zanzibar: Thanks, editorial staff!
Now, I was wondering how strong a player he was... it's a bit of a challenge since I'm not aware of a pre-FIDE Russsian/Soviet rating system. They awarded titles, which is indicative, but I was hoping for an ELO-estimate to compare him to Harijs Skuja.
Luckily, Roberts Skuja shows up at chessmetrics:
where his highest estimate is ELO 2411 on Aug 1958 rating list.
His best performance was 2360, in the Minsk (1957) zonal.
For the moment I don't have access to my full history of FIDE, but in 2004 (towards the end of his career), H Skuja was rated 2151.
So, I think the two were comparable, with the edge to R Skuja.