|Easy - Gentle stuff - most can be solved by crosshatching alone.|
|Moderate - A bit harder - you'll need to know about pairs and the like.|
|Hard - Tougher - understanding number-claiming is useful.|
Really Tough - Serious - you'll need to know all the tricks.
and if these aren't puzzling enough, you could try:
|Outlaw - These puzzles defy the basic logic in our solver program. They may require guesswork - but they may not. Try them if you're tough enough!|
Still puzzled? See How To Solve Sudoku.
(c) Paul Stephens 2005. All rights reserved.
The puzzles in this gallery were generated by Random Sudoku @ paulspages.co.uk, and are licensed for personal use only.