(30.03.2014) Fairy tanagra by Janos Mikitovics with combination of Swapping Kings and KoBul Kings which ends with Ideal mates.

  a) 1.Kb2 BPd2 2.BHc1 Kd7 3.BHa3 BPc1S! 4.BHxc1(bK=rS) rSc5

5.Kb1 rSb3 6.Ka2(rSb3-Ka2)+ rSxc1(wK=rBH)(rSc1-BHb3)#

  b) 1.Kb1 BPb2(Ke8-Kb1) 2.Ke7 BPa1B! 3.BHd8 Bf6(Kb1-Ke7)

4.BHxf6(bK=rB) rBb4 5.Ka1 rBc3(rBc3-Ka1)+

6.BHb2 rBxb2(wK=rBH)(rBb2-rBHc3)#

Swapping Kings: When the side on-move checks the opposite King, the Kings change places. This is known as the “swap”. A swap is mandatory. The legality of any checking move is evaluated after the swap, except in certain cases involving castling. Castling out-of–check is illegal (wKe1 wRh1 bKe8 bBa5, 1.0-0??). Castling through check is illegal (wKe1 wRh1 bKf8 bBa5, 1.0-0??). Castling into-check is legal (WKe1 WRh1 BKf8 BBa7, 1.0-0!) A King swapped back to its game-array square is considered “reborn” and is eligible to castle.

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. 

Berolina Pawn: moves diagonally, captures straight ahead and promotes normally.

Bishop-Hopper: Hops on Bishop-lines over any one unit (the hurdle) to the next square beyond.