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How about, if a player uses a piece to escape check then the piece is returned to its original owner for placement at their very next turn as that turn, otherwise the imposting King can keep the piece and use it again?
(kaŝi) Se vi bezonas malnovan mesaĝon de elektita uzanto, klaku ties karakteristikon kaj uzu la ligilon "montri mesaĝojn de ĉitiu uzanto" supre en la paĝo. (konec) (Montri ĉiujn konsilojn)