Sudoku

A puzzle, not a wager. One daily at each difficulty, the same grid for everyone, timed by the server. Or free play, as many as you like, with a relaxed clock that pauses when you leave.

Daily · today

The daily's clock is the server's and keeps running if you look away.

0:00

Keys: 1 to 9 to fill, arrows to move, Backspace to clear, N for notes, Z or Ctrl Z to undo.

The BirdNo cards, no dice, no house edge. Just you and nine of everything.

Today's easy daily

How it works

Every puzzle has exactly one solution, checked by a solver before you see it. Difficulty is graded by what a person needs to solve it: easy falls to cells with one option left, medium needs the one place a digit can go, hard needs pairs and pointing, expert needs more than that. The daily is built from the UTC date, so everyone gets the same grid at midnight UTC. A hint fills one correct cell; a daily solved with hints stays on your own record and the league board, marked, and stays off the everyone board. Hints on the daily need an account; free play has them for everyone. Solves made before signing in do not go on the everyone board.