It is the first and simplest
sliding block puzzle of the "chameleon" series.
Consisting of just six two-colored square tiles plus one
one-colored one, it proposes two related challenges to
solve. Every tile can slide to an adjacent free space.
Puzzle 1. Change the yellow-blue cube on the red
background into a red-yellow one on the blue background,
as shown at left in the small diagram, Goal 1.
Puzzle 2. Then from the start position (click "Restart"
to get it again) reach a blue-red cube on the yellow
background, as shown at right in the small diagram, Goal
To move a tile, simply click it. Use "Undo" and "Redo"
for the respective backward and forward moves of tiles
along your solution. Once you solve the puzzle, or have
some particular sequence of moves, you can use "Undo"
and "Redo" to check all your moves. Use "Restart" to
start the puzzle over again.