Fairy chess composition

# No.866 (VC&EH)

 No.866  Vlaicu Crişan & Eric Huber(Romania) Original Problems, Julia’s Fairies – 2015 (II): July – December    →Previous ; →Next ; →List 2015(II) Please send your original fairy problems to: julia@juliasfairies.com

No.866 by Vlaicu Crişan & Eric Huber – Reciprocal battery creation in an excellent Meredith position (Black Rex solus in the beginning)! (JV)

Definition:

Half-neutral piece: Piece which can exist in black, white or neutral state and changes its state by the rules:

• A piece in the neutral state may be moved by Black or White, and after move it changes into black or white state respectively.
• A piece in the white state may be moved only by White, and after move it changes into its neutral state.
• A piece in the black state may be moved only by Black, and after move it changes into its neutral state.
• Only a half-neutral pawn can promote into half-neutral figure.

• Castling with half-neutral King is possible with hK in white phase on e1 (White castling) and hK in black phase on e8 (Black castling). After castling the hK becomes half-neutral phase and can become mate.
• A play is possible also with only one half-neutral King on the board (in white, black or neutral phase).
• By the notation: “h”=half-neutral piece, states are marked with “w”(white), “b”(black) and “n”(neutral).

 No.866 Vlaicu Crişan &Eric HuberRomaniaoriginal – 13.08.2015 Solutions: (click to show/hide) White Ke4 Qc8 Sf8 Sa6 Pg5 Pb3 Pe3 Pd2 Black Kd6 White HalfNeutral Rf5 Bc4 ser-s#6          b) Ke4→d4       (10+1)Half-neutral Rf5, Bc4 a) 1.Sf8-g6 2.hRf5-f8=n {} 3.hBc4-f7=n {} 4.Ke4-f5 { } 5.e3-e4 6.Qc8-e6 + nhBf7*e6=b # b) wKe4-->d4 1.Sa6-b4 2.hBc4-a6=n {} 3.hRf5-b5=n {} 4.Kd4-c4 { } 5.d2-d4 6.Qc8-c5 + nhRb5*c5=b # { (C+ by Popeye 4.69)} Orthogonal-diagonal correspondence, battery creation. A different piece plays at each move. (Authors)

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