By rotating the discs, the balls and the gap are moved around to the other columns. Other related puzzles are the Whip-It Tower , and Missing Link . However the colours are equivalent, meaning that it does not matter which colour goes in which column. Start by pushing in one of the balls to create a gap. Find a ball that belongs in the disc but which is not in the correct position.
Shift balls down to get the gap in one of the discs above the ball.
Rotate discs to place the gap above the ball in the same column. Shift the ball up. Rotate the ball to a different column and drop another ball in the gap. Rotate a disc to place the gap in a different column to the ball. Rotate discs to place the gap beneath the ball.