The OPEC Count was simply a way of being able to SEQUENTIALLY count a four-card packet (ala Elmsley Count) without having to shift a card prior to performing an Elmsley Count. It was not designed to be the BASIS of a trick. Many packet tricks, because of the resultant disposition of cards, require gratuitous moves--namely displacements.
There are many REMEDY COUNTS (as I call them) cataloged in COUNTHESAURUS.
Boy, you guys do get technical. Let me repeat: If the 3rd card down in a face-down 4-card packet is reversed, a "regular" EC hides it. The OPEC does the same if the 2nd card down is reversed. That's it. HL.
(So, a "regular" EC shades the 3rd card in a 4-card packet; the OPEC shades the 2nd card. Seems as if that "says" it. No?) HL
I had never heard of this until I purchased Royal Scam. I've only played with it a few times and can not get this to work. Go figure, can palm, pass, and perfect faro on command, but can't do a packet trick that uses this funky Elmsley count!