📝Michael Nelson wrote on Sat, Dec 31, 2005 10:16 PM UTC:
Roberto, thank you for your comment. I'm putting the finishing touches
on a ZRF and it will be up later this weekend.
Andy, the restriction was added to prevent check on the opening move,
followed by continuing attacks resulting in a White win in 10 moves or so
in most cases. The current rule for the Pao/Vao moves strengthens the
defense as well as weakening the attack.