There is no widely known legitimate channel or service by the exact name "Tb6." This could be a misspelling, a local cable branding from the 1990s/2000s, or a reference to a pirate stream label.
There is no guide because "Tb6 Russian Channel Playboy Latenight Movies" is a false memory or mislabel. TV-6 did not air that content. Focus your search on Ren-TV (1997-2002) or 2x2 (1994-1999) for authentic 90s Russian late-night erotic movies. Tb6 Russian Channel Playboy Latenight Movies --
https://www.traditionrolex.com/11