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Hi again Gerald

Yes right we shall prepare a small video instruction  🙂

All the best



Gerald has reacted to this post.

Hi Pietro,

I have permission problems since the last update to 2.1. On my Samsung tablet with Android 10 I get the error "/data/user/0/org.petero.certabodroid/files/engine/engine.exe":error=13, Permission denied.

I have no problem on an Android 9 Smartphone.

I´m not really sure, if the error comes since the update or earlier after an Android update. Mostly I played on the Smartphone so I didn´t find the error now after updating the App.


Greetings Tobias

Hi Tobias

Thanks for reporting ok 2.1 was very small fixing we did will check.


...same problem here....

hello Julian Tobias

We are checking to replicate the error, I've sent an .apk can you please check on your android 10 if fix the issue?



Hello Pietro, 
I also have this error message: /data/user/0/org.petero.certabodroid/files/engine/engine.exe":error=13, 
Permission denied
Furthermore, I cannot yet use the analysis function with the chessboard.
Error message: "Illegal move" although I have placed the pieces correctly.
I have tried several smartphones, always the same error in the analysis setting.
CertabOdroid would be very useful for the analysis if everything worked.

Many greetings Ingo

Hello Ingo

Ok thank yes this error is appearing on Android 10 devices this is due to main droidfish in background ( we think is problem with cuckochess actually) actually with latest Sdk requested by playstore    https://github.com/peterosterlund2/droidfish/issues/59    we are trying to fix, in the meantime i can send you a interim version which will run on 10 too.

Well the analysis shall run i think it's not running because it use theUCI engines and the engine is denied to operate.

All the best


Hello Pietro,
Thank you very much for your answer, the analysis works wonderfully on the tablet and 
on the smartphone as long as I haven't connected it to the chessboard. 
As soon as I connect the smartphone to the board, the error occurs. Try it out yourself.
Connect your smartphone to the board, start a new game, activate the analysis, 
then the game stops after 2-3 moves. But I'll try again tomorrow. 
I think CertabOdroid would be a great program if the analysis and 
replay of chess games would work. I don't use UCI.

All the best


Hi, I bought an USB-A to USB-C adaptor to connect my Certabo eboard to my Andrpod cellphone.

Started up Certabodroid (I know it's work in progress obviously).

The good news:

Although seemingly slightly bigger lag, playing a game against the engine in Certtabodroid works with the Certabo eboard (moves come through just a bit less fast, but OK)

A problem I encountered:

The option play on lichess.org, I did not get that to work.

I made a new board API token on lichess.org (just as the board API token made to get the eboard running with lichess via my laptop.

But besides limited menu-options (e.g. you cannot specify you want to play the computer at lichess, especially for testing purposes) the main problem I encountered is that once it starts connecting to lichess.org a few msecs later I get an invalid token error.

Made a brand new API token and copy-pasted in Certabodroid to make sure I had no typo's but still I get the invalid token message in Certbodroid.

So the function to play on lichess.org with the eboard via the Certabodroid app on my Android phone is not functioning for me thus far.

Do I make an error / mistake, am I overlooking something, or is this a known bug in the current development status of Certabodroid?

Hi Michiel

Sorry for bit delay in answer, did you manage in the end?

Yes new token can take some time.ti be activated so if you have not managed please create a new One and wait a bit. Be also sure to copy respecting between capital letters an normal one as they are considered different characters from normal one.

Also double check you activate support for Api board when creating the token

Let me know