Both f4 and h4 are threatened and black can only stop one of them. Furthermore, after f4, black's Q has no check and the diagonal is also blocked. Took me a few minutes to find it.
h4 loses immediately! That is what my opponent played in the game. Black now has a checkmate threatened. MOVE ORDER MATTERS HERE. F4 must be played first, THEN and only then H4.
But good job!!! 
The beauty of this puzzle is that MOVE ORDER MATTERS. If you play h4, BLACK wins...checkmate is being threatened on g2, after gxh3. A beginner might make this mistake.
f4 !!!!! is the CORRECT starting move, then after gxf3....h4 will force mate for white. SO the move order matters, again.
Yureesystem and IM pfren got the answer correct. It is a good puzzle for the advanced beginner.
Both f4 and h4 are threatened and black can only stop one of them. Furthermore, after f4, black's Q has no check and the diagonal is also blocked. Took me a few minutes to find it.
h4 loses immediately! That is what my opponent played in the game. Black now has a checkmate threatened. MOVE ORDER MATTERS HERE. F4 must be played first, THEN and only then H4.
But good job!!!>>
Pity your English comprehension and logic aren't so good. I thought I was quite clear.
I said good job dude.....I was just making sure you saw that the move order mattered. I read you said the diagonal is blocked, which led me to say good job
Actually, my opponent played h4 (under time pressure) and he was very sad when he lost.
I think you missed my point. You berated @Cubronzo for getting the wrong answer and went on to brag about your ratings (to demonstrate your superiority?) when 1) you blundered into a mate in 3, and 2) your "high rated" opponent (who spent a minute on the move and had 2 minutes remaining) missed the mate in 3. Still do not see the irony?
I am sorry, perhaps I should have been more kind to him. He just seemed so confident with his "Krushing" Rb8 move (laughs) that I had to berate him.
Irony!!!!!!!
Actually, my opponent played h4 (under time pressure) and he was very sad when he lost.
I think you missed my point. You berated @Cubronzo for getting the wrong answer and went on to brag about your ratings (to demonstrate your superiority?) when 1) you blundered into a mate in 3, and 2) your "high rated" opponent (who spent a minute on the move and had 2 minutes remaining) missed the mate in 3. Still do not see the irony?
I am sorry, perhaps I should have been more kind to him. He just seemed so confident with "Krushing" Rb8 move (laughs) that I had to berate him.
Irony!!!!!!!
Yet.....I won the game. My opponent blundered with the move h4 (again under time pressure).
I see you deleted the claim that you had 1 minute and he had 30 seconds. Since you pointed us to the game in question, both of those statements are easily refuted:
All I remember was that he was in severe time pressure in a Rapid game.....I had a LOT of time left.
Destroyer....challenge me in rapid live chess
I sent you a friend request.
Good job, yureesystem! Interesting position . . . but as for me, I believe in both ?! and !? and in beautiful refutations . . . NOT beautiful blunders. The perpetual check you refer to is easily avoided. White is a pawn ahead and has superior pawn alignment as well (Black's f-pawns are doubled -- not a serious weakness, but troublesome) so should win fairly easily. The IDEA of attacking twice to get past the en passant is pretty clever. My main problem is that we don't see the White position before the Qc6 move! LeonSKennedy992, I, of course, loved your instant refutation of his BLUNDER!!!!!
Bob
PS where was the White Queen before moving to c6?
Destroyer beat me.....but it was a veryyyy interesting game. Congratulations to him.
It took me about 5 minutes...nice puzzle!
It has to be either 1.h4 or 1.f4, but the first does not work due to the deadly check from g2 (or h2). The latter wins easily since (1.f4 exf3 2.h4) 2...f2+ can simply be gobbled.
Easy, but nice- a good exercise on simple tactics.
Ah, of course - Nice catch.
Good job, yureesystem! Interesting position . . . but as for me, I believe in both ?! and !? and in beautiful refutations . . . NOT beautiful blunders. The perpetual check you refer to is easily avoided. White is a pawn ahead and has superior pawn alignment as well (Black's f-pawns are doubled -- not a serious weakness, but troublesome) so should win fairly easily. The IDEA of attacking to get past en passant is pretty clever.
On the contrary, the perpetual check is kinda hard to avoid.....also the engine puts the position at almost equal UNLESS white plays the winning move f4, followed by h4 (IN THAT MOVE ORDER)