Sudoku Proofs
As well as producing our own proofs, we also accept (and encourage!) submissions from players. If you have a proof that you would like to share, then send us an email so we can work something out.
For more sudoku proofs check out Bruno's Sudoku Proofs
Every digit from 1 to 9 must appear:
  • In each of the columns,
  • in each of the rows,
  • and in each of the nine boxes.
    • Some Handy links are:
  • The Wikipedia entry on Sudoku.
  • A Solver.
  • How to make your own.
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