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Normal sudokus
2x2
2x3
3x3
Irregular boxsizes
4
6
9
Conventions
I call a row for R, a column for C and a box for B. So R1 is
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
C3 is
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
Boxes are numbered from upper left -> lower right. So the box numbers are, with B5 colored
1
2
3
4
5
6
7
8
9