Clipboard Note Nonogram (20×20)
This is the Clipboard Note 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
- Normal
- Filled squares
- 200 of 400
- Longest run
- 16
- Typical time
- 45-90 min
- Category
- Music & media
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How this board opens
A first sweep of the overlap rule down the rows and across the columns settles 119 of the 400 cells, about 30%, which is enough of a skeleton to work outwards from. The most generous opening is column 1, which gives up 12 cells on its own. From there the board finishes on row-and-column logic alone — there is no point where you have to try a cell both ways and see which one breaks. The finished picture fills 200 cells, and the longest unbroken run anywhere in the clues is 16.
About this category
Two related shelves sharing one room. On one side are instruments — a harp, an accordion, a marimba, a leather drum, panpipes, a flute, a tambourine, a piano keyboard, a sheet of notation and a single quaver. On the other is the gear that captures and plays things back: a clapperboard, a film reel, a television, a webcam, a security camera, a loudspeaker, a set of VU meters. The two halves look unrelated until you solve a few and notice they fail in the same way.
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