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Chess Problem 2003c6a501

BDS

Rochade Europa, 2003

#5
KANGAROOs a1; b8 

1.Ra2! ()

1...b4  2.a4+ Ka6 3.a5+ Ka7 4.a6+ Ka8 5.a7#
1...Ka6 2.a4     (3.axb5#)
              b4  3.a5+ Ka7 4.a6+ Ka8 5.a7#

Composed for a Kangaroo theme tourney where it was bounced by the judge, presumably for the flight-taking key. The second variation, so close an echo of the first, is unfortunate, but the flight on a6 is needed for the idea to function.

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