Jost Kobusch

[1] Kobusch grew up in Borgholzhausen and, after an early divorce of his parents, was raised by his father, a carpenter.

[7] In 2017, Kobusch was the first to reach the top of Nangpai Gosum II (7,296 m); he was solo and did not use supplemental oxygen.

[8] In the winter of 2019/2020 Kobusch attempted his first solo Mount Everest ascent without supplemental oxygen but had to give up at 7,360 m.[1] His second attempt to ascent Mount Everest solo and without supplemental oxygen started in the winter of 2021/2022.

According to Krzysztof Wielicki who did the first winter ascent of Mount Everest using the standard route, his chances of success would be 50-50.

[1] Being exposed to almost continuous bad weather that wrecked five tents Kobush was not able to get to the top but intends to return in 2 years for another attempt.