qqwing  A tool for generating and solving Sudoku puzzles
qqwing generate [
OPTIONS...]
qqwing solve [
OPTIONS...]
qqwing is a Sudoku puzzle generator and solver. It offers the following
features:
 • Fast. It can solve 1000 puzzles in 1 second and generate 1000
puzzles in 25 seconds.
 • Uses logic. Uses as many solve techniques as possible when
solving puzzles rather than guessing.
 • Rates puzzles. Most generators don't give an indication of the
difficulty of a Sudoku puzzle. QQwing does.
 • Can print solve instructions. Tells steps that need to be taken
to solve any puzzle.
 • Customizable output style, including a CSV style that is easy to
import into a database.

 generate <num>
 Generate new puzzles
 solve
 Solve all the puzzles from standard input
 difficulty
 Generate only simple, easy, intermediate, expert, or any
 symmetry <sym>
 Symmetry: none, rotate90, rotate180, mirror, flip, or random
 puzzle
 Print the puzzle (default when generating)
 nopuzzle
 Do not print the puzzle (default when solving)
 solution
 Print the solution (default when solving)
 nosolution
 Do not print the solution (default when generating)
 stats
 Print statistics about moves used to solve the puzzle
 nostats
 Do not print statistics (default)
 timer
 Print time to generate or solve each puzzle
 notimer
 Do not print solve or generation times (default)
 countsolutions
 Count the number of solutions to puzzles
 nocountsolutions
 Do not count the number of solutions (default)
 history
 Print trial and error used when solving
 nohistory
 Do not print trial and error to solve (default)
 instructions
 Print the steps (at least 81) needed to solve the puzzle
 noinstructions
 Do not print steps to solve (default)
 loghistory
 Print trial and error to solve as it happens
 nologhistory
 Do not print trial and error to solve as it happens
 oneline
 Print puzzles on one line of 81 characters
 compact
 Print puzzles on 9 lines of 9 characters
 readable
 Print puzzles in human readable form (default)
 csv
 Output CSV format with one line puzzles
 h, help
 Display help message
 about
 Display author and license information
 version
 Display version number
http://qqwing.com/