O.k I got it. I was try'n too hard. See at one part of the tutorial about the train sensors it say's when the red guard comes don't stop moving and when the blue guard comes don't move at all. What they failed to tell me or I failed to remember is, the sensors don't work on the top of the train so when the guards come just be on top of the train and you won't be detected.

Now can someone please explain this card game to me?