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ForumCERTABO FORUM: Certabo generalDavinci Engines

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Davinci Engines

#11 · May 2, 2021, 1:52 am

My son was able to do something almost as good. He extracted all the weight files to ~/maia-weights (and unzipped them, so it has maia-1100.pb, 1200.pb etc.), and deleted the existing .pb in ~/davinci/engines. Instead of dropping the weights file there, he put a symlink there that points to the weights file you want. Lastly, he wrote a script to give a GUI to control which set of weights you'll use.

As a result you can change the LC0 weights on the PI desktop by clicking on an icon - not quite as easy as choosing an opening book, but not much more difficult. I assume that you could modify the script and add other weights to the directory as well.

The script is at: https://pastebin.com/UnBHkXXf .

Let me know if you have questions and I can ask my son - the last time that I wrote a program it was stored on a paper tape, and outputted onto a teletypewriter.

I have uploaded the script.

tobias has reacted to this post.

#12 · May 2, 2021, 3:09 pm

Thanks a lot for the hint Arthur.

In fact I have planned to something similar as well, but did not really know where to start.
I took a few parts from your son's script and created a new one that supports basically unlimited number of lc0 networks.

Via a desktop shortcut

a simple dialog opens that allows to select from a list of lc0 networks:

once the button is pressed, the program creates a symbol link to the selected *.pb file:

now open DA VINCI and ensure to use engine "lc0" and enjoy lc0 with your prefered network

here is the how to install:

prepare the required directories
- mkdir /home/pi/lc0_net_switcher
- mkdir /home/pi/lc0_net_switcher/lc0networks
prepare the lc0 network files:
- mv /home/pi/davinci/engines/*.pb /home/pi/lc0_net_switcher/lc0networks
- download as many lc0 networks you want and place them into /home/pi/lc0_net_switcher/lc0networks
prepare the actual tool:
- download the script from https://pastebin.com/kNaAkyKY and save it under /home/pi/lc0_net_switcher/lc0netswitcher.py
- set permissions on the script:
  - sudo chmod 755 lc0networkswitcher.py
- create a file /home/pi/Desktop/select_lc0_net.desktop with following content:

[Desktop Entry]
Name=lc0_network
Comment=Select lc0 network
Icon=/usr/share/icons/gnome/48x48/categories/preferences-desktop.png
Exec=python3 /home/pi/lc0_net_switcher/lc0netswitcher.py
Path=/home/pi/lc0_net_switcher
Type=Application
Terminal=false
Categories=None;

- set the correct ownershipt and permission to the desktop shortcut:
  - sudo chown root:root /home/pi/Desktop/select_lc0_net.desktop
  - sudo chmod 755 /home/pi/Desktop/select_lc0_net.desktop

that's it.

Hope this is useful for someone else 🙂

best regards from vienna, Austria.

/Christian

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tobias has reacted to this post.

#13 · May 2, 2021, 6:21 pm

A great thank to you both, Arthur and Christian. First test looks good. Installed it on two setups. Both run fine.

#14 · June 21, 2021, 9:32 am

Hello Guys

Quick update as we released new DaVinci image 4.0

https://www.certabo.com/wp-content/uploads/2021/06/DaVinci_4.0_Jan_2021_BT_OL_Maia.zip

The new release now supports

1) BT connection for both main application and online software

2) Added quite few engines about 100 in total now

3) Added also Maia Chess with a selection of Elo network ranging between 1200 and 1900 you can select double clicking on the icon prior launching the software (you can add as many as you like)

4) Support also bots in chess.com

Special thanks to Arthur and Christian we implemented the maia selection network as per their devs. You can add other Elo network dragging and dropping them in the directory.

We also fixed the bug when calling the UCI we found out there was error in calling the engine dependant on the name syntax (it was stupid but sneaky thing avoid space in the engine name) that's why was apparently called but not properly working returning unknown error now all of them work except couple we removed and we are still checking.

All the best

Pietro

#15 · June 22, 2021, 8:03 am

Ciao Pietro,

I installed the new DaVinci image. I tried rodentiii and trodent engines and DaVinci froze.

I think I'll drop by at your place to have some info about some aspects I'm not fully understanding.

Ciao, Daniele

#16 · June 22, 2021, 8:51 pm

Daniele,

have you choosen a book ? I can play rodentIII and trodent when I choose a book, if not it freezes too. In the UCI options rodent has the option to use a book in default. Maybe that's the problem.

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