So here's another. I guess my first patch would have caused H2O or GloHD settings to take over. There is a width 1080 specified in the CSS which is display width of the H2O. I change 1080 to 1404 this time, which is the width of KA1. Not sure if that's all... probably not.
You have to do this yourself. See over here:
https://www.mobileread.com/forums/sho....php?p=3328482
This program can help you edit the CSS. By default it seems to be doing so for nickel but it might work for libsudoku.so too. Either change nickel to libsudoku.so in his code or rename the libsudoku.so file to nickel while using this. If you have questions you should ask the creator, never used it myself.
Proper fix will probably involve a lot of trial and error, no way to do it without owning the device you know ...