I've already seen a couple errors by me (white), at a first glance. Im curious as to whether or not anyone else can find a quicker line to mate, considering this game had some great tactical positions to work with! 

23. d7+ looks strong to me:

23. ... Kb7

24. d8=N+ !

or

23. ... Kb8

24. d8=Q+ 

Well, if you want a theoretical quicker mate, you have to look at how fast the mate would have resulted in this case. Let's see...

27. ... Bb8
28. Rxb8+ Ka7
29. Be3#

 or

27. ... Kxa8
28. c8=Q+ Bb8
29. Nc7+ Ka7
30. Qa6#

... so far, I can't find anything faster. I've been toying with 25. Rd8+ Kb7 26. Rxa8 but black can interpose a piece at b8 and cause problems with pawn promotion. So you probably made the optimal choices when you could.

There's nothing in the 23. d7+ Kb7 24. d8=N+ line that shows any promise with respect to making a cohesive mating net. Black can just take the new piece and eventually escape wtih his king to a5 or keep blocking w/ pieces. For example, 24. ... Rxd8 25. Nxd8+ Kb8 doesn't give white much of an attack. Remember that the bishop on e4 prevents Rb1+.

20. Nxf8 would've been a smarter move at the time no doubt, but then you probably wouldn't have gotten your pawn advanced so far.

I know this is not relevant to a quicker mate, but:

10. O-O

Seems better than losing your queen with: 

10. Qe2

In this manner the queen would most likely do:

10. ... Qxa4

This way you'd not swap queens but only lose a bishop.

Maybe I'm wrong, thought I'd put that out there...  And again, sorry this doesn't explain a quicker mate. 

unHOLYdoNUTS:

In my line, after 25. ... Kb8, White has 26. Nxf7, having won 2 rooks at the cost of a pawn.  While it isn't a mating attack, the resulting 2 rook disadvantage is significant, and most players would resign at that point.

9.Qc2

photray94 wrote:

I know this is not relevant to a quicker mate, but:

10. O-O

Seems better than losing your queen with: 

10. Qe2

In this manner the queen would most likely do:

10. ... Qxa4

This way you'd not swap queens but only lose a bishop.

Maybe I'm wrong, thought I'd put that out there...  And again, sorry this doesn't explain a quicker mate. 

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hello???? its a pin!!!!! black can't vdo Qxa4!!!!!!

photray94 wrote:

I know this is not relevant to a quicker mate, but:

10. O-O

Seems better than losing your queen with: 

10. Qe2

In this manner the queen would most likely do:

10. ... Qxa4

This way you'd not swap queens but only lose a bishop.

Maybe I'm wrong, thought I'd put that out there...  And again, sorry this doesn't explain a quicker mate. 

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 10. 0-0 is not possible; you cannot castle while in check.