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But the fact that a player is using codes in the game can be easily detected!
If, at the moment, the tournament organizer doesn't have a "tool" to detect interference in the game or save file, then they should try to find a way to detect it, or, as I wrote, contact the developers.
(By the way, regarding sponsors - when organizing a King's Bounty tournament, we contacted 1C, as the official game distributor... the prizes were not only for the top 3 winners, but also for 4 other players who tried to improve their results after the tournament ended...)