1. Each number lists a run of filled cells in that row or column, in order, with at least one gap between runs.
2. Click / tap to chisel a cell. Right-click (or ✕ MARK mode) flags cells you know are empty.
3. A wrong strike flashes red, gets auto-flagged, and costs 400 points. Finished lines flag themselves.
4. Keyboard: arrows move, Z/Space chisels, X flags.
5. Every puzzle is solvable by pure logic. The daily block is identical for all carvers; score = 10000 − 8/sec − 400/miss.