No. 2813 - A. Shitov
12+16. Least number of retromoves without capture or pawn move?
30+0. Colour the pieces, and mate in 1
15+13. Black just picked up a piece to play his 16th move. How did the game go?
8+11. Retract 7 white moves and 6 black moves, and mate in 1 (Proca retractor)