"Refusal Chess" - my favorite! anyone here play it?

In "refusal chess", when your opponent moves, you can either "accept" it or "refuse" it.  If you "accept" it, the move stands.  If you "refuse" it, the opponent must take the move back and play a different move - and that one you must accept.  This happens every turn.

It leads to wonderfully convoluted positions as players can freely leave a piece en-prise, well, to a point.  It also makes for interesting checkmates when an opponent has only one flight square and you "refuse" it.  It is also common for players to "bait" the opponent into a refusal by playing the second-best move first. The game is described in C.H.O.D. Alexander's "A Book of Chess".

It swept through our club for a while - it's especially fun for speed chess - you can "refuse" the move just by pushing the clock.  Anyone here ever play it?   A few years ago I actually met the guy who invented it back in the 1950s.