cool good plAYING
Countering mate with mate
Nice puzzle and did white use the first pos. or the second?
White used the second. In fact, the game was like this:
In first version 2. ... Rxf2+ is the fastest and most straightforward line, it doesn't work well as a puzzle set up like this. 2nd version is a fine easy puzzle.

This position arose in one of my blitz games. At least two solutions are available, depending on what white moves.
Note: For the first solution, after 2. Rf2, another faster mate would be 2. ... Rxf2 3. Kg1 Qe1#.