Well actually it is possible...
gxf6 Kh7
Kg5 Kh8
f7 Kh7
f8=Q
3 Moves Mate Puzzle
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Aug 6, 2020
0
#3
Assuming it's Black to move, which is not specified by the OP, it's mate in five as MaxFlaggedYou pointed out. White's mating sequence is significantly longer.
Aug 6, 2020
0
#4
TumpaiTubo wrote:
I can’t do this in my head, but it appears it is black to move, because the Queen is in jeopardy. 1: Qf3, G6 2: Kg7, G5 3: Kxg6, Kh5 4: Qh3++?
It's mate in five with Black to move. Your variation does not work for a couple of reasons. The position reached after 1... Qf3 2. g6 Kg7 3. g5 Kxg6 is a draw by stalemate. Additionally, White's best reply to 2... Kg7 is 3. Kg5 ..., not 3. g5 ...
I couldn't actually find a solution to this puzzle.
The rule is simple:
Mate in 3 moves
It's quite possible with 4 moves, but here 3 moves only...