Great, but only a shadow of the Palm Sudoku I played years ago
I very much like this Sudoku game, though I find most of the skins difficult to see. It is quick and has a large library of games. The "Clinically Insane" games are appropriately difficult (sometimes near impossible). However, ...
Here are some features I was used to on a palm sudoku game I used to play on a Palm 500 some years back:
1. Saving the state of a game, so you can try a thread without having to reveal errors, and if it fails you can return to where you started the thread.
2. Color coded notes. That will allow the user to prioritize notes and give some other advantages.
3. Blank games, so the user can enter his/her own games.
4. Saving completed or incomplete games as favorites (or games to return to), so you can return to or clear and play them again at a future time.
5. Finally, the Palm game computed random games (difficulty degree was a bit random too). That is a nice feature, and the iPod should be able to compute the game in seconds, rather than the several minutes the Palm 500 took.
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Sudoku Unlimited