Rules

The main rules are quite simple and was discovered by Howard Garns. So they are:

  • in the table 9×9 fill numbers 1-9
  • each row has to contain all numbers 1-9 (so none can repeat)
  • each column has to contain all numbers 1-9 (so none can repeat)
  • each square 3×3 starting on 0,0; 3,0; 6,0; 3,0; 3,3; 6,3; 6,0; 6,3; 6,6 has to contain all numbers 1-9 (so none can repeat)
  • that's it
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