Gary Gifford wrote on Mon, Nov 6, 2006 12:40 PM UTC:
I thank Mats for bringing the very important PASS issue into view. It
seems 3 different Pass rules have been unearthed. The first 2 of the pass
rules are to prevent the King from moving into check:
1) Stewart Culin's - Requires King only piece on board before pass is
allowed.
2) Roleigh Martin's - Other pieces allowed on board, but if they can move
legally, you still can't pass
3)Other Rule - you can pass anytime
Personally, # 2 above, seems the most logical to me.