Mate in 2

On g5, White’s queen is like a dam, restraining three black pieces at once — Rg7, Bh6, and Rh5. With the key 1.Qf6!, the barrier is lifted and all three are freed. The threat is 2.Qf3#, which Black seeks to parry by using the newly opened lines, producing the following variations:

1...Rxc5+ 2.Nxc5#
1...Bxd2+ 2.Nxd2#
1...Rf5 2.Qd4#
1...Rxg3 2.Nxg3#
1...Be3 2.Rxe3#
1...Bf4 2.Qxf4#

The Belgrade Internet Tourney 2017 required the key move to open lines for black pieces. This two-mover met the challenge with luminous clarity, letting Black exploit the opened lines in as many as six variations — enough to convince judge Marjan Kovačević to award it the top honour.