32 Personaggi e 1 Autore, 1955
12+12. Black to move. Ortho-Reconstruction (i.e. reach the same position with White to move in the shortest number of moves.)
Solution: Bl. can only move his Rook back and forth e5-f5. The wh. Knight must interpose on d4 so that bRd5 becomes possible. The whole maneuver takes 43 double moves !
1. Re5 Nb2 2.-20. Rf5 Nd1-f2-h1-g3-h5-g7-e8-d6-f7-h8-g6-f8-d7-b8-a6-b4-a2-c1-b3 21. Rd5+! Nd4 22. Re5!! Nb3 (the wN takes the trip backward) 23.-42. ... 43. Rf5 and we are done.