[Retros] More switchback mates

[afretro]

Dear Nicolas and all,
Here is the latest idea (Reytsen▓s, not mine!) with a rook:
1.Pb2-b3   Pe7-e6   2.Bc1-b2   Ke8-e7   3.Bb2-f6   Ke7-d6   
4.Sb1-c3   Kd6-c5   5.Pb3-b4   Kc5xb4   6.Ra1-b1   Kb4-a3   
7.Rb1xb7   Qd8-e8   8.Sc3-b5   Ka3xa2   9.Rb7xc7   Bf8-a3   
10.Rc7xd7   Ba3-c1   11.Rd7xa7   Ka2-b1   12.Ra7xa8   Bc8-b7   
13.Ra8-a1   
It▓s a pity the rook makes non-thematic captures as well.
I particularly liked Nicolas▓s most recent problem, devoid of non-thematic captures plus showing black bishop Rundlauf. It▓s a work of art, albeit in miniature form.
Mate with a promoted piece as a result of its switchback to the promotion square could be a different line of investigation:
1.Pf2-f4   Pe7-e6   2.Pf4-f5   Qd8-e7   3.Pf5-f6   Qe7-d6   
4.Pf6xg7   Sg8-f6   5.Pg7-g8=S Bf8-g7   6.Sg8-h6   Ke8-e7   
7.Pd2-d3   Rh8-d8   8.Ke1-d2   Bg7-f8   9.Kd2-c3   Sf6-e8   
10.Sh6-g8   
Best,
Andrey