2018 Olympiad in Batumi

108 mate puzzles from the event 

Black mates in 3.

Peter Kirby vs Sasith Piyumantha

Removing the Guard

Solution (in reverse)

Rd1+ 2.Nxc1 1...Qxc1+

White mates in 4.

Cecil Moncur vs Guy Esungi

Overloading

Solution (in reverse)

2.Qxh7+ 1...Rxf2 if or 

2.Rbh4 1...Ra8 if 

1.Rb4