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Nonogram

Expert

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Play Expert Nonogram — ThePuzzleLabs

Try this Expert Nonogram puzzle on ThePuzzleLabs.

00:00
Classic
131
212
12
311
13
32
111
232
2121
22
221
13
11
213
1212
1211
12
112
24
231

How to Play — Nonogram

Goal

Fill cells to reveal a hidden pattern. Numbers along each row and column indicate consecutive groups of filled cells.

Clues

A clue like 3 1 means there is a group of 3 filled cells, then at least one empty cell, then 1 filled cell.

Controls

  • Click — Fill or clear a cell (in fill mode)
  • Right-click — Mark a cell with × (definitely empty)
  • T — Toggle between fill and ×-mark mode
  • Arrow keys — Navigate the grid
  • Space / Enter — Fill selected cell
  • X — Mark selected cell with ×
  • U / Ctrl+Z — Undo
  • R — Reset puzzle
  • H — Use a hint

Tips

  • Start with rows/columns where the clue fills most of the line.
  • Use the overlap technique: the region where a group MUST be, regardless of position.
  • Completed clues are automatically struck through.

Reveal Solution?

This will show the complete solution. The puzzle will be marked as "solved with reveal" rather than self-solved.

About expert nonograms

Expert nonograms use 10×10 to 15×15 grids with 40–60% fill and up to 6 clue groups per line. The 15×15 grids are large enough that you can't hold the whole puzzle in your head. You need a systematic approach.

Multi-step deduction chains are the distinguishing feature at this level. Filling one cell triggers a sequence: that cell constrains its crossing line, which resolves another cell, which constrains a third line, and so on. Recognizing when a deduction chain is forming and following it through is what separates expert solvers from hard-level ones.

Disciplined X-marking is critical. On a 15×15 grid, losing track of which cells you've eliminated leads to wasted effort or errors. Mark X on every cell you can prove is empty, every time. The auto-strikethrough on completed lines helps — when a line's clues are crossed out, X-mark everything else in that line.

Expert is the last level before Einstein, which adds logic-only certification. If you can finish expert puzzles without hints, you're ready.