a) diagram
1.Kf6-f5 Kd3-d4 + 2.Kf5-f4 Kd4-e3 #
b) wLb8-->h2
1.Kf6-g5 Be5-g3 2.Kg5-h4 Bg3-f2 #
c) wKd3-->c4
1.Ba8-e4 Kc4-d5 2.Be4-d3 + Kd5-e6 #
Award: http://bpcf.matplus.net/183One of the problems most difficult to solve, the strategy being thought around the black bishop from e5. The moves are made only by kings and bishops, equally distributing their moves in twins B and C, meanwhile twin A is a royal one.(Judge: Dinu-Ioan Nicula)