- Grid: 15×15
- Filled cells (solution): 109 / 225
- Fill density: 48%
- Longest row hint run: 5
- Longest column hint run: 6
- Average hint groups: rows 3.9 • cols 3.7
Medium Nonograms require more elimination and careful marking. With a 15×15 grid and ~48% filled density, expect to use X-marks to avoid mistakes and resolve overlaps.
- Use overlap + spacing: place a run at its earliest and latest positions and fill the intersection.
- Switch to X-marks aggressively once a line’s runs are placed to lock in empty cells.
- When stuck, pick one line and fully resolve it — Nonograms often unlock in cascades.
- Try today’s other difficulties: Easy · Hard
- Previous days (Medium): Tue, Feb 17 · Mon, Feb 16 · Sun, Feb 15 · Sat, Feb 14 · Fri, Feb 13 · Thu, Feb 12 · Wed, Feb 11
What do the numbers mean?
Each number shows a group of filled cells in that row or column. Multiple numbers mean multiple groups, separated by at least one blank cell.
Is X-mode required?
It’s optional, but it helps a lot. Marking definite blanks prevents accidental fills and makes deductions easier.
Do I need to guess?
No. These puzzles are designed to be solved logically using overlaps, spacing, and elimination.
💡 How to play: Use the numbers above and to the left of the grid to decide which cells to fill. Each number shows how many squares are filled consecutively in that row or column. Use X-mode (Ctrl + left-click or just right-click) to mark cells that must stay empty — it helps eliminate options and avoid mistakes.