BrainVita PaintBall

This is a one player game. There are a set of paint-balls placed on the board with only the slot in the center left vacant .You have to move one paintball overlapping the next in line, either horizontally or vertically.Diagonal moves are not allowed.As soon as you move a paintball, the one which you skipped over, bursts.Continue moving the paint-balls one at a time, till all the paint-balls disappear leaving only one on the board.The objective of the game is to have only ONE paintball left on the board.