The daily board
is a battle of minds.
Every day, one shared puzzle for the whole world. Solve it against a rival’s “echo”, challenge a friend with a short code, and share your result without spoiling the solution.
Got a challenge code? Open Sortlock, go to the Daily board and tap Echo to type the 6 characters.
The rival ghost shows how they figured it out — beat the echo in fewer moves.
How the daily works
No real-time servers — just one deterministic board and asynchronous echo duels.
One board for everyone
A single puzzle is generated from the UTC date, so every player in the world solves the exact same board each day.
Duel a rival echo
Your opponent is a recorded "ghost" of another player, matched to your skill. It replays their moves so you can see how they reasoned — beat it in fewer moves.
Challenge a friend
Send a friend a 6-character code (valid for 24 hours). They type it in to duel your exact echo on today’s board.
Share, spoiler-free
A result card shows your stars, moves and time as coloured blocks — never the solution. Brag without ruining the puzzle for anyone.
Share the result, not the answer
After you solve the daily, Sortlock renders a clean card: your star rating, move count and time, plus a coloured efficiency bar for you and the echo. Colours convey how well you did — never where the balls go.
- Shareable as an image, with a link back here
- Win/lose verdict against your rival’s echo
- Never reveals the board’s solution
Play today’s board
Sortlock is coming soon to iOS, Android, macOS and Windows. The daily board and echo duels come built-in.