Symbolic vs KingSlayer

[sje]

The third Symbolic vs KingSlayer 100 game match has completed with Symbolic scoring 32+ 58- 10= (-92 elo), an improvement of nearly 100 elo over the prior match.

Games: https://dl.dropboxusercontent.com/u/316 ... 003.pgn.gz

In the last game of the match, there's big wood ending where Symbolic has three queens and can make a fourth but underpromotes to a rook instead as both lead to mate.
[pgn][Event "XBoard Event"]
[Site "gail"]
[Date "2015-10-03"]
[Round "100"]
[White "Simple 0.0"]
[Black "Symbolic 2015-10-03"]
[Result "0-1"]
[UTC "2015-10-03 21:55:43"]
[FinalFEN "7k/8/8/7P/5q1K/3P1r2/5P2/rq6 w - - 2 54"]
[Termination "White is checkmated"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bc4 Bc5 5. d3 h6 6. O-O O-O 7. Bd2 d6 8. Na4 Bg4 9. Nxc5 dxc5 10. Bc3 Qd6 11. b3 Nd4 12. a4
Bxf3 13. gxf3 a6 14. a5 Nh5 15. Kh1 Qf6 16. Bxd4 cxd4 17. c3 dxc3 18. Rc1 b5 19. axb6 cxb6 20. Rc2 Nf4 21. Bd5 Nxd5 22. exd5
Rfc8 23. Qe2 b5 24. Qe4 b4 25. Rd1 a5 26. h4 a4 27. Rb1 a3 28. Rbc1 Rab8 29. Rd1 Re8 30. Re2 Rbc8 31. Rc1 Qd6 32. h5 f6 33. Rg1
Kh8 34. Qg4 Rg8 35. Qe4 c2 36. Ree1 a2 37. Ra1 f5 38. Qxf5 Qxd5 39. Qe4 Qxb3 40. Kh2 Qa3 41. Qe3 b3 42. Rxg7 c1=Q 43. Rxg8+
Kxg8 44. Qb6 Qf4+ 45. Kg2 Kh8 46. Qg6 b2 47. Re1 b1=Q 48. Rxe5 a1=R 49. Re8+ Qaf8 50. Rxf8+ Rxf8 51. Qxh6+ Qxh6 52. Kh3 Rxf3+
53. Kh4 Qf4# 0-1[/pgn]

[Uri Blass]

Very impressive, well done! +9-0=1 against kingslayer.

Well, no surprise there. Mini-Rodent has king safety, mobility, passers and other pawn structure, King Slayer plays with PST only. Mini-Rodent was announced as 2500+, and I suspect that on that same scale TSCP would be 1700, Fairy-Max 1900, Symbolic 2000, King Slayer 2200. I am not sure PST-only engines could ever get above 2300 Elo. Extreme reductions that make top engines strong probably just backfire if the evaluation is so inaccurate that shallow searches do not give a good prediction for the result of deep searches.

I think that you are wrong here.

I remember that I modified strelka some years ago to be a piece square table program in the past(except bonus for side to move) and it could beat Joker1.1.14 in most games and Joker is near 2300 elo based on the CCRL rating list and I even did not try to optimize the piece square tables.

http://computerchess.org.uk/ccrl/4040/
http://computerchess.org.uk/ccrl/404/

[PK]

I count every line of code except comments and blank lines, so single brackets still count. By this metric, Mini Rodent has 2321 lines of code, and after recent LMR changes it scores about 37% against Fruit 2.1

[Daniel Anulliero]

Is symbolic avalaible for download ?

[sje]

Is symbolic avalaible for download ?

Sorry, no. But see my Google Link post for some of my stuff you can download.