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
