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Problem 521 & 521.1: Valerio Agostini, Antonio Garofalo & Seetharaman Kalyan - Fairy (Kamikaze, NightriderHopper, ContraRookHopper)
valerio.agostiniantonio.garofaloseetharaman.kalyan(04.02.2015) Nice fairy problem with ODT, change of functions and open of lines by Valerio Agostini and Antonio Garofalo.
An update: a version 521.1 with co-author Seetharaman Kalyan is included.
 
 
 
 
521
 
1.CRc5 kBxf6 2.kNHxe4 kRf4#
1.CRc4 kRxf6 2.kNHxd6 kBe7#
 
 
521.v
 
Kamikaze: Pieces disappear from the board when they capture.
ContraRookHopper: Moves like on Rook lines, but only hopping over a hurdle which must be adjacent to the contrahopper and may land anywhere on the line beyond.
NightriderHopper: Hops, on a straight line of knight moves, to the next square beyond any one unit, e.g. NHa1-g4, provided that c2 is vacant and e3 occupied.
 

Comments  

 
0 #1 Seetharaman Kalyan 2015-02-04 14:05
This is a nice problem, but I do not like the capture of the stationary black queen by white.

I also wonder if the nightrider hoppers are really essential to the theme. They are used only to force the black move order. The white pawns d6/e4 can be captured by any kamikaze black piece or pawn and the solution will work.

Here is one possibility without these unwanted features. B1 moves are now pure selfblocks.

H#2
white Pc5d3 Ke7 Rf2
white Kamikaze rf7 bh2
black rlb7 Pa4f4 Ka3
black Kamikaze qb5
(6+5)

1.RLb7-b3 kRf7*f4[-wkRf4]
2.kQb5*c5[-bkQc5] kBh2-d6 #

1.RLb7-b4 kBh2*f4[-wkBf4]
2.kQb5*d3[-bkQd3] kRf7-f3 #
Quote
 
 
+2 #2 Antonio Garofalo 2015-02-11 11:16
An interesting version indeed, many thanks! We would be happy for a joint works if you agree.
Antonio
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0 #3 Seetharaman Kalyan 2015-02-11 17:07
Thanks Antonio. My version was just a suggestion. Basically, this scheme involves selfblocks and mates on the lateral/diagonal which is opened by black/white.

If you have no further suggestions to improve the strategy, you are welcome to publish it as joint effort.
Quote
 
 
0 #4 Diyan Kostadinov 2015-02-19 22:38
The version is now published.
Quote
 

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