
Killer Sudoku (killersudoku.com)
A numbered daily killer sudoku: classic sudoku rules plus dashed cages that must add up to their sums.
139 daily sudoku in your browser, each with a page on how it plays, when it resets and where to play it.

A numbered daily killer sudoku: classic sudoku rules plus dashed cages that must add up to their sums.

Sudoku with cages: every outlined group of squares must add up to its target.

A daily sudoku with no given digits, only dotted cages and their sums.

A dated killer sudoku every day, plus a daily Greater Than sudoku, to play online or print.

A daily sudoku where no digit repeats a knight's move away.

A keyboard-first daily sudoku with a global leaderboard and technique lessons.

A sudoku with dots between cells: white for consecutive digits, black for one double the other.

A sudoku with arrowed sums outside the grid, each giving the total of a diagonal.

A sudoku with lines between two diamonds: the ends differ by at least 4 and the middle stays outside their…

A fresh sudoku every day at five levels, from a 6x6 mini to expert.

A middle-weight classic sudoku from Metro, new each weekday.

Match pairs of hidden numbers on a sudoku grid.

A daily sudoku with thermometers: digits rise from each bulb to its tip.

A daily 6x6 sudoku from LinkedIn, made with Nikoli and a three-time world champion.

A 6x6 sudoku from Singapore's CNA, new every day and sized for a coffee break.

A small daily sudoku from the Daily Mail, solved in minutes.

A free daily 6x6 sudoku: solve it, keep your streak, compare your time.

A 6x6 sudoku a day from the South China Morning Post.

Three classic sudoku grids every day, one easy, one medium and one hard.

Sudoku where squares and circles mark which cells hold odd or even digits.

A sudoku with grey lines whose digits read the same from either end.

A fresh Penny Dell sudoku every day, free on Arkadium.

A sudoku with no printed digits: only white and black dots between squares.

A sudoku with small circles at cell corners listing digits that must appear in the four cells around them.

A daily sudoku whose boxes are nine crooked coloured regions.

A sudoku with lines that cross several boxes, and every box's share of a line adds up to the same total.

A sudoku with grey lines whose digits form a set of consecutive numbers in any order.

A sudoku with an empty grid and digit triples printed around its edges.

Sudoku with chess pieces: fill a 6x6 board so no two pieces of the same kind attack each other.

A sudoku with arrows around the edge showing whether the first three digits of a line rise or fall.

Five overlapping sudoku grids to solve as one, a new set every day.

A sudoku where each row and column clue is the sum between its 1 and its 9.

A sudoku with sums outside the grid: each one totals the digits sandwiched between the 1 and the 9.

A 6x6 sudoku a day: fill every row, column and box with 1 to 6.

A sudoku where each digit is a building's height and edge clues count how many buildings you can see.

A goose-themed daily sudoku.

The Boston Globe's daily sudoku in easy, medium and hard.

Six dated 9x9 sudokus a day, from Very Easy up to Super Hard.

A dated 9x9 sudoku on the Chicago Sun-Times games page, free every day.

The Daily Mail's sudoku of the day, at seven levels of difficulty.

One sudoku a day, easy on Monday and hard on Saturday, against the clock.

A free daily sudoku on Fox News's games page, with difficulty levels and a calendar.

The classic 9x9 number grid, four difficulty levels every day.

Classic 9x9 sudoku on Gridgames, with a new numbered grid each day at four difficulty levels.

One dated sudoku a day, easy one day and hard the next.

Netflix Puzzled's daily sudoku, free on Tudum and in the app.

The New York Post's daily sudoku, in easy, medium and hard, each with a puzzle number.

The NZ Herald's daily sudoku for Premium subscribers.