To make it absolutely clear, this event allows a player to give back pieces (in their unpromoted form) to his opponent in exchange for a tempo. Ever needed just one extra tempo to make an awesome idea work - this is the event for it. Definitely my style of event 😁
I suspect this event would not work for event chess, but in the midst of a tight chu shogi middlegame, such an option is more than welcome.
Event Type: tempo change; resurrection
Requirement(s): none