Welcome to the world's largest web site devoted to logic puzzles! We've got more than 25,000 unique puzzles available for play, both online and the old fashioned way - with pencil and paper.

6 days ago · Puzzles with larger grid sizes and higher difficulty levels will have a larger maximum number of points. To increase the point potential, select a greater grid size or difficulty level (or both).

6 days ago · Get ready to solve! A brand new 4 x 5 puzzle has been initiated and is ready for you to begin whenever you're ready. The timer will begin the moment you click the "Start This Puzzle" …

Solve this Sudoku-like puzzle by satisfying various greater- and lesser-than relationships peppered throughout the grid. Multiple puzzle sizes/variations available.

6 days ago · New puzzles added for 2026 Posted by: vandykat March 11, 2026, 3:16 pm New puzzles added for 2026 Posted by: alw7ays March 8, 2026, 10:49 pm New puzzles added for 2026 Posted …

If you're new to grid-based logic puzzles, this tutorial will teach you the basics. Start with the "Introduction" first, then move on to the tutorials discussing specific clues or solving methods.

Who's Online Below you'll find a short list of all registered players currently online, along with their avatar images, last active time, and a link to their personal scorecard. Currently online: 100 registered …

The official, Logic Puzzles Hall of Fame, listing the current top 100 ranked players of all time. It takes a bit of patience and a great deal of dedication to make it here.

If you are working your way through our book Fiendish Logic Puzzles, and you need to check your progress or get a hint for a particular puzzle, you've come to the right place!

Logic Puzzles (Tablets) Solve logic puzzles anywhere, anytime, on your mobile tablet device! Available for iPad, Kindle Fire, Nook Color and all major Android tablets. More Information