queen to f3
Did I miss a Checkmate?

It would be interesting to see some moves before this position. As far as I can tell, your best choice here was perpetual check. If you had tried anything but check rightaway, the king would've run away via h5.... and the only possible check is Qf3+ and pawn f3 (which only pushes him to safety). The second move has the same problem. the king looks trapped, but you need several tempi to get a rook to checkmate and by then your queen will surely be threatened and the game is lost.

It would be interesting to see some moves before this position. As far as I can tell, your best choice here was perpetual check. If you had tried anything but check rightaway, the king would've run away via h5.... and the only possible check is Qf3+. The second move has the same problem. the king looks trapped, but you need several tempi to get a rook to checkmate and by then your queen will surely be threatened and the game is lost.
That was the problem I had. Nothing was quick enough, and his defensive resources, though far away, were decisive in preventing victory.

in this position:
f3+ Kxg3
Qh2#
am i right?
forget what i said , black can go Kh5 .... but i am almost sure that there is a mate.

in this position:
f3+ Kxg3
Qh2#
am i right?
I'm afraid not dpakoh. After f3+ the King can escape via h5.

why dont u check it with a chess engine, i am at work now so i cant do it.
I don't have one at the moment, I'm still deciding which to go for (after asking for advice in the forums, I'm going for chessmaster).

i am thinking of :
Qf3+ Kh3
Kf1 (with the idea white K to go to e2 and checkmate with Rh1)
but i am still pondering on black's reply

i am thinking of :
Qf3+ Kh3
Kf1 (with the idea white K to go to e2 and checkmate with Rh1)
but i am still pondering on black's reply
I looked at that, but I don't think there's time. Black could reply with Rf6.
It seems like it.
I'm thinking of
Qf3+ Kh3
Rd3! and now Black has virtually no moves. White can simply play Kh1, Rg1, Rg2 and Rh2#.
OR if he tries to exchange queens,
... Qf6
Qe2 (threating f3 and mate) Qg6 (preventing f3)
f4! and White wins. (the threat is g4+)
Edit: I looked at Rf6 and you will still get your mate. Black can only prolong it.)
30. Qf3+ Kh3
31. Qh1+ Kg4
32. Qf3+ Kh3
33. ½ - ½ What about 33- g4+...? With a discovered check on Black
This is an online game a played recently. It was a bit mad. I managed to sac all of my minor pieces (not quite deliberately!) and bring the black King to a position where I was sure I could checkmate him. However, after much studying, and going over the position on the analysis board again and again, I just could not see a checkmate. I knew I could save the game with a draw by perpetual, ie:
30. Qf3+ Kh3
31. Qh1+ Kg4
32. Qf3+ Kh3
33. ½ - ½
And so it ended. But I’ve had the nagging feeling ever since that I missed a win. Is there a checkmate here?
Apologies, the diagram should say 'White to move'.
ED.