Preisrichter Ruud Beugelsdijk: Although I still don't like this kind of guiding problem, and although I still am not convinced of the correctness (though my faith has grown during analysis), I must admit that this deserves a prize. In any case there is a clear "stages strategy" and the solution cannot be called monotonous. All elements are used well and the solution has a fantastic character. This even makes it an attractive problem.
Cook: Nebenlösung in 61 Zügen: 54. Dh6+ Tg7 55. Df4+ Tf7 56. Db4+ Te7 57. d8=T+ Kf7 58. Df4+ Kg6 59. Tg8+ Tg7 60. Df5+ Kh6 61. Dh7+ Txh7# oder 55. d8=D+ Kf7 56. Db4+ Te7 57. Tf5+ Ke6 58. Dd5+ Ke7 59. Tf7+ Ke8 60. Th7 Kf8 61. Dg8+ Txg8#