He did probably the hardest boulder in travers
in Frankenjura (Germany). The travers boulder was done by Andre Behr in 2000 and it has got yet only 5 climbs (incl. the Rosťa´s one, the last before Rosťa, German climber Christian Bindhammer climbed the travers).
The name of the problem is je Crashpad Dummy 8B+
Sponzors: HUDY Sport, PAD.cz
The climbing topos of some areas in Frankenjura arte here at www.czechclimbing.com among the GUIDES pages