book or do you have a friend who
>works as a "book cooker" (book author)? Has the opening book been created in
>conjunction with the engine or is it a seperate working process?
>
>Per-Ola Valfridsson (Ruffian):
>I haven't spent any time to create an opening book for Ruffian. The opening book
>is automatically generated from a rather small pgn file. It has not been
>customized for Ruffian. I wouldn't mind if someone with interest in opening
>books created a Ruffian book. I have received some offers since Ruffian was
>released."
>
>
>As I posted previously and proved version 1.0.0 when released had modified book
>moves identical to Fritz 7.ctg. The previous version (see games below) openings
>did not contain these moves;
>
>So it would appear that someone did infact customize it prior to Ruffians
>release. Simply check the PGN with Ruffians current book and compare what was
>played to what is now listed.
>
>Also this "small pgn" any idea if it will become available as from what I've
>seen this is no weak book.
>
>Event ""]
>[Site ""]
>[Date ""]
>[Round ""]
>[White "Tiger 15 AMD 1.4"]
>[Black "Ruffian 0.7.6 AMD 1.4"]
>[Result "1-0"]
>[Opening "B66 Sicilian: Richter-Rauzer, Rauzer Attack, 7...a6"]
>
>{Time control = 15 5 Engine book(s): ct.tbk }
>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8.
>O-O-O h6 9. Be3
>Nxd4 10. Bxd4 b5 11. f4 Be7 12. Be2 b4 13. Na4 Nxe4 14. Qe3 Nf6 15. Bf3 Rb8 16.
>Ba7 Bd7
>17. Nb6 Bb5 18. h4 O-O 19. f5 e5 20. Bxb8 Qxb8 21. g4 e4 22. g5 exf3 23. gxf6
>Bxf6 24. Nd5
>Qd8 25. Rhg1 Kh8 26. Qxf3 Bxh4 27. f6 Bxf6 28. Nxf6 Qxf6 29. Qxf6 gxf6 30. Rxd6
>h5 31. Rxf6
>Kh7 32. Rg5 Be2 33. Kd2 Bg4 34. a3 bxa3 35. bxa3 Rd8+ 36. Ke3 Re8+ 37. Kd4 Rd8+
>38. Ke4
>Rd7 39. Rxa6 f5+ 40. Kf4 Rd4+ 41. Ke5 Rc4 42. Rgg6 Rxc2 43. a4 Rc7 44. a5 Be2
>45. Rad6
>Ra7 46. a6 Bc4 47. Rh6+ Kg7 48. Rdg6+ Kf8 49. Kf4 h4 50. Kg5 Bf7 51. Rh8+ Ke7
>52. Rf6 {
>Ruffian resigns} 1-0
>
>[Event ""]
>[Site ""]
>[Date ""]
>[Round ""]
>[White "Ruffian 0.7.6 AMD 1.4"]
>[Black "Tiger 15 AMD 1.4"]
>[Result "0-1"]
>[Opening "A38 English: Symmetrical Variation"]
>
>{Time control = 15 5 Engine book(s): ct.tbk }
>1. c4 c5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O
>Ng4 9. e3
>d6 10. b3 a6 11. Bxc6 bxc6 12. Nxc6 Qd7 13. Nd4 e5 14. Nc2 e4 15. Nxe4 d5 16.
>Qxd5 Qxd5
>17. cxd5 Bf5 18. f3 Bxa1 19. Nxa1 Bxe4 20. fxe4 Rfe8 21. h3 Nh6 22. e5 Nf5 23.
>g4 Ng3
>24. Bb2 Nxf1 25. Kxf1 a5 26. Ke2 Rad8 27. e4 Kf8 28. Nc2 Ke7 29. Ne3 Rb8 30. Nc4
>h5 31. gxh5
>gxh5 32. Bd4 Rec8 33. Kd3 Rg8 34. Nxa5 Rg3+ 35. Kc4 Kd7 36. Nc6 Ra8 37. a4 Rxh3
>38. a5
>h4 39. b4 Rh1 40. e6+ fxe6 41. Ne5+ Ke8 42. d6 Rc1+ 43. Kb3 h3 44. Ng4 Kd7 45.
>Be3 Rb1+
>46. Kc4 Re1 47. Kd3 Kxd6 48. Bd2 Rg8 49. Bf4+ Kc6 50. Nf2 Kb5 51. Nxh3 Rd8+ 52.
>Kc3 Rf1
>53. Kc2 Rh8 54. Ng5 Rxf4 55. Kd2 Rg4 { Ruffian resigns} 0-1
>
>Sarah.
I tried to point out in a previous message (as you probably remember) after
doing some testing with Ruffian that its opening book did not seem to be
optimized at all, and indeed that it was a handicap to Ruffian's play. I must
say that I am not surprised by the answer of Ruffian's author to the question
about how its opening book was generated. I think it's about time we stop
searching for ghosts and accept the words of the author that the opening book
"is automatically generated from a rather small pgn file".
The opening book of Ruffian is quite helpful to the program, of course, but I
stand by my previous statement that we can expect to see a jump in Ruffian's
performance once it gets an optimized opening book. Some small changes that may
have been made to the original book of Ruffian won't make any noticeable
difference.
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