RGB Puzzle

The goal of this puzzle is to clear the board in the minimum number of moves. The board is cleared by forming groups of three matching tiles. Clicking on a tile will change the color of the tile to the next color in the sequence: from red to green to blue and then back to red. If the new tile forms a group of three, the tiles in the group will be removed from the board. The three matching tiles can be in a straight line or form a triangle. If more than one group of three matching tiles is formed, all groups will be removed from the board If there are isolated tiles left on the board which cannot form a group of three (for example if the entire board has been cleared except for one tile), then that tile is stranded and the board cannot be cleared. With practice, it is easy to clear the board every time. The challenge is to clear the board in the minimum number of moves.