Last month Felix Neumärker repeated Markus Bock's Corona, 9a+, at Schneiderloch, Frankenjura.
The 18 meter route was put up in 2006 and has previously seen repeats from Adam Ondra (2009) and Alex Megos (2013). According to Markus Bock's Top 100 list, it's the most difficult route in...
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