Sudoku XO

This version of the Sudoku game is intended for the advanced player. A diagonal puzzle format, overlap, double overlap, and quad overlap puzzle formats are supported in addition to the traditional 9x9 format. Additional features are provided to allow you to solve even the toughest puzzles including: 1. input error prevention* 2. highlighting* 3. possible numbers* 4. continuous updating of possible numbers* 5. snapshot screen storage 6. completed numbers 7. hints 8. puzzle solution 9. puzzle magnification 10. camera puzzle entry. * configurable options