Let's have an 8x8 GRID to be filled with L-trominoes of 3 different colors. 64 squares leave room for 21 trominoes, so there should be 7 trominoes of each color and one empty square. Trominoes of the same color are not allowed to touch side-to-side anywhere. In the presented example, there is an empty square in the position B3; trominoes of the same color touch corner-to-corner in two places marked with red. With the empty square in the B2 position (that is, one row higher), can you fill the grid with L-trominoes, such that trominoes of the same color touch corner-to-corner in only 2 places?