In the frame
A spotted grey harbour seal swims between kelp stalks and looks straight at the viewer. Golden kelp leaves frame the right side; the water behind is a soft green haze.
This dive turns the picture into a 4 × 4 slide puzzle: 15 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 seal's spotted face and the golden kelp on the right.
- Save for last: the soft green water in the background. About 14% of the frame has little detail, mostly in the bottom third, and those pieces look alike.
- 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.
- For the last two rows, work column by column, two tiles at a time.
Colours of the picture
Main colours, measured from the picture's pixels: charcoal (39%), sea green (39%), brown (13%) and kelp green (9%).
- charcoal39%
- sea green39%
- brown13%
- kelp green9%
How deep it goes
Depth 3 of 5 — a steady dive.
Wall dives drop off into bigger boards, where the plain parts of a picture start to slow you down.