Symbols · Hard · 50x50
Anchor 50x50 Nonogram
Play Anchor 50x50 Nonogram, a 50x50 hard nonogram puzzle.
Playsymbols · hard · 40x40
Key 40x40 Nonogram
Play Key 40x40 Nonogram, a 40x40 hard nonogram puzzle.
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Nonograms.pics
Key 40x40 Nonogram
Hard · 40x40 · Symbol
0
0
6
8
10
11
12
13
14
15
15
12
13
314
24
24
23
24
24
24
24
23
23
23
25
25
813
612
612
612
713
21
19
19
17
13
11
3
0
0
0
0
3
11
13
17
19
19
21
137
126
126
126
138
25
25
23
23
23
24
24
24
25
25
24
24
153
15
15
13
14
14
13
9
9
9
8
6
0
0
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Scan the QR code or open https://nonograms.pics/puzzle/symbols-key-040/ to play this nonogram in your browser, check your progress, and save your solve.
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About this puzzle
Key 40x40 Nonogram is a hard 40x40 picture nonogram from the symbol collection. Coverage sits near 39% (630 of 1600 cells), giving you a fairly balanced picture to uncover.
Its longest clue runs to 25 cells, so anchoring that block early gives you a reliable foothold. Most solvers clear a board like this in around 25 minutes.
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. Use Check whenever you want to confirm progress, and switch on Challenge mode if you prefer catching errors as they happen.
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PlayFAQ
FAQ
What size is Key 40x40 Nonogram?
Key 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.