Puzzle JoTJI has 2 solutions but only 1 is accepted :-(

In this puzzle I can play black Qf1 or c1 - the result is equivalent.
The white Queen is pinned and the black Bishop can close the case with an additional check mate.

lichess.org/training/JoTJI

Am I right or am I missing something?

[Originally posted spoiler here, now removed in edit. Better read posting #3]

Hint: Because there is always only one solution, find the differences if you think that two or more moves seem to work. In this case it was the double attack on g2 after the queen moves to f1.

@Irene2015oct said in #4:
> You re right! This is really weird and I think it only works when you do "Qf1" maybe because this comes from a game and from that game whatever the person play in the game,it might become whatever move which happens in the game.

Nope. :-)

@Resurr3ction said in #3:
> Hint: Because there is always only one solution, find the differences if you think that two or more moves seem to work. In this case it was the double attack on g2 after the queen moves to f1.

I see. The Bishop would be hanging in my solution. OK. Thanks. Its hard to make out these little differences :-(

@dirkster99 said in #7:
> I see. The Bishop would be hanging in my solution. OK. Thanks. Its hard to make out these little differences :-(
It's easy to switch on the engine.