The app for iPhone and Android
Daily Hiku, 50 levels that teach you the tricks, and a home-screen widget. No ads, no account. Playable with VoiceOver, a screen reader or the keyboard alone.
Learn Hiku with ChatGPT
Open today's boards right in the conversation and play with a partner who sees the board. Ask why a move is a trap, get a hint when you're stuck, or have it show you the solution move by move.
YouWhy can't I move the 1 on E1 down onto E2?
ChatGPTBoth 1s would vanish, and the 3 on E5 would be left on its own: no other number in row 5 or column E can reach it.
The Hiku school
Why was that number left behind? Seven short lessons show you the patterns behind the traps, on small boards you play yourself, with a test at the end.
For news sites and publishers
Embed Daily Hiku on your site for free with two lines of code.
How to play Hiku
Numbers jump and subtract. The rules take a minute to learn; the boards may take longer.
The mathematics of Hiku
Why some moves make a board impossible, explained with parity and equal sums.