mjlef wrote: ↑Tue Dec 21, 2021 3:27 pm
Chessqueen wrote: ↑Mon Dec 20, 2021 11:27 pm
lkaufman wrote: ↑Mon Dec 20, 2021 5:30 pm
Komodo Dragon 2.6 Released
KomodoChess has released Dragon 2.6 at komodochess.com. It is a significant upgrade from Dragon 2.5.1 (or 2.5). Estimated elo gains from 2.5.1 on one thread in blitz (2' + 1") using a normal opening book in standard mode are 18 elo (based on 20,000 direct games), in Monte Carlo mode 24 elo, and in standard mode playing Fischerandom (chess960) 26 elo (based on about 5500 direct games in those cases). Elo gains for similar tests against Dragon 2 showed +83 Elo for a normal opening book in standard mode, +113 elo in MCTS mode, and a remarkable +126 elo in FRC (standard mode). Compared to the final Komodo version before NNUE (Dragon), Komodo 14.1, the gains in direct matches were 300 elo in standard chess and 351 elo in FRC. Note that all gains in standard chess will be significantly larger with unbalanced opening books, but with normal books should be smaller with longer time controls or more threads. The elo gains from 2.5.1 are due to newer nets, small speedups, and some search improvements.
One new feature added this time is UCI Elo, which replaces the Skill levels. To activate it set UCI LimitStrength to true. There is no real difference between setting Elo to 1800 or setting Skill to 18 in older versions (for example), but the advantage is that you can use intermediate values like 1725 Elo for example. The strength of the Elo levels is not much different than the previous Skill levels except in or near the grandmaster range where they are stricter now. The intent is that the Elo ratings should be about fair against humans with similar FIDE ratings at Rapid (15' + 10") time control, although Dragon will move instantly with any Elo set in the human range. Elo levels should be used with just one thread; using more raises the strength by varying amounts, but there is no reason to do this. We would appreciate any feedback on the accuracy of the Elo levels in human terms.
As usual Dragon 2.6 is free for subscribers, is priced the same as 2.5, and is eligible for a 20% discount if you bought Komodo 14 or any later version.
Does the Komodo Dragon 2.6 engine for Android offer UCI Elo Settings ? Do you also offer a version that works with Iphone ?
Yes, but we call it "UCI Elo" instead of "UCI_Elo" since several chess GUIs have problems with "UCI_Elo". Make sure to check/set to true UCI LimitStrength.
I am visiting the Dominican Republic and decided to pit Sosa Jonathan against Skill Level 19 of Komodo Dragon 2.5.1 and here is the result, I will be visiting Dominican Republic for 5 more days and will have more tests against different Skill Levels. If I have Komodo Dragon 2.6 I can specify specific rating ;like 1965 which is Sosa Jonathan rating or other Dom. Re. Players specific rating
https://ratings.fide.com/profile/6405487
[pgn][Event "Computer chess game"]
[Site "MININT-UB2PIMJ"]
[Date "2021.12.21"]
[Round "?"]
[White "Sosa Jonathan"]
[Black "Dragon-2.5-64bit-avx2"]
[Result "1/2 1/2"]
[BlackElo "1900"]
[ECO "C62"]
[Opening "Spanish"]
[Time "07:57:20"]
[Variation "Old Steinitz, 4.d4 exd4 5.Nxd4"]
[WhiteElo "1965"]
[TimeControl "900+10"]
[Termination "adjudication"]
[PlyCount "158"]
[WhiteType "human"]
[BlackType "program"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. Nxd4 Bd7 6. Nc3 Nf6 7. O-O Nxd4
8. Bxd7+ Qxd7 9. Qxd4 Be7 10. Bf4 O-O 11. Rad1 Rfe8 12. e5 dxe5 13. Qxd7
Nxd7 14. Rxd7 exf4 15. Nd5 Bd6 16. Nxc7 Bxc7 17. Rxc7 Rec8 18. Rxb7 Rxc2
19. Re1 g5 20. a4 a5 21. Rb5 h6 22. h3 Rd8 23. b3 Rdd2 24. Rf1 Rb2 25. Rxa5
Rxb3 26. Rf5 Ra3 27. h4 f3 28. hxg5 fxg2 29. Kxg2 Rxa4 30. gxh6 Rd6 31. Rh1
Ra7 32. h7+ Kh8 33. Re5 Rg6+ 34. Kf3 Rf6+ 35. Kg3 Ra3+ 36. Kg4 Rg6+ 37. Kf4
Rf6+ 38. Kg5 Rg6+ 39. Kf5 Ra8 40. Re4 Kg7 41. Re3 Rf6+ 42. Kg5 Rxf2 43. Rd3
Ra5+ 44. Kg4 Ra8 45. Rd5 Kh8 46. Kg3 Rc2 47. Rd6 Ra3+ 48. Kf4 Ra8 49. Kf3
Rb8 50. Rf6 Rb3+ 51. Ke4 Rd2 52. Rxf7 Rb4+ 53. Ke3 Rd8 54. Rg1 Rb3+ 55. Ke4
Re8+ 56. Kd4 Rbb8 57. Rg2 Rf8 58. Re7 Rbd8+ 59. Kc4 Rc8+ 60. Kd5 Rcd8+ 61.
Ke6 Ra8 62. Rc7 Rfc8 63. Rb7 Rf8 64. Rgg7 Rfb8 65. Rbf7 Re8+ 66. Kd5 Ra5+
67. Kd4 Rd8+ 68. Kc4 Raa8 69. Re7 Rdc8+ 70. Kd4 Rf8 71. Rg1 Rfe8 72. Reg7
Rf8 73. Rc7 Rae8 74. Rh1 Ra8 75. Kd5 Rfc8 76. Re7 Re8 77. Rb7 Reb8 78.
Rxb8+ Rxb8 79. Rh2 Rb5 {User Adjudication} 1/2 1/2[/pgn]