>The CPRNG state machine is not reversible, contrary to what the operational notes claim... >>1. Find the A joker. Move it one card down. (That is, swap it wit

>The CPRNG state machine is not reversible, contrary to what the operational notes claim... >>1. Find the A joker. Move it one card down. (That is, swap it with the card beneath it.) If the joker is the bottom card of the deck, move it just below the top card. (so in reverse: if A is 2nd card you don't know to make it top card or bottom card). This ambiguity could be simply fixed: when you move A down, don't skip the top card, just put it at the top. Similarly for B, count the move from bottom to top as one of the two moves. It seems like you are doing less by not skipping a card, but you do create a new valid configuration, so maybe it does not hurt...