> FWIW, when my daughter and I were playing a bunch of Tic Tac Doh (it was a fine thing to do while waiting for dinner to arrive at the local Family Friendly Restaurant) we noticed the problem with opaques and played a simple variant based on the principle "if you can't see it, it doesn't exist" in which a nest is considered indistinguishable from a single pyramid of the outermost size. Seemed to work, anyway.
Which is exactly what the rules on the Tic-Tac-Doh card from ICE-7 states. I'm inclined to say (given ICE-7 is the published version) that the wiki is wrong in omitting this. Timothy