For winning 25€ in the Sudoku of our newspaper Donaukurier there is a chance up to midnight. ;-)

I've optimized my rsudoku application to be as fast as 0.006 seconds to solve the Donaukurier Sudoku from the last post.

Resolved Donaukurier Sudoku July 14th 2021
Resolved Donaukurier Sudoku July 14th 2021