Brimstone Black Sulfur Leviathan Cross Nonogram (20×20)
This is the Brimstone Black Sulfur Leviathan Cross nonogram — a 20×20 picture logic puzzle. Use the number clues beside each row and column to work out which squares are filled, and the picture appears as you go. Every square can be deduced; you never have to guess.
About this puzzle
- Size
- 20×20
- Difficulty
- Hard
- Filled squares
- 138 of 400
- Longest run
- 8
- Typical time
- 45-90 min
- Category
- Alchemy
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How this board opens
The overlap rule is stingy here: one sweep of it across every row and column yields 6 of the 400 cells, 2%, so most of this board has to be argued for rather than read off. The most generous opening is row 9, which gives up 4 cells on its own. Straight line logic carries it to 6 cells and then stalls, so the last 394 need cross-referencing between a row and a column that share a cell. The finished picture fills 138 cells, and the longest unbroken run anywhere in the clues is 8.
About this category
Symbols, vials, and half-finished experiments — the alchemy set leans into the visual clutter of a wizard's workbench, which turns out to be a good fit for nonograms: lots of small internal detail means real clue interplay between rows and columns, not just one big blocky silhouette. Most of the set sits at 15×15, the size where cross-referencing actually starts to matter, with a couple of full 20×20 boards for anyone who wants a longer sit-down solve and a few 10×10s at the gentler end.
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