Treasures Under the Mountain: The Animated Soviet Hobbit (1991)
A while ago, I took a look at the 1985 Soviet adaptation of The Hobbit, in all its unique glory: https://phuulishfellow.wordpress.com/2017/10/25/the-soviet-hobbit-1985/
But it turns out that this was not the only Soviet cinematic/televised stab at Tolkien’s work. In 1991, they began work on an animated version of The Hobbit, which was subsequently aborted due to the dissolution of the Soviet Union later that year. By good fortune, the Prologue/Pilot Episode, amounting to about six minutes, actually survives:
So we get The Lonely Mountain, Dale, Smaug, Gandalf, and the Dwarves. We never get to see Bilbo, let alone any of the subsequent adventures, which means that properly reviewing it as an adaptation is rather difficult. From the bare six minutes, the animation is pretty decent, and arguably might have wound up more Purist than the live-action 1985 effort (there is great emphasis on the Bells of Dale). This Gandalf, however, looks much more assertive than other versions. You really don’t want to mess with him – not because he’s Odinic, a la Rankin-Bass, but because you think he’s fully capable of punching you in the face. It’s also interesting that the festive inhabitants of Dale engage in a bit of old-school Soviet fraternal kissing.
According to Wikipedia, there was also an attempted Soviet adaptation of The Fellowship of the Ring in 1991 – Khraniteli – but that appears to be totally lost.
Addendum: Khraniteli is not so lost after all: https://phuulishfellow.wordpress.com/2021/03/31/long-lost-and-psychedelic-khraniteli-the-soviet-fellowship-of-the-ring-1991/