How to play
Read a line’s numbers as runs of filled cells from left to right (or top to bottom), each run separated by at least one empty cell. A “3 1” row holds a run of three, a gap, then a single cell.
Tap a cell to fill it; tap again to clear it. Drag along a row or column to paint a run. Mark cells you know are empty with a cross: switch on “Cross marks”, press and hold, or right-click. Crosses are only notes for you.
A line’s numbers go grey once it matches. “Check” flags any filled cell that does not belong. The puzzle is complete when every filled cell is in the right place — crosses are not needed.
Worth knowing
Start with the big numbers: a run longer than half the line must cover the middle cells whichever way it slides.
When a line is finished, cross out the rest of it. Those crosses then settle the columns that run through them.