In the frame
Dozens of purple sea urchins cover a rocky seabed between tufts of red algae, and an orange sea star lies in the middle. Kelp stalks rise into teal water in the background.
This dive turns the picture into a 3 × 3 slide puzzle: 8 tiles and one empty space. The shuffle is fixed, so everyone starts from the same board, and it is always solvable.
Dive plan
- Start with the easy part: the orange sea star and the purple urchins around it.
- Almost every part of this frame has detail. The least distinct part is the teal water between the kelp stalks, and even that has texture to go on.
- Finish the top row first, then the left column; the puzzle shrinks to a smaller board each time.
- Switch on the numbers if two tiles look alike — they show where each tile belongs.
- The picture is busy enough that neighbouring tiles can usually be told apart without numbers.
- A 3 × 3 board is small enough to solve by feel; try to finish in as few moves as you can.
Colours of the picture
Main colours, measured from the picture's pixels: brown (38%), charcoal (26%), grey (20%) and slate grey (15%).
- brown38%
- charcoal26%
- grey20%
- slate grey15%
How deep it goes
Depth 1 of 5 — a calm paddle.
Snorkel dives are the shallow end of the logbook: small boards with pieces big enough to read at a glance.