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Counting sudokus (Posted on 2018-07-13) Difficulty: 3 of 5
You are given a 9x9 grid of numbers such that:
a. each row,
b. column,
c. each of the nine 3x3 grids
has each number 1 through 9 exactly once.
Lets call it Sudoku puzzle's solution or SPS.
A grid with condition c. removed is called a Latin Square, LS.

1. (d2) how many 9x9 LS's are there?
2. (d4) And how many 9x9 SPS's ?

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
solutions TBDSteven Lord2018-07-14 22:31:32
re(2): solution (part 1 only)Charlie2018-07-14 15:53:58
The internet re part 2 (spoiler)Charlie2018-07-14 15:42:49
Solutionre: solution (part 1 only)Charlie2018-07-14 15:35:08
Thoughts on Part 2Steven Lord2018-07-14 07:23:21
solution (part 1 only)Steven Lord2018-07-13 23:50:35
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