Originally, Nalimov never released a full 7-man set due to astronomical file sizes (estimated 15+ terabytes uncompressed). Some niche torrents claim partial 7-man coverage, but they are for standard use.
Nalimov bases are still preferred for where the goal is to find the fastest mate possible, regardless of the 50-move rule. -More Tablebases- and Downloads Nalimov Tablebases -3 4 5 6- -more tablebases- download
A 3-man tablebase alone is trivial. To analyze real games, you need at least 5-man. To be a serious tournament player or engine tester, 6-man is mandatory . The 6-man set covers the vast majority of endgames that occur in human and computer play. Originally, Nalimov never released a full 7-man set