An ordinary sudoku, plus signs: each line inside a box bends into a point aimed at the smaller of its two squares. Rows, columns and boxes still hold 1 to 9 exactly once.
About Sumo
Sumo is a free daily greater-than sudoku from Mind Loft, the variant also called inequality sudoku. Each day gives you a 9×9 grid with the usual three rules, rows, columns and 3×3 boxes each holding 1 through 9 once, plus a sign on every edge inside a box saying which of its two squares holds the bigger digit. That is 108 signs, and they carry so much of the puzzle that the board prints almost no digits at all.
The signs are drawn into the grid itself: each line inside a box bends into a small point, and the point always aims at the smaller square, the way a less-than or greater-than sign does. Box borders stay straight. There is no arithmetic, only order. A 1 can only go where every bend around it points in, a 9 only where every bend points out, and a chain of squares stepping down inside a box tells you how high the top of it must be. Every board has a single solution you can always reach by logic, with no guessing. Wrong entries are never flagged, so spotting your own slips is part of the puzzle, and a clean solve scores a perfect 10 with the daily leaderboard decided on the clock.
A new board drops every day at midnight Eastern. Monday prints eight digits, then six, four and two, and Friday prints none; Saturday prints two but needs harder logic, and the Sunday Edition prints nothing but the signs. Sumo also takes its turn as the variant in Enter the Dojo. No app, no signup, play free in your browser. Want the rest of the family? Try Suds, the classic 9×9, Mercury, the thermo sudoku, Polka, the kropki with dots for clues, and Diag, the diagonal sudoku.
Sumo, in short
How do you play Sumo?
An ordinary sudoku plus signs: every line inside a 3x3 box bends into a small point aimed at the smaller of its two squares. Rows, columns and boxes still hold 1 to 9 once, and the signs do so much of the work that the board prints almost no digits.
Is Sumo free to play?
Yes. Sumo is free to play in your browser on Mind Loft, with no app to install and no account required.
When does a new Sumo puzzle come out?
A new Sumo arrives every day at midnight Eastern time, and Sundays bring the Sunday Edition, the biggest or hardest board of the week.
What kind of puzzle is Sumo?
Sumo is a daily sudoku from Mind Loft: the daily greater-than sudoku. It is part of the daily sudoku lineup.
Can I play past Sumo puzzles?
Yes. Every past Sumo board is in the puzzle archive, a tap away by day.
What other daily sudoku does Mind Loft have?
Giant, Rim, Polka and Whittle, among others. The Sudoku page lists every one, with a new board for each every day.