You are P2 and opened with Two. P3 bid One, and P4 and the Forehand passed, so the bidding comes back to you.
P3
One
P1Forehand
pass
P4Dealer
pass
Your hand
Do you pass, say "I hold" and take the One, or bid Solo three?
Answer
I hold. P3 sits after you in the seat order, so you may hold their One without raising. Six Taroks with three big ones (the Skus, the XXI and the XVII) meet the test for One. A Solo asks for a count past six, and you hold six, so do not climb to Solo three.
Rule: Climb to Two, One or a Solo only as your Tarok count climbs past five and then six, one extra big Tarok per rung as the price of one fewer talon card.