However , the three southwest - buttress climbers , Demjan , Moiseev and Valiev , had shortly before climbed in the Tien Shan and were acclimatized .
It was obvious that the Japanese route was out of the question for that group , which lacked acclimatization .
The three southwest - buttress climbers , Demjan , Moiseev and Valiev , had shortly before climbed in the Tien Shan and were acclimatized .
It was obvious that the Japanese route was out of the question for that group , which lacked acclimatization .