Enter a sudoku puzzle string below (see the Thonky.com sudoku page for an example of a puzzle
string in the text area below the puzzle), then click the Count Solutions
button to find out if the puzzle has a unique solution, multiple solutions,
or no solutions (i.e. an invalid puzzle).
All valid solutions will be listed.
Number of solutions: 1
Solved in 0.0036158561706543 seconds
Original puzzle: .5..1.2....85...1.....3...8.....2....7...6.3.1...7.9..7.....5..4......6.3..8...4.
Solution:
653718294248569317917234658594382176872196435136475982789643521421957863365821749