For questions about match-fixing, where sport participants attempt to cause predetermined results that may not arise naturally in order to gain non-sporting benefits.
Match-fixing is an unsportsmanlike and sometimes illegal activity in which the participants of a sport attempt to cause specific outcomes that are predetermined, when these outcomes may be either unnatural or against the usual interests of the participants.
It often occurs as the result of bribery (and then often by gambling-associated parties) to players or officials in order to profit from betting on a match, but other match-fixing incidents have involved threats to the relatives of participants, governing bodies wishing to create results that are more popular and marketable, or teams working a competition structure to provide their associates or themselves with improved odds of proceeding through the competition.
Match-fixing may involve
deliberately making a specific error at a given time, such as a no ball in cricket
deliberately allowing the opponent to score, or deliberately not scoring in favour of one's own team
making less effort than is expected and possible to hamper one's team or individual performance, "holding back" while playing
making official decisions that are suboptimal for a given standard or even incorrect under the rules to (dis)advantage one side compared with another.
using technical, non-playing issues to reduce or bolster a team's effectiveness