Problem 452: S.K.Balasubramanian & Pierre Tritten - Fairy (KoBul Kings, Back to Back) |
![]() ![]() ![]() a) 1.g1B Kb7 2.Bb6+ Kxe4 3.Be3+ Kg6
4.Bd4 Kh6 5.Bg7+ Kxg7(g8=rB)#
b) 1.b1S Ke7 2.Sc3 Kd6 3.Sd5+ Ke4
4.Se3+ Kf2 5.Sg2 Kg2(h2=rS)#
Back-To-Back: When pieces of opposite colors stand back-to-back with each other on the same file (white piece is on the top of black!), they exchange their roles. A pawn on the first rank cannot move. Any piece can make an en passant capture when it has got a role of Pawn.
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 their result is self-check because of the transformation of the Кings according to KoBul rules. 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. |
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Comments
KoBul Kings doesn't seem essential, but is a clever way of motivating the BTB play (both thematic pieces must go to g7/g2).
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