Bobby Fischer crushes Chilean Chess Champion in 23 moves | 1960

Featured is a Round 8 game from the Leipzig Olympiad of 1960. It was played between Chilean chess champion Rene Letelier Martner and Bobby Fischer on October 24th. International Master Letelier won the Chilean Chess Championship 5 times (1957, 1959, 1960, 1964 & 1972). With 4...0-0, rather than the most popular d6, Fischer invited Letelier's e-pawn into his house. That invitation was accepted and soon Fischer would be confronted with an optically menacing white pawn center of 4. How one ought to handle such a central structure is especially valuable for chess minds who look to improve. Fischer demonstrates how to dismantle white's center, and adds double exclamation marks with his flashy final move.

Rene Letelier Martner vs Bobby Fischer | 1960 Leipzig Olympiad, Round 8

Below the video I have highlighted 2 positions
https://youtu.be/_9Ly6jx2uz8

Question 1 of 2: What do you think the primary function of f5 is?

Hint: It's a positional idea

Question 2 of 2: What is Fischer's final flashy move?

Hint: None

Closing words

I thank you in advance for any likes and/or follows you may give. If you have any questions or comments, I would prefer they be directed to the video's comments section on YouTube. If you enjoy the featured video, you may also enjoy the playlist I've created "Bobby Fischer's Chess Games".
I hope you have, in some way, benefited from this post. Thank you for taking the time to read.
Be well... -Jerry