LCZero update (2)

[George Tsavdaris]

Yet, a (somewhat serious) bug was discovered yesterday and major changes are under way, which when combined with the engine improvements that are about to be released, will make a huge jump in strenght in the days to come... we'll see how things develop.

Can you elaborate more on that? About the bug and about the changes. Is there a place where you (will) announce all these(the changes , the bug correction etc)?

Also is every major bug fix and major changes in the code mean the current training and values of NN are pointless or they continue to be absolutely usable?

[nabildanial]

LC0 latest net (ID 82) just made +150 elo jump from previous best net. Combining with FPU reduction patch ('next' branch), LC0 is now in the 2300 Elo region.

[BrendanJNorman]

LC0 latest net (ID 82) just made +150 elo jump from previous best net. Combining with FPU reduction patch ('next' branch), LC0 is now in the 2300 Elo region.

LZ definitely getting stronger since my first games with him.


[pgn]

[Event "?"]
[Site "?"]
[Date "2018.04.03"]
[Round "?"]
[White "Norman, Brendan"]
[Black "LCZero ID 82"]
[Result "1-0"]
[ECO "D91"]
[Annotator ",M"]
[PlyCount "121"]
[EventDate "2018.04.04"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 g6 5. Bg5 Bg7 6. Bxf6 exf6 7. cxd5 cxd5 8.
e3 O-O 9. Be2 Nc6 10. O-O f5 11. Rc1 Be6 12. g3 Re8 13. Re1 Rc8 14. Bf1 a6 15.
Bg2 h6 16. Qd2 Na5 17. b3 Nc6 18. Na4 g5 19. Nc5 b6 20. Nd3 Ne7 21. h4 g4 22.
Nh2 Bf6 23. Nf4 Ng6 24. Nh5 Be7 25. Nf1 a5 26. Rxc8 Qxc8 27. Rc1 Qd7 28. Qd3
Rc8 29. Rc2 Rxc2 30. Qxc2 Kh8 31. Nd2 Bb4 32. Nb1 Ne7 33. a3 Bd6 34. Nf6 Qd8
35. a4 Kg7 36. Nh5+ Kg6 37. Nf4+ Kf6 38. Nc3 Bb4 39. Nb5 Kg7 40. Qc7 Qc8 41.
Qxc8 Bxc8 42. Nc7 Bb7 43. Ncxd5 Nxd5 44. Bxd5 Bc8 45. Bc4 Bb7 46. Kf1 Bf3 47.
Bd5 Bd6 48. Bxf3 Bxf4 49. gxf4 gxf3 50. h5 Kf6 51. Kg1 Ke6 52. Kh2 Kd5 53. Kh3
Ke4 54. Kg3 f6 55. Kh4 Kd5 56. Kh3 Ke4 57. Kg3 Kd3 58. Kxf3 Kc3 59. d5 Kxb3 60.
d6 Kxa4 61. d7 1-0



[/pgn]

Previous games were just tactical smashes, but this one was a bit more strategical in nature.

Had to work a bit more.

Looking forward to seeing LZ improve more.

[Nay Lin Tun]

It took me about 30 mins to carefully check all lines while Leela play instant move or 200ms/move Play.lczero.org , network ID 82, . As usual strat vs computers, " Block and Squeeze"

[pgn]1. Nf3 Nf6 2. g3 d5 3. Bg2 g6 4. d4 Bg7 5. O-O O-O 6. e3 h6 7. Nbd2 Nc6 8. c4 e6 9. a3 a5 10. b3 a4 11. b4 Ne7 12. Bb2 Nf5 13. Rc1 c6 14. c5 Bd7 15. Qc2 h5 16. Bc3 Re8 17. Rb1 Rc8 18. Qxa4 Ra8 19. Qb3 Rc8 20. a4 Ra8 21. b5 cxb5 22. axb5 Rf8 23. Ra1 Rc8 24. Ra7 Rb8 25. Rfa1 Qe8 26. Bf1 Ng4 27. h3 Ngxe3 28. fxe3 Nxe3 29. Bd3 Nf5 30. Bxf5 gxf5 31. Rb1 f6 32. Kh2 h4 33. Nxh4 f4 34. gxf4 Qh5 35. Ng2 Rf7 36. Qd1 Qg6 37. Nf3 Bh6 38. Nfh4 Qe4 39. Qf1 Rg7 40. Re1 Qc2 41. Re3 Kh7 42. Qd3+ Qxd3 43. Rxd3 Bxb5 44. Rg3 Bc6 45. Rxg7+ Bxg7 46. Ne3 f5 47. Nf3 Kg6 48. Ne5+ Bxe5 49. fxe5 f4 50. Ng4 Kf5 51. Nf6 Rd8 52. h4 Rh8 53. h5 Kg5 54. Kg2 Kf5 55. Kf3 Kg5 56. Bd2 Kf5 57. Bxf4 Rf8 58. h6 Rh8 59. h7 Kg6 60. Ra1 Kg7 61. Rg1+ Kf7 62. Kg4 Bb5 63. Kh5 Bd3 64. Kh6 Rxh7+ 65. Nxh7 Ba6 66. Nf6 Kf8 67. Rg7 b5 68. cxb6 Bb7 69. Rc7 Ba6 70. Kh5 Be2+ 71. Kh4 Ba6 72. Bh6#[/pgn]

[Nay Lin Tun]

NM Jerry, aka Chess Network's interest in LC0

https://www.youtube.com/watch?v=6CLXNZ_QFHI

[AlvaroBegue]

Also agadmator: https://www.youtube.com/watch?v=n8ZzqHhGjtc

[Nay Lin Tun]

https://ibb.co/kFx4Px

700+ volunteers now.

[JJJ]

Problem is LCzero doesn't win elo anymore.

[Dann Corbit]

Problem is LCzero doesn't win elo anymore.

You can always make a bigger net.

Maybe it is time.

[Henk]

If you create a bigger net tuning has to start from scratch or not. Can you reuse the weights ?