I am having a teaching class for children, most of them are just starting to learn how to play. I teach the basic skills like liberty, connection, capturing, counting liberty... When they get bored with these practices, they play each other. In addition, I would like them to play against AI programs. I looked over OGS where there are a couple of AIs for ddk. However, those programs are not available timely and consistently.

Is there a better AI for beginners (25k - 10k)?

Maybe https://www.cosumi.net/play.html

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A good system naturally covers all corner cases without further effort.

I'm pretty sure the free trial version of MFOG is 18 kyu. That'd be fine for your weaker students but not for the 10K's. Unlocked (plays to ~1d with that and 3 kyu MCTS, the harder problem sets, etc) it's not free. But you could try emailing Fotland to see what deal he might be willing to work out. It doesn't hurt to ask in a situation like this.

11 kyu bots are available on IGS in the room "Beginners(Robots)". I think they are clones of each other.

https://www.sjeng.org/leela.html

Leela 0.11.0 https://www.sjeng.org/dl/setupLeela0110.exe
free program, different sizes of boards 7x7 - 25x25, choice of difficulty level, rating game on 9x9 and 19x19 with a rating of 30k - 1k and automatic level change

Leela 0.4.6 https://www.sjeng.org/dl/setupLeela046.exe sizes of boards 9x9 - 37x37

"Leela 0.11.0 https://www.sjeng.org/dl/setupLeela0110.exe"

Thank you very much.

I have installed Leela 0.11.0, and tried to set a level, let't say, 25k with 13x13 board size, but I couldn't.

How do you set a difficulty level of this program?

I was involved in one project for an MCTS bot, but it already beats GnuGo on 9x9, and loses on 19x19

GnuGo is not strong at 9x9, but it makes sensible moves, which can be a challenge to beginners. I think it would be a perfect match to someone who gets the rules enough to do go puzzles

http://www.gnu.org/software/gnugo/

deungsan rating game (the program determines your rating and changes the level of the game): file-new rated game
or file-new game-engine max level

iopq:

I downloaded Gnu Go 3.8 and used Panda glgo for hosting it, and play myself against it. However, glgo missed scoring dead stones at the ending stage.

Is there a better go client than Panda Glgo that can tell life and death of a group?

GnuGo itself has this feature

So use GoGui and let GnuGo tell the life and death of a group. You add a new engine and do `gnugo --mode gtp` as the executable (from the correct folder)

As you can see, the stone I put in its territory is properly dead and the seki stones are properly alive