Six players, round two, so you hold seven cards. P2 said "Dapp!", and you are P3.
Your hand
Do you call "Challenge!"?
Answer
Call “Challenge!”. One step down from the XIX, the XVIII is a trump stop with four other Taroks, and you hold four: the XIV, the XI, the IX and the VI. That is a hand you would claim yourself, so you Challenge, whichever way the bidder answers.
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.