How to play
Classic Sudoku with unstable zones.
- 1Fill every row, column, and box.Each must contain the numbers 1 through 9 once.
- 2Select a cell.Click a square, then press a number key or use the number pad.
- 3Use notes.Turn Notes on to pencil in candidates instead of committing a number.
- 4Stabilize Slop Rush zones.Highlighted 3x3 zones award bonus slop when you complete them cleanly.
You get three mistakes. Use Check when you want a sanity pass, and Notes+ when the grid needs a clean candidate sweep.