Hi
The desktop image is for any Raspberry Pi where you attach a screen. Like a Pi3, Pi4 or Pi5
You can attach a screen, keyboard and mouse to the DGT pi, and you should then be able to use the desktop image.
Johan
PS I have made a beta version of picochess, picochess 4. It can be installed on any Debian computer, but not yet on Windows. I have tested two ways: 1) Debian dual boot, or 2) I use Oracle Virtualbox which allows you to have a Debian running in Windows. Maybe its possible to install Raspbian in Virtualbox? I have not tried. If you want to test the 4 beta you can find instructions in
https://github.com/JohanSjoblom/picochess