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Normal sudokus
2x2
2x3
2x4
3x3
2x5
3x4
3x5
4x4
5x5
6x6
7x7
8x8
9x9
Irregular boxsizes
4
6
8
9
10
12
16
Diagonal
2x2
2x3
2x4
3x3
2x5
4x4
5x5
6x6
Disjoint groups
2x2
2x3
2x4
3x3
4x4
Irregular & Disjoint groups
4
6
9
No boxes
6
9
16
25
30
36
49
Odd/Even
2x2
2x3
3x3
4x4
Odd/Even irregular
4
6
9
Solution
3
8
2
4
6
5
1
7
9
1
5
9
2
3
7
4
8
6
4
7
8
9
1
3
6
5
2
6
1
3
7
9
8
2
4
5
9
2
6
1
5
4
7
3
8
8
4
5
3
2
6
9
1
7
5
6
4
8
7
2
3
9
1
7
3
1
6
8
9
5
2
4
2
9
7
5
4
1
8
6
3
Showing solution number: 874
Puzzletype: Symmetrical Sudoku
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