Der Link für "Denkfallen 1: Kartenspieler"
mit Wegpunkt "GC2RH5F"
http://www.geochecker.com/index.php?code=6f561d649a5d405751f7c87839221e0f&action=check&wp=47433252483546&name=44656e6b66616c6c656e20313a204b617274656e737069656c6572&language=German

Der Link für "Denkfallen 2: Sudoku"
mit Wegpunkt "GC2RHG8"
http://www.geochecker.com/index.php?code=b24cece8b3a6d7f457d1d79a52c18e84&action=check&wp=47433252484738&name=44656e6b66616c6c656e20323a205375646f6b75&language=German

The URL for "Denkfallen 3: Speedcaching"
with waypoint "GC2RHMB"
http://www.geochecker.com/index.php?code=3f896e9e112f10f95b5ec335e62062ae&action=check&wp=47433252484d42&name=44656e6b66616c6c656e20333a20537065656463616368696e67

The URL for "Denkfallen 4: Der Lügner"
with waypoint "GCRHQW"
http://www.geochecker.com/index.php?code=ce9e5090b9da303402066d98719bee1f&action=check&wp=474352485157&name=44656e6b66616c6c656e20343a20446572204cfc676e6572