If it’s not technically cheating, it could be described as gamesmanship.

From Wikipedia https://en.m.wikipedia.org/wiki/Gamesmanship

“Gamesmanship is the use of dubious (although not technically illegal) methods to win or gain a serious advantage in a game or sport. It has been described as "Pushing the rules to the limit without getting caught, using whatever dubious methods possible to achieve the desired end".”