Mutual Blackmail (plot card) Confusion

By Khalpongo, in 2. AGoT Rules Discussion

Please clarify, how does MUTUAL BLACKMAIL applies? its states: When Revealed, if you have more than one opponent, choose an opponet, then you and that opponent cannot declare an (INTRIGUE) challenge for this round..(something like that) Is it for Melee battles only? or the word "IF" is optional, hence you can still not declare an intrigue to your JOUSTING opponent (a 2player game)? same as the MUTUAL ENEMIES plot card..

If you have more than one opponent, the rest applies. If you don't, the rest does not.

In other words, the When Revealed text has no effect in a joust game.

In a melee game, you are *forced* to choose an opponent, and you and that opponent cannot declare intrigue challenges against each other. You're still free to declare intrigue challenges against the other two players, allowing for restrictions from supporting titles.