Please, I need to notify a wrong match assignment. We were in a draw endgame: King and Knight against King and Knight. I offered draw lots of times but my opponent always refused my offer because I was short on time. Then... he won by time. But the match is clearly draw!! How can i submit it to the Admin to obtain the right assignment (and the related point variations)? Now this is a question of principles to me...

It was correctly declared a win because a checkmate was possible via a series of legal moves:

Yeah... I know it... but we weren't in such a position... if something similar would have happened to me in a tournament, I would have obtained the draw because of the quick play finish rule...

At a tournament if you appealed to the arbiter in a K + N vs K + N where you were 1 move away from checkmate, the game would not be declared drawn.  So the problem is that online there's no way to automate that decision.  A program can't tell how dangerous the position is relative to the human's strength.  So instead whenever there is mating material it will always be a win (or loss) on time in order to be fair to the greatest amount of players although in some cases like this it's not perfect.

Luckily online ratings are just for fun -- so it's best to move on to the next game and just forget about it.  In blitz/bullet with no increment such is the risk, and in the long run you may find you win on time in the same way roughly as much as you lose because of it.

IMO the solution would be too tedious for such a small problem -- in my experience the wins and losses from this kind of thing balance out and online ratings aren't serious anyway.

In these situations, remember you cannot lose to his lone piece - his only chance is your piece stays on the board to block an escape square for your King.

Soooo - sac the piece.  With N v N, attack his N repeatedly, chase it around and sooner or later you will force him to take it by forking his N and K, or by cornering his N if he refuses to capture yours.  Once your N is off the board, it is a draw in every case.

Of course, OTB you could summon the arbiter and claim a draw - unless you were about to be mated, as orangehonda mentioned @ #4.

it is weird that the last moves of a game would create debate-one might find that one's opponent had blundered in his opening...do we debate that?

there are many way's of winning a game, they are all legal:)