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Problem 917: Anatoly Stepochkin - Fairy (KoBul Kings, KoKo, Nightrider)

anatoly.stepochkin(25.10.2018) Miniature with good combination of KoKo and KoBul Kings fairy conditions by Anatoly Stepochkin.

 

 

 

 

 

 

917

 

1.0-0-0+ Nb8 2.Rd7 Nxd7(c8=rR) 3.rRc3 Nb3#
1.0-0 Ke3 2.Rfb8 Nxb8(g8=rR) 3.rRg3 Kf3#
 
 Koko Chess (Contact Chess): a move is legal only if the arrival square is adjacent to any piece, this applies also to the capture of king.
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. Captures are illegal if they result in self-check by the transformed King. Castling is allowed only if the KoBul King is on his initial square in the form of a normal King and if he has not already moved; however he may already have been transformed. 
Nightrider (N): a rider along any straight line of S moves.
 

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