(Shirin Sudoku 20) سودوکو 20 شیرین

classicsudoku9x9_hard04_puzzle-001.gif classicsudoku9x9_hard04_solution-001.gif

سودوکو 20 شیرین:  جمعه، 19 امرداد 1386
Shirin Sudoku 20: Friday, 10 Aug. 2007 (Hard 4)

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