Classic puzzles. Global leaderboards.

Yes. Every game is free to play in your browser, with no download, registration or sign-in required. Guests can enjoy daily challenges and have eligible results appear on the leaderboards. Signing in is optional and lets you keep your account and scores across devices.

There is much more than classic Sudoku: try Killer Sudoku, Mini Sudoku, Sudoku X and Jigsaw Sudoku, all in one place. Classic Sudoku offers difficulties from easy to expert and puzzles checked for a unique solution. Add logic puzzles, solitaire, Mahjong and 2048, and there is always another way to challenge yourself.

Fresh daily puzzles arrive at 00:00 UTC. Everyone playing the same game and daily mode receives the same challenge, making it a fun way to compare your progress. Only your first completed daily result is ranked; you can play again for practice and explore other games whenever you like.

Yes. Global and country leaderboards let you chase each game's records and daily results. Ranked plays are checked by the server using move logs and server-measured time, so your progress is compared using consistent rules.

Yes. Play in a browser on your phone, tablet or computer without installing an app. On-screen controls make mobile play convenient, and supported games also offer keyboard shortcuts. On phones, every game can go full screen, and wide games such as Solitaire and Mahjong also have a landscape mode with bigger cards. Dark mode follows your device setting. The interface is available in 23 languages; the available word-game languages depend on the game.

The game board comes first. Ad placements are outside the board; when between-round ads are enabled, they appear only on some new-game starts and can be skipped after five seconds. They are not triggered by your moves, so you can concentrate on solving the puzzle.