Twodoku : 2 Small Sudoku Merged Into 1 Big Puzzle!

Twodoku puzzle contains 2 overlapping sudoku grids. The basic sudoku rules apply to each 9 x 9 grid. Twodoku features # Content- 5 difficulty levels- Unlimited Mode generates random puzzles# Features- Hint auto fills the board with memo that has no direct conflicts with other numbers- Highlight same numbers as you select a number on board- Autosave the process of unfinished levels- Record best completion time for each level