About

Why Astuce Jeux HQ exists

We're a very small team, and we love puzzles that fit in a single rule and can be replayed forever. Astuce Jeux HQ brings four of them together, all made of numbers: Kakuro, Futoshiki, Skyscrapers, and Calcudoku. We wrote them ourselves, in plain JavaScript, with no game engine and no framework.

What we like about these four is that none of them is a hand-drawn grid: they are all generated and verified. The fun comes from a solver that guarantees a unique solution, and a generator that never repeats itself.

What we built

Four games, each with its own page, illustrated rules, and best scores. The whole site is one stylesheet and one script file. There is no build step, because none is needed.

Each game's logic is kept separate from its display. That lets us test the rules without a browser: the Kakuro, Futoshiki, Skyscrapers, and Calcudoku generators run in our test suite on every change, and every grid produced is re-solved to prove it is unique.

Daily challenge

Each game draws a grid from the date. Not from a server, not from a random draw: from a function that turns the date into a number, and that number into a grid. Two people on opposite ends of the country open the same page and face the same puzzle, without a single byte of data passing between them.

We care about this for a specific reason. A daily challenge is usually the excuse a site gives itself to open an account, send a notification, and build a leaderboard. Here, the date is enough. Your streak lives in your browser, is compared to no one, and if you lose it, you're the only one who knows.

What we deliberately don't do

• No accounts. There is nothing to create, so nothing to lose, nothing to resell, nothing to leak.
• No analytics. We don't know how many people are reading this sentence, and we're fine with that.
• No advertising today. If that ever changes, the advertising disclosure already describes the rules we hold ourselves to.
• No online leaderboards. Your best scores and your streak are in your browser; they have no exchange value and no recipient.
• No notifications, no reminders, no emails telling you your streak is in danger.

Two things we say plainly

Kakuro shows a few starting cells. A cross-sums grid of this size doesn't always have a unique solution from the sums alone; we reveal the smallest number of cells needed to make it unique, rather than enlarging the grid or pretending otherwise. The other three games need no given cells of this kind.

Your streak depends on your device's clock. Set it back a day and you'll replay yesterday's challenge; set it forward and you'll skip a day. We could check it against a time server. We won't: it would be the site's first network request, and it would exist to monitor someone who is only playing against themselves.

Reach us

The site is run independently by Astuce Jeux HQ from Dalton Hwy, Deadhorse, AK 99708, United States. Phone: +1 (877) 474-3565. Email [email protected] or use the contact page. A real person reads, and replies within a few business days.

Last updated: August 26, 2026.