Match-fixing is when you intentionally play in a way to change the natural outcome of a match. This includes:
Losing on purpose for money or strategy.
Changing the score, like "winning by X points" or adjusting series results.
Teaming up with others to change scores, rounds, or who wins/loses.
Examples of Match-Fixing:
Losing to another player on purpose.
Changing the match outcome to cause a guaranteed score.
Convincing others to lose or change their play to affect the outcome.