I actually did invade, and managed to eventually take out the O14 group and win

Okay, thanks. I actually did invade, and managed to eventually take out the O14 group and win, but got accused afterward of only playing N9 in the hope that black would make a mistake.

Guess they were right.

They were still whiny sore losers, though.

wow. I don't see how you could have done that.

But you also have to ask yourself: why didn't you invade *before* playing basically every last endgame move?

Should white just resign, or try an invasion? ...

I think that you are asking the wrong question. The right question might be: "Should I have tried invading 20 moves ago?" To which I, Lightvector, and everybody else in this thread would reply: "Yes!"

You are about 45 points down, and the game is almost over. And only now do you realize that it is time for desperate measures. How often do you count?

I recommend counting more often. Sometime, at least 20 moves ago, you could have counted, determined that you were behind, and made a much better invasion with a much better chance of succeeding.

-count in 2 : its quicker and its easier to count prisoners.

- when you are done counting your score, substract from 50 and start from here for you opponnent: if your opponent score is then bigger than 50 you are behind by that much. (ie if you have 35 start counting at 15 for your opponent)
i almost never count but when i do i use those 2 tricks.

I actually did invade, and managed to eventually take out the O14 group and win, but got accused afterward of only playing N9 in the hope that black would make a mistake. Guess they were right.

I really hate that advice because people don't think about what it actually say. Instead if reducing your score from 50 and counting to get a meaningless number why don't you just reduc the opponent's score from yours? You don't need to remember both of them, count one of them, and then start from there counting down for your opponent, the number you get is the ACTUAL difference and not a meaningless number.

If you can count backwards as easily and as quickly as you can count forwards, then why not? If, like normal people, you can count forward rapidly and are a little more prone to mistakes counting backwards, it's much easier to round up to fifty once and then start counting forward again.

Additionally, do people really count their own score and then their opponent's? I think it's much easier to do black and then white, because that way you never screw up komi.

To my mind, the only way anyone wins this game is if their opponent makes a mistake. If no one makes a single mistake during the game, then white would always win by 0.5 komi.

That said, I am really curious how you won this game. Any chance of posting the SGF?