Seven players, round two. P2 said "Dapp!", P3 passed, and you are P4.
Your hand
Do you call "Challenge!"?
Answer
Pass. Three Kings and the VIII are no trump stop, so this is not a hand you would claim yourself. If the bidder said “Go ahead”, your three Kings would have to stay in your six cards, and with six opponents somebody is almost always out of the suit, and the King gets trumped.
Rule: Call Challenge with a hand you would claim yourself, a trump stop on the ladder, and pass without one. The bidder chooses whether you play it, and either way the hand pays double.