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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
18 11
19 2475
20 9593
21 3854
22 25086
23 121397
24 264627
25 242527
26 472427
27 213385
28 1292701
29 316110
30 1368972

Sum 4333165
 
31 189145
32 1332244
33 123532
34 420983
35 28413
36 368338
37 11303
38 39013
39 1086
40 61678
41 353
42 814
43 6
44 3623
45 2
46 6
48 48

Sum 2580587

Distribution of type

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

TypeCount
Optimal Sudoku708413
Symmetrical Sudoku3367564
Slider Symmetrical Sudoku2837756
Slider Symmetrical equal Sudoku19