Speed and aggression.

Most likely, the opponent is trying to accuse me of violating the rules because, in the middle of the game, I first killed a Dwarf unit and then, following that, eliminated the insignificant guard unit near it, which was moved aside due to the resources lying nearby. It's very unsportsmanlike and pathetic for the opponent to try to win based on this trivial matter; there were no other violations, and one of the tournament judges even watched the beginning of the game via microphone.