KubiTarock for Windows and Android
Caller (Koenig-Rufer)
Game Rules > Basic Rules and Game Categories > Caller (Koenig-Rufer)

This positive game can be played by the forehand player only. In contrast to the Better Caller, no Better Piece must be announced. Apart from that, the rules for caller games apply.

As forehand player, you are not forced not take any risk. If your hand cards are sufficient for a Caller solo or for a Better Caller, you should choose the Caller instead. After Talon acquisition, you know if you are playing with a partner and if you have a Better Piece. Therefore, you can still announce the Better Piece if there is a good chance to make it.