Hara's Diabolical Cube

A diabolically difficult 4x4x4 polycube assembly puzzle. 10 pieces comprise 3 dicubes joined in such a way as to form hexacubes with a central axis of three cubes the 11th is a tetracube (K).
There are three solutions. No report of the puzzle being solved manually has been received to date, except - Yoshikatsu when he designed th puzzle found one of the three solutions. The other solutions were found by computer. Jacques Haubrich has written an excellent piece on this puzzle in CFF (Cubism For Fun) the newsletter of the Dutch Cubist Club (Nederlands Kubus Club).
Ref: Jacques Haubrich, "Hara's Diabolical Cube", CFF 28, April 1992, pp 22-26