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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,
and
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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Comments: ( Back to comment list | You must be logged in to post comments.)
re(2): solution (part 1 only) | Comment 5 of 6 |
(In reply to re: solution (part 1 only) by Charlie)

Since I can't change the title of my previous reply post on this topic (part 1) to incorporate the word spoiler, I've relabeled it as solution to warn of a spoiler within. 
  Posted by Charlie on 2018-07-14 15:53:58

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