fish · hard · 40x40

Reef Fish 40x40 Nonogram

Play Reef Fish 40x40 Nonogram, a 40x40 hard nonogram puzzle.

Difficulty
Hard
Grid
40x40
Category
Fish
reef fishfishhard40x40picrossnonogram
Time 00:00 Progress 0% Ready

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About this puzzle

Reef Fish 40x40 Nonogram sits in the fish theme as a hard 40x40 picross board. 536 of its 1600 squares are filled, so it reads as a fairly balanced grid at roughly 34% coverage. The picture is top-bottom symmetric, so the lower half echoes the rows you work out up top.

The biggest single run here is 33 cells long — fill that first and the surrounding lines fall into place faster. Expect to spend roughly 25 minutes from a blank grid to the finished picture.

How to solve this nonogram

On a large board, divide it into zones: lock in the longest clues, mark proven-empty cells with X, and only then chase the tight lines. With balanced coverage, alternate between filling forced cells and ruling out empties to keep both kinds of clue moving. Spot the symmetry early and you can copy solved sections to the mirrored side instead of re-deriving them. Turn Challenge mode on for instant feedback on mistakes, or leave it off for a calmer solve.

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FAQ

FAQ

What size is Reef Fish 40x40 Nonogram?

Reef Fish 40x40 Nonogram is a 40x40 hard nonogram, so you can expect a longer, more demanding solve.

Does this puzzle save my progress?

Yes. Your moves and timer are saved in the browser after every action, so you can close the tab and come back later without losing anything.

How do I check for mistakes?

Tap Check any time for a manual review, or turn on Challenge mode for immediate feedback as you play.

What do the X marks do?

X marks flag cells you've proved are empty. They don't affect the solution, but they make bigger grids much easier to track.