Mind LoftSudoku
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Free online sudoku

Free Daily Sudoku: Nine Variants, One New Board Every Day

Classic 9x9, a two-minute 6x6, and seven variant sudokus you will not find together anywhere else: jigsaw, killer, sandwich, thermo, kropki, anti-knight and skyscrapers. Every board has one solution you can reach by logic alone, never a guess. No app, no signup, and a leaderboard decided on the clock.

Play today's Sixes Run the Sudoku circuit
9games
1new board a day, each
0signups needed

Pick a puzzle

9
Mini sudoku, 6x6Sixes The daily mini sudokuA 6x6 sudoku in six boxes two squares tall and three wide. Every row, column and box holds 1 to 6 exactly once. The short one: about two minutes, nothing counts against you, and the clock decides the day.Classic sudoku, 9x9Suds The daily sudokuFill the nine by nine grid so every row, column, and box holds one through nine exactly once.Jigsaw sudokuQuilt Sudoku with no straight linesThe nine boxes have been redrawn into nine crooked regions. Every row, column and region still holds one through nine exactly once.SkyscrapersTowers Count the towers in viewSkyscrapers: every row and column holds each tower height once, and each border clue counts the towers visible from there, taller ones hiding shorter ones. 5x5 weekdays, 7x7 Sundays, nothing counted against you, the clock decides the day.Thermo sudokuMercury The daily thermo sudokuThermo sudoku: digits get bigger along every thermometer from its round bulb, and the ordering does the work no sums are asked to do. Sundays print just eight digits under nine thermometers.Sandwich sudokuSando The daily sandwich sudokuSandwich sudoku: the number beside each row and column is the total of the digits lying between that line’s 1 and its 9. Find those two and the grid falls out.Anti-knight sudokuKnight The daily anti-knight sudokuAn ordinary sudoku plus one rule: a digit may not repeat anywhere a chess knight could jump to it, two squares one way and one square across. Nothing is drawn on the grid, the rule reaches across boxes instead of inside them, and the board prints far fewer digits than a sudoku usually needs.Killer sudokuCages The daily killer sudokuKiller sudoku: not one digit is printed. The grid is cut into cages labelled with the total of the digits inside them, and those totals are the whole clue set.Kropki sudokuPolka No numbers, only dotsKropki sudoku: not one digit is printed. A white dot means the neighbours differ by 1, a black dot means one is double the other, and no dot means neither, so the silences are clues too.

How to play sudoku

Fill the grid so that every row, every column and every box contains each digit exactly once. That is the whole rule. The skill is in reading what the printed clues force: a square where only one digit can go (a naked single), a digit that has only one square left in a house (a hidden single), and further up, pairs and locked candidates.

Every Mind Loft board is checked before it ships so that the full solution is reachable by those techniques alone. If you find yourself guessing, there is a deduction you have not spotted yet, and the notes tool is the way to find it.

Which variant should I start with?

Sixes if you have two minutes. Suds if you want the classic. Quilt is the gentlest step into variants because the rules do not change, only the shape of the boxes. Cages and Sando add arithmetic, Mercury and Polka add ordering, and Knight and Towers change what sees what.

The week

MondayThe most printed clues of the week. Singles only.
Wednesday to FridayFewer clues; locked candidates and pairs start to appear.
SaturdayThe hardest weekday board.
Sunday EditionBigger or sparser: a 7x7 Towers, a Mercury with eight printed digits, a Sando with six, a Knight with thirteen.

Questions

Is it really free, with no signup?

Yes. Every board is free in the browser. Signing up only puts your name on the leaderboard and keeps your streak across devices.

Can I play yesterday’s puzzle?

Every past board is in the puzzle archive, unscored, so you can practice a variant before the day’s board counts.

What is the Sudoku circuit?

Five of the nine sudokus, rotating one a day, played as one run with one combined leaderboard.

Do the puzzles ever need a guess?

No. Each board is proved to have exactly one solution and to fall to logic. Two independent solvers check every bank before it goes live.