Why Resign When Ahead?

Maybe something came up and they had to leave.

Regardless of whether I am winning or not, if I have to unavoidably abandon a game, I generally resign out of courtesy.

If you intend to be a better chess player online, you will need to learn how to premove and accept it as part of the game online.
Maybe something came up and they had to leave.
That's the most logical explanation
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