I have been toying with the idea that 7 of the 9 descended the slope as a group in darkness walking side by side. They were calling out for the two Yuris who previously went on an errand and did not return as expected. Those 7, having shed their heavy garments in advance of bed time, were inadequately dressed for an extended trek, but perhaps they figured the Yuris would be somewhere between woods and tent. If so, then all of them would be back in the tent relatively quickly That did not happen.
A switched on flashlight on the third rock outcrop suggests they, the rescuers from the tent, made this descent at night. Too, since they did not find the two Yuris enroute, they descended all the way to the tree line, perhaps drawn to the cedar by flames, the glow of a fire or intuition. This distance from the tent was further than any thought they would go. Still, if it was to be a matter of helping friends limp back to camp, all would be well enough.
What they found surely must have shocked and saddened them. The Yuris had gotten wet and chilled. Either the Yuris (whom I suspect) or the rescuers made a fire but it was insufficient. It is additionally possible that in order to make an even larger fire, someone climbed the cedar resulting in a fall and additional injury. Perhaps the 7 from the tent found the Yuri's dead or nearly so. I suspect at least one had succumbed because of the livor mortis location on the corpse when found by later rescue/recovery efforts. He had been turned over when placed by the tree trunk. Tending a Yuri still alive came at the expense of body heat for all. When both had expired, the bodies were undressed for survival of the others and prominently placed respectfully for retrieval at a later date.
From the map posted earlier on this thread, Igor, Rustem and Zina were not oriented to the tent, but rather to the flashlight, perhaps to gather it by following steps already made in snow. Then, back to the tent. Being inadequately clothed plus facing subfreezing temperatures and a headwind, their strength failed them, each falling a bit further on than the last.
The others sought protection from the wind in a ravine...
Since none returned to the tent, it got torn up by the weather.