(11.04.2013) Join version of problem n.160 by Velko Alexandrov and Themis Argirakopoulos.

a) 1.Sb8+ cxb8Q(bK=rS)+ 2.rSa1 Qxa7(brS=rB)#

b) 1.Bb8 cxb8Q(bK=rB)+ 2.rBg8 Qxf8(brB=rS)# 

KoBul Kings: When a piece (not a pawn) of his own side is captured, a King transforms into a Royal piece of the same type as the captured one. When the King is in the form of any Royal piece and there is a capture of one of the pawns of his own side, he becomes a normal King again.