ZABEL / წაბლი [tsabli]

1. Zabel (Germ.) is chessboard.
2. Chessboards are often made from chestnut wood.
3. Chest and chess are more than similar (never noticed before).
4. Chess has no reliable etymology.
4. წაბლი [tsabli] is chestnut in Georgian.

So, Zabel used to mean chestnut and comes from Kartvelian tsabli, although the Germans themselves don't know that...