It is great idea for an ability level. It is a pity that if R arrives first, he doesn't block the win so R can still winning. I would rate with five stars if R blocks the path... Anyway it is a nice level, thanks!
Well, a good tip, I didn't even try if I can still reach the goal if R was first, so I never found that "mistake"... I modified it a little bit and posted it as "R vs B Mk2". Thanks for your response!