Sudoku Entry

Enter the digits of a sudoku by moving the mouse over a cell and typing the digit, or enter it in the textbox (1-9 for digits, any other character for empty cells) and click Enter. Once you have entered the sudoku, click Solve and the solution will be displayed along with the sudoku's difficulty, or click Play to play the sudoku in your browser (Unless it has multiple solutions or no solution, in which case you will be given a random sudoku).

Sudoku is a logic based number placement game that was invented in the US, then popularized in Japan before spreading to the rest of the world. The goal is to place digits 1 through 9 such that each row, column, and 3x3 box contains exactly one of each digit.