Are these logic puzzles always solvable?

Yes. Every generated board is verified by a solver first, so each puzzle has a genuine solution that pure logic can reach. No guessing is ever required.

Which logic puzzle should I start with?

Sudoku if you want familiar, Nonogram if you like revealing a picture, Slitherlink if you want the one many long-time puzzle fans rate highest. All three explain their rule in one line.

Do the puzzles get harder?

Yes. Most games offer several sizes or difficulty settings, and bigger grids need deeper chains of reasoning.

Do they work on a phone?

Yes. All the grids are touch-friendly: tap to fill, tap again to mark, with pinch or fit-to-screen sizing on small displays.

Logic Puzzles: Play Free Pencil Puzzles Online

This is the pencil-puzzle shelf: the grid games from Japanese puzzle magazines, each with one clean rule and one provable answer. Sudoku and Nonogram (picture logic) are the famous ones. Kakuro is the crossword built from sums. Slitherlink asks you to draw one single loop, and it is many puzzle fans' favorite of the whole genre.

From there the catalogue goes properly deep: shading puzzles like Nurikabe, Hitori, Tapa and Norinori; region puzzles like Shikaku, Fillomino, Suguru and Star Battle; path and loop puzzles like Masyu, Numberlink, Hashi and Flow; and placement puzzles like Tents, Battleships, Skyscrapers, Thermometers, Aquarium, Futoshiki, Binario, Hidato, Dominosa and Slant.

Two promises hold everywhere. First, every board is checked by a solver before you see it, so there is always a real solution and you never need to guess. Second, every game explains its rule in one short line and marks mistakes gently, so an unfamiliar puzzle type takes about a minute to try. If you like reasoning your way to certainty, this page is the best place on the site.

Logic Puzzles You Can Play Online

Logic Puzzles: frequently asked questions