I think that your opponent does not want to lose, as that would be a much worse rating drop than the gain for his win. That appeasement that he or she has a higher chance to win is gone when the games are close.
This logic only really makes sense if the person rejecting a rematch is just going to retire from online chess after that initial game.
If I am planning to play another game, I'll play a new opponent and there is at least as much chance that they will be better than the person I just rejected a rematch from and thus that I will lose against them anyway. The 'logic' makes no sense.
Next topic. Why sore losers demand rematch 😎
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