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Distribution of start numbers

This table shows the spread of puzzles mapped to the numbers a puzzle start with. Clicking on the number will give you a random puzzle with that start number count. I've put a sum-line at 30 since some people think a real sudoku should have less than or equal to 30 start numbers.

Starting numbers puzzles in db
10 15
11 100
12 572
13 801
14 2638
15 868
16 5159
17 740
18 4391
19 397
20 1635
21 86
22 301
23 12
24 16
25 1
26 3

Sum 17735

Distribution of type

This table show how many puzzles there are to each puzzle-type

TypeCount
Symmetrical Sudoku15185
Optimal Sudoku2550