Interface=excellent, puzzles... – Minimal Sudoku Review

This is absolutely the best looking and most usable sudoku app I've come across. And I downloaded quite a lot of terrible ones before finding this app. Sadly, at about level 30 these puzzles seem to have no logical way to solve them. I do Will Shortz books of hard sudoku all the time and have no trouble reasoning my way to solutions. But at a certain point with these I just have to pick a cell with only 2 pencil marks and choose one of my options. I've sent screen shots to my engineer/math major husband, and he too is unable to reason his way to a solution for these puzzles. That really takes a lot of the fun out of this app. I would be completely addicted and eager to spend money on the higher difficulties if the puzzles were able to be properly solved without guessing. The other thing I don't like is if I want to play an easy puzzle before bed or something, I then have to redo all the levels of the medium difficulty again.
Review by Ndstewrt on Minimal Sudoku.