Can a player be disqualified for knowingly giving incorrect rulings to gain an advantage, and can past tournament behavior be considered when investigating?

Ruling: A player who knowingly tells their opponent an incorrect ruling to gain an advantage is cheating and can be disqualified. However, a DQ should never be issued without conducting an investigation first.

Sequence:

• Conduct an investigation when cheating is suspected
• Ask relevant questions: How does this interaction work? Why did you think that? What happened previously?
• Determine if the player knowingly gave false information to gain an advantage
• If investigation concludes intentional cheating occurred, issue a DQ

Nuances:

• Judges may take into account a player's history or skill level when investigating
• Past behavior from previous tournaments can be considered as context during the investigation
• Simply giving incorrect rulings is not automatically DQ-worthy; intentionality and advantage-seeking must be established
• Players should always call a judge rather than rely on opponent rulings