And just to verify, I popped this image into Photoshop and placed the hand just to the left of each of the A's and B's and read off the RGB values from the "Info" panel.
As expected, for both A tiles, I read R=G=B=139. But for the left hand B tile (the one still on the board, in the shadow) I read R=B=G=139, while for the right hand B tile (the one off to the side) I get R=G=B=139, which is 'obviously' much higher than 139.
Conclusion: You can fool some of the people all of the time, but you can only fool Photoshop some of the time.