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Dive 86 · Blue Edge

A spiral of trevally

A dense spiralling school of silver fish beside a reef wall in deep blue water

Filling the tank…

In the frame

Hundreds of silver trevally swim in a tight spiral that narrows towards the bottom like a funnel. A dark reef wall rises on the left, and the rest of the frame is deep blue.

This dive leaves all 15 tiles of a 5 × 3 board in place but rotates them by 90, 180 or 270 degrees. Tap each tile until the whole picture stands upright.

Dive plan

  1. Start with the easy part: the silver school and its curved outline.
  2. Save for last: the deep blue water around the school. About 40% of the frame has little detail, mostly on the right side, and those pieces look alike.
  3. Each tap turns a tile a quarter clockwise; right-click or Shift+Enter turns it back.
  4. Start with tiles that contain a horizon, a body or a straight edge — their upright position is obvious.
  5. For plain tiles, follow the light: water and sky usually get brighter towards the top of the picture.
  6. Plain tiles can look right at two angles; check the direction of the light and the texture.

Colours of the picture

Main colours, measured from the picture's pixels: ocean blue (40%), deep blue (37%) and sky blue (24%).

  • ocean blue40%
  • deep blue37%
  • sky blue24%

How deep it goes

Depth 4 of 5 — a demanding dive.

Wall dives drop off into bigger boards, where the plain parts of a picture start to slow you down.