Komodo Dragon 2 released.

[Chessqueen]

Explain "the power of the game"? I presume English is not your native language...which means you need to stick more to specifics and less to generalities if you actually want people to understand....otherwise, you tend to sound like a crank.

If not you understand what I am writing, about it I am sorry.

There are people out there (including me and you) who have interest in engine tournaments or correspondence chess. We only get excited when an engine is stronger compared to other engines. But we are the minority.

For everybody else, it's more important to have a engine that is easier to use. Or can come up with new ideas. Or something. Whether Dragon 2 was +100 or +0 Elo against Dragon 1, doesn't really matter.

As correspondance player, i don't search the better engine in the ultra fast time control engines rating lists !
Even if Stockfish and some derivatives seem the best in many situations, they are not in some others where Leela and why not Dragon can be better for a good reason : they are différent and not a derivative....
I don't think i am alone to think that ?
Regards
Jacques

https://en.chessbase.com/post/better-th ... ubicic-1-2
According to Leonardo Ljubicic the 28th World Champion in Correspondence Chess he stated "As much as my time allows I try to follow the latest in chess engine development. From what I’ve seen, the best engines of today are Komodo and Stockfish. Both have their virtues and ... well, almost no weaknesses. Stockfish calculates variations fast, and excels in tactics and attacking, while Komodo is solid in style, and its positional play is second to none. They are very close in strength continuously developed further. Both are an excellent choice for serious correspondence chess"
https://en.chessbase.com/post/better-th ... ubicic-1-2

Probably you will like to play a similar game as Chrisw is playing with Knight Odds versus Dragon2 MCTS, and see how you do against the Dragon Beast
[pgn] [Event "knight odds match"]
[Site "?"]
[Date "2021.05.24"]
[Round "1"]
[White "KomodoDragon2, MCTS."]
[Black "Whittington, Chris"]
[Result "*"]
[Annotator "Kaufman,Larry"]
[SetUp "1"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/R1BQKBNR w KQkq - 0 1"]
[PlyCount "39"]
[EventDate "2021.05.20"]
[EventType "match"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 Nc6 6. c4 Nb6 7. e6 fxe6 8. O-O
g6 9. a4 a5 10. d5 Bxf3 11. Bxf3 exd5 12. cxd5 Ne5 13. Be4 Bg7 14. f4 Ned7 15.
f5 O-O 16. Ra3 Ne5 17. Rg3 Qe8 18. b3 c6 19. dxc6 bxc6 20. Rf2 e6 [/pgn]

[jr66]

I agree with Leonardo of course, except for one thing: since NNUE versions, Stockfish is really stronger !
I would say Leela is perhaps more useful is some positions than Dragon now ( see TCEC superfinal where Time control and hardware are interesting even for an ICCF player for help to evaluate a little bit engines ) ?
For the moment, i cannot say if Dragon is better with multi PV but work on multi PV is a very good thing for us ( engines are sometimes "closed" to one line which is not always the best and multi PV can help in this case for example )

[jr66]

Note :Here is a well known position for illustrate:
1rb1qrk1/2b2pp1/p3pBn1/3pP1Pp/1ppP4/2P1QN2/PP3P1P/R2BR1K1 w - - 0 1

Only Lc0 can find it quickly because it was simply in one of his game ! Stockfish see nothing if you don't help , same thing for Dragon....
I found only one derivative which find the good move at low depth ( 27 or max 30 anyway ) but i use always Muti PV ???

[Cornfed]

Note :Here is a well known position for illustrate:
1rb1qrk1/2b2pp1/p3pBn1/3pP1Pp/1ppP4/2P1QN2/PP3P1P/R2BR1K1 w - - 0 1

Only Lc0 can find it quickly because it was simply in one of his game ! Stockfish see nothing if you don't help , same thing for Dragon....
I found only one derivative which find the good move at low depth ( 27 or max 30 anyway ) but i use always Muti PV ???

And yet...it is not the 'best engine'!
People do like the 'exceptions that prove the rule'...

[Vinvin]

Note :Here is a well known position for illustrate:
1rb1qrk1/2b2pp1/p3pBn1/3pP1Pp/1ppP4/2P1QN2/PP3P1P/R2BR1K1 w - - 0 1

Only Lc0 can find it quickly because it was simply in one of his game ! Stockfish see nothing if you don't help , same thing for Dragon....
I found only one derivative which find the good move at low depth ( 27 or max 30 anyway ) but i use always Muti PV ???

Note that now, one more engine finds Nh4 : SugaR AI ICCF 1.90
3m17s, 1 core on an old i7 :

15 Nh4; id "Hard-Talkc
Searching move: Nf3-h4
Best move (SugaR AI ICCF 1.90 sse41-popcnt): Nf3-h4
Identical moves! Found in: 03:17
Found 511 tablebases
NNUE evaluation using nn-62ef826d1a6d.nnue enabled
...
26/46 02:21 160 340 937 1 135 929 +0,75 1.h4 Kh7 2.Nh2 Rh8 3.Bxh5 Kg8 4.Bxg6 fxg6 5.Ng4 Qf7 6.Kg2 Bd7 7.Rh1 bxc3 8.bxc3 Ba4 9.Qd2 Kf8 10.Rae1 Ke8 11.Re2 Kd7 12.Qc1 Bc6 13.Re3 gxf6 14.exf6 Bf4 15.Qc2 Kc8 16.Ne5 Bxe5 17.Rxe5 Rb7 18.Qe2 Kd7
27/46+ 03:17 224 232 786 1 132 500 +0,89 1.Nh4
27/46+ 03:47 257 801 283 1 133 511 +0,97 1.Nh4
27/52+ 09:03 615 869 794 1 133 386 +1,85 1.Nh4
27/52 10:41 726 833 890 1 133 480 +1,50 1.Nh4 Kh7 2.Bxh5 Rh8 3.Qg3 Kg8 4.Qg4 Bd7 5.Re3 Ba4 6.b3 Bd7 7.cxb4 Rh7 8.Rh3 Rxb4 9.Rb1 Ba5 10.Rc1 Rb8 11.Rc2 Bb6 12.bxc4 Ba4 13.Bxg6 fxg6 14.Rcc3 gxf6 15.gxf6
28/37- 12:26 845 049 974 1 131 746 +1,46 1.Nh4 Kh7
28/49+ 12:48 870 216 964 1 131 756 +1,50 1.Nh4
28/49+ 13:16 902 080 543 1 132 062 +1,65 1.Nh4
28/49 16:46 1 138 146 459 1 131 290 +1,70 1.Nh4 Kh7 2.Bxh5 Rh8 3.Qg3 Kg8 4.Qg4 Bd7 5.Re3 Ba4 6.Bxg6 fxg6 7.Rc1 Bd7 8.Ng2 a5 9.h4 a4 10.a3 bxc3 11.bxc3 Rb3 12.Nf4 Rh7 13.Rh3 Rh5 14.Rd1 Rxa3 15.Nxh5 gxh5 16.Qg2
29/38- 16:55 1 148 666 882 1 131 246 +1,86 1.Nh4 Kh7

[jr66]

Note :Here is a well known position for illustrate:
1rb1qrk1/2b2pp1/p3pBn1/3pP1Pp/1ppP4/2P1QN2/PP3P1P/R2BR1K1 w - - 0 1

Only Lc0 can find it quickly because it was simply in one of his game ! Stockfish see nothing if you don't help , same thing for Dragon....
I found only one derivative which find the good move at low depth ( 27 or max 30 anyway ) but i use always Muti PV ???

Note that now, one more engine finds Nh4 : SugaR AI ICCF 1.90
3m17s, 1 core on an old i7 :

15 Nh4; id "Hard-Talkc
Searching move: Nf3-h4
Best move (SugaR AI ICCF 1.90 sse41-popcnt): Nf3-h4
Identical moves! Found in: 03:17
Found 511 tablebases
NNUE evaluation using nn-62ef826d1a6d.nnue enabled
...
26/46 02:21 160 340 937 1 135 929 +0,75 1.h4 Kh7 2.Nh2 Rh8 3.Bxh5 Kg8 4.Bxg6 fxg6 5.Ng4 Qf7 6.Kg2 Bd7 7.Rh1 bxc3 8.bxc3 Ba4 9.Qd2 Kf8 10.Rae1 Ke8 11.Re2 Kd7 12.Qc1 Bc6 13.Re3 gxf6 14.exf6 Bf4 15.Qc2 Kc8 16.Ne5 Bxe5 17.Rxe5 Rb7 18.Qe2 Kd7
27/46+ 03:17 224 232 786 1 132 500 +0,89 1.Nh4
27/46+ 03:47 257 801 283 1 133 511 +0,97 1.Nh4
27/52+ 09:03 615 869 794 1 133 386 +1,85 1.Nh4
27/52 10:41 726 833 890 1 133 480 +1,50 1.Nh4 Kh7 2.Bxh5 Rh8 3.Qg3 Kg8 4.Qg4 Bd7 5.Re3 Ba4 6.b3 Bd7 7.cxb4 Rh7 8.Rh3 Rxb4 9.Rb1 Ba5 10.Rc1 Rb8 11.Rc2 Bb6 12.bxc4 Ba4 13.Bxg6 fxg6 14.Rcc3 gxf6 15.gxf6
28/37- 12:26 845 049 974 1 131 746 +1,46 1.Nh4 Kh7
28/49+ 12:48 870 216 964 1 131 756 +1,50 1.Nh4
28/49+ 13:16 902 080 543 1 132 062 +1,65 1.Nh4
28/49 16:46 1 138 146 459 1 131 290 +1,70 1.Nh4 Kh7 2.Bxh5 Rh8 3.Qg3 Kg8 4.Qg4 Bd7 5.Re3 Ba4 6.Bxg6 fxg6 7.Rc1 Bd7 8.Ng2 a5 9.h4 a4 10.a3 bxc3 11.bxc3 Rb3 12.Nf4 Rh7 13.Rh3 Rh5 14.Rd1 Rxa3 15.Nxh5 gxh5 16.Qg2
29/38- 16:55 1 148 666 882 1 131 246 +1,86 1.Nh4 Kh7

Many thanks Vinvin,
It was Crystal 3.1 on my side ( i don't know where to find this Sugar ICCF ? )...
Ha, ok sorry : https://github.com/Zerbinati/SugaR-AI-ICCF/releases
By the way, if it is an exception, i am not sure we don't have others exceptions in the 114 Vinvin's positions where "normal" engines are not so good it seem ?
Regards

[CMCanavessi]

...

Larry, when you go to the Komodo website, the link to the free version (Komodo 12?) points to the website again, no download.

[lkaufman]

...

Larry, when you go to the Komodo website, the link to the free version (Komodo 12?) points to the website again, no download.

If you click on "dragon sale" and then "komodo 12 free" it works, but I agree, we should fix the website.

[Chessqueen]

...

Larry, when you go to the Komodo website, the link to the free version (Komodo 12?) points to the website again, no download.

If you click on "dragon sale" and then "komodo 12 free" it works, but I agree, we should fix the website.

By now Komodo 13.3 should be offered for Free or for $10.00
This could be a great dead ==> forum3/viewtopic.php?f=2&t=77649&p=898387#p898387

[Madeleine Birchfield]

Larry Kaufman, have the Komodo team tried out Monte-Carlo Graph Search yet? This paper claims that it is an improvement over Monte-Carlo Tree Search:

https://arxiv.org/abs/2012.11045