Nightwatch
Nightwatch is a free Light Up (Akari) logic puzzle for Android by Brightloop Studios. Stand one lantern in every coloured courtyard until every square is lit. A new board arrives every night, the same for everyone.
A puzzle postcard for you
Light the town to open it.
Tonight · October 19
21 dark0:00
5×5 Night 49
This board needs JavaScript to play. The rules and the worked steps on this page read without it.
Coming soon to iPhone
Tonight's board plays free right here, every night.
Add to Home Screen
- Tap the Share button in Safari.
- Choose Add to Home Screen, then Add.
Nightwatch then opens like an app, with tonight's board one tap away.
A new board arrives at midnight
The four rules
- Every courtyard gets exactly one lantern.
- A lantern lights its own square and shines along its row and column until a wall stops it. A courtyard edge does not stop light, and a lantern set on a lit square is dazzled, which is never allowed.
- No lantern may shine on another lantern.
- Every open square must end up lit.
That is the whole game. Every board has one right answer, and you can reach it from what is on the screen, step by step, without a guess. How the deductions work.
What the app adds
Tonight's board is the same here and in the app. The app keeps going after it:
- Seventy campaign rounds in five districts, from five-by-five yards to nine-by-nine streets, each named for the corner of the town it lights.
- Free play with hundreds more boards at every size: gentle, tricky or deep.
- The archive. Past nights wait there, and every streak starts with two spare nights in hand.
- Hints that teach before they tell. The first two are free whenever you want them: one names the technique the board is asking for, the next shows the squares it acts on. A third can point to one square and prove it.
- Offline play. Tonight's round, your saves and the first two hints never need a network. There is no account and no sign-in.
Nightwatch is free, and ads pay for it. Nightwatch Premium is one payment of $4.99: it turns off the ads between boards for good, and hints are free, every time.
Coming soon to iPhone
Tonight's board plays free in your browser, every night.
One answer, never a guess
We ran every board in Nightwatch through the game's own solver: 1,656 in all. Each has exactly one solution, and each can be finished with six named deductions, without a guess. How the check works.
Learn the deductions
Questions
Is Nightwatch free?
Yes. Nightwatch is free on Android, and ads pay for it. Nightwatch Premium, one payment of $4.99, turns the ads off for good. Tonight's board on this page is free to play in your browser.
Is Nightwatch on iPhone?
Not yet. Nightwatch is on Android now, and an iPhone version is coming soon. Tonight's board plays free in any browser, including Safari: it is on this page, the same board the app has tonight.
What time does the new board arrive?
At midnight on your device's clock. The board on this page changes when your date changes, and the line under the board shows how long is left.
Is it the same board for everyone?
Yes. Everyone gets the same board on the same night, so you can send a night to a friend and see who lights the town first.
A new board every night, the same for everyone.
Coming soon to iPhone
Tonight's board plays free in your browser, every night.