Four ways to put your mind to work
Crack a hidden code, slide numbered tiles into place, complete a grid of zeros and ones, or connect an archipelago without crossing a single bridge. Nothing to install or pay for, and nothing leaves your device.
Four puzzles, one daily challenge in each, the same for everyone
Each game generates its daily puzzle from the date. No server is contacted: the same date produces the same seed, and therefore the same puzzle, on every device. Solve any one of them to extend your streak by a day.
Challenge for today
Solve a challenge today to start a streak.
Four puzzles, four different ways to think
Each has its own page, illustrated rules, and personal records. Every game stands on its own.
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Deduction puzzleCodebreaker
Four hidden pegs, six symbols. Each guess tells you how many are correct, but never which ones.
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Three clicks. That’s all it takes.
- Choose a game.Each game has its own address. Bookmark it to return straight to the board.
- Play.Everything runs in your browser. During a game, the site contacts no server—because there is no server to contact.
- Keep your records—or don’t.If you allow the “Preferences” category, your best results stay in this browser. Otherwise, every visit starts fresh.
A few facts you can verify
No third-party requests
No remote fonts, analytics scripts, or share buttons. Open your browser’s Network panel: once the page has loaded, there is no further traffic.
A solver tested against every code
The Codebreaker solver was tested against all 1,296 four-peg codes, one by one. It solves every code in no more than six guesses, averaging 4.50.
Puzzles that never require guessing
A Takuzu grid appears only if a solver using the game’s three rules can finish it without assumptions. A Bridges board appears only if it has exactly one solution.
One script file
The entire site, including the games, fits into one stylesheet and one JavaScript file. No framework, build step, or dependency updates.
What people ask us most often
No. No account, email address, or password. Open the page and play. Your records stay in your browser, and only if you have allowed the “Preferences” category.
Nothing—now or later. There is no paid version, virtual currency, or puzzle locked behind a paywall.
No. The site loads no analytics scripts or advertising networks and sends no requests to third-party servers. All four games run entirely in the tab you opened.
No. Nothing is wagered and nothing is won. There are no prizes, drawings, or tokens to buy. Every result depends only on how you play.
Yes. The layout is mobile-first. All four games are played by tapping cells, tiles, or islands directly; none requires drag-and-drop.
Each game generates a puzzle from the current date. It is the same for everyone, changes at midnight, and solving any of the four extends your streak by one day. Nothing is sent anywhere: the date alone recreates the puzzle.
Try Sliding Puzzle if you have five minutes, Codebreaker if you enjoy eliminating possibilities, Takuzu if you want pure deduction without guessing, or Bridges if you do not mind undoing everything once to see why the network would not close.