Yurchenko tuck 2/1
Yurchenko double full tucked
Erika Dungelova (BUL)
The Yurchenko tucked 2/1 does appear as a named skill in the code of points, named after Erika Dungelova of Bulgaria. Sadly, any visual evidence of her performing this vault has been lost to the sands of time.
In modern elite gymnastics, the Yurchenko tucked double full has met with the same fate as all the other complicated tucked vaults in that it is valued too low to ever be worth trying. It is worth only two tenths more than the layout full, so why would you ever even bother?