Julia's Fairies

No.866 (VC&EH)


Vlaicu Crişan & Eric Huber


Original Problems, Julia’s Fairies – 2015 (II): July – December

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


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.

Additional features of half-neutral pieces:

  • 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 Huber


original – 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

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