Mole rank
Solid basics.
Levels cleared
6+ – 8
Grid
5×5
Color difference
ΔE 3.0–4.0
How to climb
- Hue starts to shift alongside brightness at this stage — look for the tile that feels “off”, not just darker.
- Trust contrast between neighbors: compare tiles in pairs rather than judging each alone.
The next step: Hound
Clear 9 levels in one run to reach Hound. The color difference keeps shrinking — above average color vision.