Here is a video logic games explanation for Preptest 7 (February 1993), Section 2, Game 4. If you are doing this whole section, here are the Game 1, Game 2, and Game 3 explanations.

This preptest is the first in the compilation 10 Actual Official LSAT Preptests.

This fourth game is a moderately difficult advanced linear game. Once you make a key inference, there isn’t much left to do. Practice building your intuition by trying it out. Hint: The block formed by combining rule 2 with rule 3 might not be able to fit in many places). Do it on your own then compare your work.

PT 7, Section 3, Game 4