Originally Posted by Coyote
So, would you guys say there is a difference in the ease of use between Zen and Mentor? Seems to me that if I'm going to go with 2DTC I might as well go with Mentor.
They're nearly identical in difficulty, from my experience.
In favor of Zen: you can ignore all 9s.
In favor of Mentor: 3 has weight 2 and 9 has weight -1, which means that more 2-card hands cancel - or at least they do in my head - because you have the same number of +2 cards as -2 cards in the deck, as well as an equal weight of -1 and + 1 cards.
Whenever I play with another count and come back to Mentor, I see cancellations all over the place.
Halves or Zen tags with a 2DTC conversion would be an awesome system.