Greyhead Studio loves a good classic. For those who enjoy a mental challenge and logic-based games, we present an elegant version of the number-placement puzzle, Sudoku. Choose between five difficulty levels (Easy, Normal, Hard, Samurai, and Shogun) of the beautiful Japanese watercolor design. Your goal is to fill a 9×9 grid with numbers so that each column, row, and each of the nine 3×3 subgrids contains all numbers from 1 to 9. Challenge yourself and get through the most difficult level. Have fun testing your logical skills!