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Daily Sudoku

One puzzle a day, and every player gets the same one. The puzzle is built from the date itself, so it needs no account and no connection. Finish a day to keep your streak.

The difficulty follows the weekday

The week climbs the technique ladder. A player who returns every day meets every technique the game teaches, in order.

Day	Difficulty	What it asks for
Monday	Easy	Singles only. A gentle start.
Tuesday	Easy	Singles, at a faster pace.
Wednesday	Medium	Pointing pairs and box-line reduction.
Thursday	Medium	Naked and hidden pairs appear.
Friday	Hard	Triples, and the x-wing.
Saturday	Expert	Swordfish and the xy-wing.
Sunday	Evil	Simple colouring. The hardest of the week.

How the streak works

The day is your own local date. A player who travels keeps the days they already earned.
A missed day breaks the daily streak. It does not break the play streak on the statistics page. Those are two different numbers.
Yesterday still counts today, because today is not over yet.
Past days stay playable. A finished day cannot be counted twice.

Every puzzle has one solution

A daily is graded by the techniques it needs, and not by how many numbers were removed. The generator proves each puzzle with a full logical solve, which is also the proof that the solution is unique. There are 7 difficulty labels in all, and the daily uses six of them.