> I was so disappointed to see the brute-force solving solution to work perfectly fine I had the same slight disappointment when hacking a PostScript solver to

> I was so disappointed to see the brute-force solving solution to work perfectly fine I had the same slight disappointment when hacking a PostScript solver together back in 2005 (see https://chris-lamb.co.uk/posts/sudoku-solver-in-postscript https://chris-lamb.co.uk/posts/sudoku-solver-in-postscript) On the positive side, a brute force approach means you can easily test for unique solutions.