Today’s Sudoku
One grid, the same for everyone, generated from today’s date rather than handed out by a server. Two people on opposite sides of the world open this page and see the same clues.
It can be solved by reasoning alone
This is the part that matters most, and it is not true of every Sudoku you will meet elsewhere. Plenty of puzzles labelled “hard” or “expert” reach a point where no amount of looking will help — the only way on is to pick a cell, guess, and discover twenty moves later whether it worked.
For a shared daily that is fatal. A player who guessed right is not better than a player who guessed wrong, and a leaderboard over a puzzle like that ranks luck.
So today’s grid was built by removing digits from a completed one only while what remained could still be solved by deduction — naked singles, hidden singles and locked candidates, and nothing beyond them. It was dealt only because a checking solver finished it using nothing else.
Two guarantees follow. There is exactly one answer, since every digit the checker placed was forced rather than chosen. And whenever you are stuck, there is something on the grid that can be proved — you are looking for it, not gambling on it.
How it is scored
Time, and only time.
Every other game here ranks on moves or cards cleared, because those measure a decision. Sudoku has no such choice: every solver writes the same eighty-one digits in the end, and the only thing separating two people is how long the deduction took them. Counting entries would rank a quick thinker below someone who typed carefully.
The daily grid is a shorter one
The daily starts with about forty clues, leaving roughly forty cells to fill. That is a gentler grid than a Sudoku enthusiast might pick for a quiet evening, and it is deliberate: this one sits alongside five other games, and a puzzle that reliably takes a quarter of an hour is one most people end up skipping. Around five minutes is a comfortable solve.
If you came here for a proper Sudoku, free play deals the full-length version — down in the low twenties of clues, still guaranteed solvable by reasoning, and as many of them as you like.
There is no penalty for stopping. A half-finished grid is not recorded as a result — the puzzle simply waits, saved exactly as you left it, and you can come back to it later the same day. Clashing digits are marked as you go, though a grid with no clashes can still be wrong.
The streak
Finishing this keeps your site-wide streak alive, and so does finishing any other daily on the site. The streak asks for one puzzle, not all of them, so whichever game suits the time you have is the right one to play.
Every past grid stays playable in the archive, since each one regenerates from its own date.
New to the deduction, or stuck in the same place every time? The Sudoku strategy guide explains hidden singles and locked candidates, and sits above unlimited practice grids.