Original Problems, Julia’s Fairies – 2014 (I): January – April
Please send your original fairy problems to: email@example.com
No.480 by Nicolas Dupont – A difficult PG problem with a Back Home fairy condition, invented by author! The problem will participate in the Tournament for Retro and PG problems published at Julia’s Fairies in 2013 – 2014. (JV)
Definition sent by author:
a) If a piece can legally move to the square it occupied in the initial position of the problem, it must move to this back-home square.
b) Back-home moves are prevalent to the virtual capture of the opponent King by any piece, i.e. “checks are fairies”.
c) If several back-home moves are legal, the side-on-move chooses which one to play.
d) The back-home square of a Pawn which is promoted during the solution is the initial square of this Pawn.
See the link http://juliasfairies.com/articles/back-home-fcondition-ndupont/ for more details on the back-home fairy condition.
No.480 Nicolas Dupont
Dedicated to Jacques Dupin
PG 21,5 (15+15)
Solution: (click to show/hide)
1.f2-f4 e7-e5 2.f4-f5 Qd8-g5 3.f5-f6 c7-c6 4.Sg1-h3 Qg5-h4 + 5.Sh3-f2 Qh4-c4 6.Sf2-e4 Ke8-d8 7.Se4-d6 Kd8-c7 8.Sd6-f5 Bf8-c5 9.Sf5-e7 d7-d6 10.Se7-g6 h7-h5 11.Sg6-f8 Rh8-h6 12.Sf8-h7 Rh6-g6 13.Sh7-f8 Bc8-e6 14.Sf8-d7 Be6-d5 15.Sd7-b6 a7-a5 16.Sb6-c8 Ra8-a6 17.Sc8-a7 Ra6-b6 18.f6xg7 Sb8-a6 19.Sa7-b5 + Kc7-b8 20.Sb5-d4 Rg6xg7 21.Sd4-f3 Sg8-e7 22.Sf3-g1
Thematic content: The white side is entirely home-based while no black officer is standing on its initial square. Capture-free circuit of 18 moves (over 22!) by the white Knight g1.