Where can I download the files for picochess 4.2.3

[And Cos]

Could someone share a link with me so I can build a picochess.

thanks 

[Johan Sjöblom]

See instructions here:

https://github.com/JohanSjoblom/picochess#quick-installation

[And Cos]

Thank you!

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[Johan Sjöblom]

I have seen reports on some missing engine files… Can Randy or DJ Decker or someone who knows remind me which files we are missing…

- There are 1 or 2 nnue files for the engines/aarch folder… or is uci setting use nnue wrong?

- There is one missing personality weights file for LC0 in the weights folder?

And are they missing in the lite or small package?

— Johan

[RandyR]

There's a missing lc0 weights file:

https://groups.google.com/g/picochess/c/1uwvsFtGIA8

DJ mentioned a missing .NNUE file for SF16 (a-stockf) but I built it for classic evaluation so the NNUE file isn't required unless you alter the a-stockf.uci file to specify a weights file:

https://groups.google.com/g/picochess/c/6liJZYYfKaY/m/Y_4ZTBXxBgAJ

Randy

[Dirk]

And for me it looks like in the current master version the New Game function by setting pieces to the starting position is broken….

[Johan Sjöblom]

Yes its broken in master… dont know when it happened, now its only fixed in the 367-moderized-webclient.

https://groups.google.com/g/picochess/c/6liJZYYfKaY/m/GUt0JOpGCQAJ

As soon as we have completed testing of that branch I will merge it to master.
— Johan

[Johan Sjöblom]

The workaround in master for the lost-on-time not correctly doing new-game when you set pieces to starting position on a eboard:

When the game is over on time, use the DGT clock/menu Game Setup / New Game command, or the web client New Game command if available.
Then set the pieces to the start position.
If you already reset pieces and hear Take Back, use the explicit New Game/Game Setup command afterward to force the reset path.

I found out where it was broken. So alternatively you can checkout the master point before it was broken:

git checkout a634054

I cannot easily cherrypick the solution from the 367 branch because that branch introduces a new state variable game_started. And the bug fix is done utilizing that new variable. It wont be long now until we can merge the 367 so I hope you can use the workaround or do the git checkout for now.

-- Johan

[Johan Sjöblom]

I hotfixed the above issue in master! No need for workaround or special git checkout. A git pull or update will do it.

— Johan

[Dirk]

That’s always the best solution for the master branch.

Thank you so much Johan!

Dirk

Am 20.04.2026 um 05:32 schrieb Johan Sjöblom <messi...@gmail.com>:

I hotfixed the above issue in master! No need for workaround or special git checkout. A git pull or update will do it.

To view this discussion visit https://groups.google.com/d/msgid/picochess/8f4f4f16-2318-4773-9bca-a8da63682f6bn%40googlegroups.com.

[Dirk]

Unfortunately I still get a "take back" message instead of "New Game" when I put the pieces back instating position. Nothing happens on the web board.

[Johan Sjöblom]

And it was the case when you lost on time? Did you get anything in the log. I added a log to say something like "takeback path"... if it goes into takeback.

Maybe the result 1-0 or 0-1 was not set? If I need to repeat the exact same situation, what should I do?

Anyway... I will check it more thoroughly some evening this week. And yes, master should always be hotfixed, agree with that.

[Dirk]

No it has nothing to do with the ending - I just played a couple of moves and put the pieces back in starting position.

I will have to check the log when I am at home later…

Thanks 

[Johan Sjöblom]

OK, me too, not at the computer now... But I only hotfixed the specific case that was discussed... Losing on time, and then putting back the pieces in starting position. I used the "*" marking to detect that game is no longer active... Sounds like you found another variant, putting back pieces while the game was still active...

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[Johan Sjöblom]

No need to check the log. Now master is hotfixed to always start a new game when an eboard sends starting position.

If you do a git pull or update in some other way you should be able to verify this.

[Dirk]

Looks good now - Thanks Johan.

[Dirk]

by the way: just a small cosmetic issue of the 1024 x 600 touch display: the button function panel below the board is a little bit too long/wide.

[Johan Sjöblom]

Please test the new branch 367-modernized-webclient https://groups.google.com/g/picochess/c/6liJZYYfKaY/m/HeaYImiNAAAJ

As it no longer has CLR/PCS which is now in the new menu, and instead the upload/download PGN is placed on the board, but it should now be narrower.

We need to know that the new layout works and we should target testing different screen sizes there... If its a problem there still then I think we can drop the PGN download hotkey and only have download in the menu.... If needed we can also drop the upload PGN arrow now sitting under the board...

-- Johan