Sudoku

Mechanics

• The game has 2 modes: pencil and write.
• Pencil mode allows the player to try out multiple values on the squares
• Write mode inputs a value that will be checked against the solution.
• To toggle game modes, press M.
• If the number you write (in write mode) is incorrect, certain squares will be highlighted red.
• If your mistake is caused by a duplicate value in a row/column/subgrid, then the these duplicates will be highlighted.
• Else, your answer was not a part of the original solution. In this case, the current selected square will be highlighted red (although it will look grayish purple since the blue and red mix).
• At any time, you can press SPACE to reveal the solution, or R to restart.