When is a DCI Judge allowed to intervene during a match?

A DCI Judge is allowed to intervene during a match primarily when a rules violation occurs. This is crucial for maintaining the integrity of the game and ensuring that the rules are upheld for all players involved. When a rules violation happens, it is the judge's responsibility to assess the situation, determine the appropriate response, and enforce the rules as outlined in the IPG.

Intervention is not limited to specific times during a match, such as only during a player's turn, nor is it contingent on a player requesting assistance, which implies that a judge will only act when called upon by a player. Additionally, waiting until all matches have concluded is not a valid time for a judge to intervene, as it would be too late to rectify any violations that may have occurred during gameplay. Instead, judges must be proactive in ensuring fair play and can intervene as needed whenever a rules infraction is identified.