semplicemente che A sta facendo cheating, nella fattispecie credo sia questo:
Cita:
6.2. Cheating — Fraud
Penalty
Disqualification
Definition
A person intentionally and knowingly violates or misrepresents rules, procedures, personal information, or any other relevant tournament information. Note that Fraud, like most cheating, is determined by an investigation and will often appear on the surface as a Game Play Error or Tournament Error.
Additionally, it is Fraud if a player (or teammate) notices an offense in their match and does not immediately call attention to it.
A player must be aware that he or she has committed an error in representation in order for the infraction to be Fraud. For example, a player targeting a black creature with Terror has not committed Fraud if he or she forgot that Terror can not target black creatures, even though the action (playing Terror) was intentional and illegal. It is Fraud if a judge believes he or she was aware and hoping that his or her opponent would miss it.
One does not need to be a player in a game to commit Fraud. In particular, teammates observing a game are expected to point out problems and call a judge to help if required.
Ossia sta manipolando le informazioni di gioco x indurre in errore il suo avversario. Chiaramente quando giochi a magic non stai giocando al gioco delle tre carte... l'intenzione di B è chiara e voluta.
B potrebbe essere chiaro e dire "spigo quella che ruba squire", se non fai quanto chiesto, A sta mentendo -> cheating.
Il judge darà sicuramente ragione a B, in quanto A sta creando confusione sul board x trarre vantaggio e indurre B a fare un azione che non farebbe.
E il cheating causa la squalifica.
Invece un comportamento come quello suggerito da MaxT1, porta questa sanzione a suddetto giocatore:
Cita:
5.5. Unsporting Conduct — Aggressive Behavior
Penalty
Disqualification
Definition
A player acts in a threatening way towards others or their property.
Quindi chiamate sempre un judge che è
garante del buon gioco (e diffidate di tornei senza judge

)
ps. potrei avere un IPG datata (è del 01/10/10), ma dubito il concetto sia cambiato enormemente