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From Stanley Lam:
Big Sudoku Collections contains sudoku puzzles of different sizes from 6x6 to 16x16. It also contains special types: Flower Sudoku and Butterfly Sudoku.Basic Rule: Fill numbers in the board such that every row, column and region contains one occurrence of each number. Flower Sudoku: combination of 5 sudoku puzzles.Butterfly Sudoku: combination of 4 sudoku puzzles.Free play through hundreds of levels.**** Big Sudoku Collections features ****- 4 difficulty levels- 800 free levels- "Hint" auto fills the board with memo that has no direct conflicts with other numbers- Highlight wrong number- Highlight same numbers as you select a number on board- Autosave the process of unfinished levels- Record best completion time for each level- Game Center Achievements- Try to complete as many levels as possible