Killer sudoku. Fill the grid so every row, column, and 2×3 box holds the digits 1 to 6, using only the cage totals: no digit is printed to start you off.
About Coop
Coop is a free daily killer sudoku from Mind Loft on a small 6×6 grid, in six boxes two squares tall and three wide. Every row, column and box holds 1 to 6 exactly once, and not one digit is printed. The grid is cut into cages labelled with the total of their squares, and a digit never repeats inside a cage.
It is the quick version of Cages: the same idea in a few minutes. Every board has exactly one solution you can always reach by logic, with no guessing, and boards get harder through the week, with a harder Sunday Edition.
A new board drops every day at midnight Eastern. No app, no signup, play free in your browser. Want the full-size version? Try Cages, or Sixes, the plain 6×6.
Coop, in short
How do you play Coop?
The 6x6 twin of Cages: no digits printed, only cage totals. One logical solution, a new board every day.
Is Coop free to play?
Yes. Coop is free to play in your browser on Mind Loft, with no app to install and no account required.
When does a new Coop puzzle come out?
A new Coop 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 Coop?
Coop is a daily sudoku from Mind Loft: cages at 6x6. It is part of the daily sudoku lineup.
Can I play past Coop puzzles?
Yes. Every past Coop board is in the puzzle archive, a tap away by day.
What other daily sudoku does Mind Loft have?
Sando, Snack, Sixes and SixesToo, among others. The Sudoku page lists every one, with a new board for each every day.