Out of the ten effects

"You're right

When he shows the card

I tried it with a number of different style boxes and it works as explained

each with a different colored spot on the back

Rider-Waite Readers Tarot Marking System | Neil Tobin - (Download) Duffy Out of the ten effects"Neil Tobin's Rider Waite Readers Tarot Marking System is the best I've seen, and that includes commercially produced marked tarot decks. It took virtually no time to mark a deck using Neil's instructions, and even with my aging eyes, I had no difficulty reading the secret markings from more than a foot away. Five stars! Highly recommended." Richard Webster eBook Turn the most widely recognized tarot deck in the world the plaid backed Rider Waite deck