I built UberSudoku in response to a programming challenge by Uber. I've never been much of a sudoku player so this was an interesting way to learn the game from the inside out. If you are an avid sudokuer with ideas on how to improve this puzzle, I would love to hear from you.

• No number can repeat in a row or column.
• No number can repeat in the same three by three square.
• There can be only one solution(except in easy mode, to make it extra easy)

• Nodejs
• CoffeeScript
• CSS3
• Fourth Woods Media sudoku engine

• Arrow key navigation
• Subscript notes
• Allow illegal inputs
• Write a dancing links solver
• Minfify project with requirejs minifier for faster load time
• Reset board