vonKrolock: Certainly one of the strangest Games in record!
<17...g7-g5>? An attempt to attack in this way would hardly be justified in such a position.
<22...
g7>? Much better was 22...
e6
<24.
h4>! A nice way of winning a whole
...
<28...
d8>!? What? He did not resign - will play a piece down?!
<38.
h1> This was, for me, the first white move that can be criticized - with the black
becoming very active, to corner his white equal in this way is an unnecessary self inflicted handicap -
f3, with idea of
f1 and
e2 was in order, even at cost of the 'd' 
<43.
xa7> Now the
is out of play - something very odd is about to occur...
<46...
f2>! A fine move that secure at least a draw...
<47.
f3+>? A panic reaction - I can not say yet when white lost half a point (probably between moves 43 and 46) but now he throw away even the other half - a draw was at reach with 43.
b3! (the only defense)
xa2 44.h4! etc
<48...
g3>! And check mate in the next move