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.