Apart from the fact that I saw&heard too many lightnings too close to myself and on either side while golfing at the Czech border lately (followed by a Blitz hit the hotel where we searched shelter),
look it up in the FAQs =>
P.S. I recommend to play Kynzvart (nice hotel, too) and Marianske Lazne (Marienbad) - a blast!
Add Bohemian food and Budweiser + Pilsner beers: Heaven!!