Every mode fills a 9×9 grid with digits 1–9 so no row or column repeats a number. Each of the 3 modes adds its own extra rule — pick one from the mode-select screen.

The grid is divided into bold-outlined cages. The small number and symbol in a cage's corner tell you the target and the operation (+, −, ×, ÷) its cells must combine to reach — in any order.

Classic Sudoku rules apply to rows, columns, and 3×3 boxes. On top of that, a small dot marks every pair of neighboring cells whose final digits are consecutive (like 4 and 5). Two neighboring cells with no dot between them can never end up consecutive.

Classic Sudoku rules apply to rows, columns, and 3×3 boxes. Every arrow's circled cell must equal the sum of all the digits sitting along the line the arrow draws through the grid.

Tap the pencil button or press P to jot candidate notes in a cell instead of placing a final answer.