All games
Free to play in your browser. No sign-up, no download, no app to install — open a game and it starts.
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Sudoku
Fill the grid so every row, column and box holds each digit once. Every puzzle here is checked before it is dealt, so it has one answer and can be reasoned out without ever guessing. The daily is a gentler grid that fits in a coffee break; free play deals the full-length puzzle.
Two ways to play everything
Every game here has a free play mode and a daily challenge, and they are genuinely different things rather than the same game with a timer attached.
Free play deals at random, as many times as you like. It is where you learn a game, practise a weakness, or simply pass twenty minutes without anything being counted.
The daily deals one puzzle, and it is the same puzzle for every player in the world that day. That is what makes a result worth comparing — when everybody has the identical board, the only variable left is how it was played. Finish any single daily and your streak survives the day; there is one streak covering the whole site rather than one per game, so you never have to play all of them.
Every puzzle is checked before it is dealt
A puzzle generated at random can be impossible, and on the day that happens nobody can tell — players assume they were not good enough, and every score that day is noise. So puzzles here are verified first, in whatever way each game demands.
Sudoku grids are built by removing digits only while what remains can still be solved by reasoning, never by guessing. Word ladders are generated by walking the dictionary as a network, so a chain provably exists and the shortest one is known exactly. Mancala layouts are searched and kept only if every stone can be banked. Where a game has an opponent, it plays with no randomness in it at all, so every player meets the same replies to the same moves.
Pyramid is the interesting exception: its deals genuinely cannot all be won, which is why it is scored on how many cards you clear rather than on finishing. A hard deal still produces a fair comparison instead of a row of zeroes.
Public domain, and free for good
Every game in the library is a public-domain classic — solitaires, mancala, word ladders, sudoku. Nothing here is somebody else's game with the name filed off, and nothing is behind a payment or a sign-in. More about how it works.