"sixth grade" in six-tier scale of alpinistic difficulties proposed by Willo Welzenbach (corresponding to 5.9). Thirty years later UIAA used this as a basis...

Northwest Face (Nordwestwand) on 15 July 1924 by Franz Riegele and Willo Welzenbach. They were the first ones to use ice nails (Eisnägel) to assist them;...

that followed, three famous German mountaineers, Ulrich Wieland [de], Willo Welzenbach [de] and Merkl himself, as well as six Sherpas, died of exhaustion...

grades of level 0 and level 00 were added. In 1923, German mountaineer Willo Welzenbach [de] compressed the scale and reversed the order so level 00 became...

that followed, three famous German mountaineers, Ulrich Wieland [de], Willo Welzenbach [de] and Merkl himself, as well as six Sherpas, died of exhaustion...

Switzerland climbing region; famous overhang known as "the mailbox". 1923 : Willo Welzenbach [de], adding to Dülfer's five grades, creates the Roman Numeral European...

climb its east face. In 1923, Noll-Hasenclever, Hans Pfann [de], and Willo Welzenbach [de] made the first two-day climb of the Matterhorn and the Dent d'Hérens...

were tackled two years later by the direct line of the 'Welzenbach Route' (Willo Welzenbach and Eugen Allwein) on 10 August 1925, which may be considered...

the southeast (I) and northeast (II) ridges. The route first used by Willo Welzenbach and E. Müller up the northwest face is rated as grade V. Stephan Beulke:...

Gilgit because he had entered Kashmir illegally. See Collie (1902). Willo Welzenbach [de], who died on the 1934 expedition, had written to his parents,...