|
No.782 |
Original Problems, Julia’s Fairies – 2015 (I): January – June →Previous ; →Next ; →List 2015(I) Please send your original fairy problems to: julia@juliasfairies.com |
No.782 by Alberto Armeni & Vito Rallo – AUW in a joint play of Orphan and Imitator (not supported in Popeye)! But if the creation of twin d) is legal?(JV)
Definitions:
Imitator (I): Every time a piece moves an Imitator (or a set of Imitators) moves simultaneously in an identical manner. An Imitator cannot move of itself. If an Imitator cannot imitate the move of a piece, the move is illegal. An Imitator may only pass through or enter an unoccupied square and cannot move off the board. Castling is imitated by decomposing into a King move followed by a Rook move.
Orphan (O): An orphan can move only when observed by an enemy piece; when so observed it can move like the observing piece(s).
|
No.782 Alberto Armeni & |
Solutions: (click to show/hide) |
|
White Oe2 Kg7
Black Kh5 Pb7 Pe6 Pf5 Pg3 Pc2
Neutral Ib2
h#2 (2+6+1i) |
Interesting use of the orphan and imitator. The motivation for underpromotions to B/R is good. Julia, why do you think that twin (d) is not ok? It is similar to twin c.
Yes, twin d) is from c), but in fact it is Oe2->d2 + Od2->g1 => Oe2->g1.
Yes. Progressive twins are usual and that is how they are formed.