Nonocross Level 18 is a 7×7 nonogram with the answer NINJA. The completed grid contains 38 filled cells out of 49 total — a dense puzzle (78%). With most cells filled, the empty gaps are the key constraint — trace them carefully.
The puzzle is part of the Levels 1–60 range on the Nonocross Answers hub. Each number in a clue line represents one consecutive run of filled cells; runs are separated by at least one empty cell. The visual grid below shows the verified solution — the clue reference lists every row and column clue so you can cross-check your own attempt. Continue to Level 19 when ready.