Why will my disc not move?

The other peg is full, or its top disc is not the same colour and one shade lighter.

Do the numbers on the discs matter?

Yes. They show the shade, from 1 for the lightest. A tower has them in order from 1 at the bottom.

Move coloured discs between pegs and build each colour into a tower from the lightest shade at the bottom to the darkest on top.

Stack Hue Sort

0% · Getting ready

A real run of the game, recorded with captions and no sound.

Each colour has discs from the lightest shade, 1, up to the darkest. Every peg holds a stack of discs.
Tap a peg, then another. The top disc moves across if the other peg is empty, or if its top disc is the same colour and exactly one shade lighter.
Build every colour into one tower, lightest at the bottom and darkest on top, to win.
Each puzzle shows the fewest moves. If no move can ever finish it, the puzzle is stuck. Undo and Restart are always available.

Controls: mouse or touch. Made by CalcoTools.

Free the lightest discs first. Every tower starts with shade 1 on the bottom.
Use the empty peg to park a disc that is in the way.
A disc can only go on one shade lighter of its own colour, so plan the order shade 1, 2, 3.
Look at what is under a disc before you move it.

Why will my disc not move?: The other peg is full, or its top disc is not the same colour and one shade lighter.
Do the numbers on the discs matter?: Yes. They show the shade, from 1 for the lightest. A tower has them in order from 1 at the bottom.
Is the daily the same for everyone?: Yes, on the same UTC day.