In the frame
A large grey manatee grazes head-down on a green seagrass bed, its wrinkled back marked by ripples of sunlight. Its broad paddle tail reaches the right edge, and a few small fish swim beneath it.
This dive cuts the picture into 15 square tiles on a 5 × 3 board and shuffles them. Swap two tiles at a time until the picture is whole; tiles that reach their home spot lock.
Dive plan
- Start with the easy part: the manatee's head and wrinkled back.
- Save for last: the clear water. About 21% of the frame has little detail, mostly in the top third, and those pieces look alike.
- Swap each tile straight to its home spot; it locks there, and the tile you displaced is the next one to place.
- If every swap sends a tile home, 14 swaps or fewer finish all 15 tiles.
- Most tiles here hold a recognisable feature, so find their spots by comparing them with the preview.
- Fix the corners first: they are the easiest tiles to place by eye.
Colours of the picture
Main colours, measured from the picture's pixels: kelp green (34%), slate grey (23%), sea green (17%) and grey (14%).
- kelp green34%
- slate grey23%
- sea green17%
- grey14%
- charcoal12%
How deep it goes
Depth 2 of 5 — an easy dive.
Reef dives sit in the middle: enough pieces to need a plan, never so many that a phone screen feels crowded.