Sudoku



Sudoku layout is like a puzzle, partially completed grid; an a quatity of initials (so called given). See also there are a number of blocks (marked box). also observe bands (adjacent rows) and stacks (adjacent columns), It is a type of NP-complete problem, and the solution a Latin-square

activity
How many sudokus there are?

a) a quantity of 7 places

b) a quantity of 21 places

c) over 9¡

6 670 903 752 021 072 936 960

deserve a perusal
The hidden logic of sudoku