GM Petko A. Petkov!
Original Problems, Julia’s Fairies – 2013 (I): January – April
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No.214 – hs==5 by Petko A. Petkov – A long and difficult play with main actors – Kings and Neutral Locusts! (JV)
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. Сaptures are illegal if their result is self-cheсk 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. In the case of capture by a King in AntiCirce he is reborn on his initial square and may castle. If the capture is by a King which is in the form of some Royal piece, he is reborn on the initial square of that piece.
Locust (L): moves on Q-lines but only by capturing an enemy unit, arriving on the square immediately beyond that unit, which must be vacant.
Nightrider-Locust (LR): Moves like Locust, but on Nightrider-lines only.
Bishop-Locust (LB): Moves like Locust, but on Bishop-lines only.
No.214 Petko A. Petkov
hs==5 2 solutions (5+2+2)
Solution: (click to show/hide)
I. 1.Bg6! Rxg6 (Ka5=rB) 2.rBd2 Rxe6 (rBd2=K) 3.Re1 Re4! 4.nLBxe4-d5 (Ka8=rR) rRd8 5.nLNxd5-b6 (rR= rLB) rLBxb6-a5(Kd2= rLN) ==
II. 1.Bg4! Rxg4 (Ka5=rB) 2.rBc3 Rxa4 (rBd2=K) 3.Rb1 Rf4! 4.nLNxf4-d5 (Ka8=rR) rRa5 5.nLBxd5-c6 (rR= rLN) rLNxc6-e7 (Kc3= rLB)==
Two double stalemate – finals with pinned white Rook and blocked white Pawn . A specific reciprocal play&captures of the two neutral Locusts, which demonstrate considerable mobility. (Tested with WinChloe, the test with Popeye 4,61 gives false results) (Author).