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No.758 |
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.758 by Geoff Foster – A neutral King in a Back-To-Back problem! (JV)
Definition:
Back-To-Back: When pieces of opposite colors stand back-to-back with each other on the same file (white piece is on the top of black!), they exchange their roles. A pawn on the first rank cannot move. Any piece can make an en passant capture when it has got a role of Pawn by Back-To-Back.
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No.758 Geoff Foster |
Solutions: (click to show/hide) |
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Neutral Kf7 Pc5 Pe7
h#2,5 2 solutions (0+0+3) |
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Another way to solve the riddle “how to mate a neutral king with a neutral, without giving self-check”! The mating neutral must move differently for White and Black, and here BTB takes care of that.
I like it. Strangely, with all units neutral, seems like a series self-mate overall, but it really isn’t since the on/off of Black/White turn influence is used.