I always thought the show made a fascinating choice by framing Benny Watts as the primary rival, especially in the early episodes. He's cocky, he's got that distinct style, and he represents a certain brash, American approach that clashes with Beth's more isolated, intuitive genius. But the more I think about it, the rival that truly defines her journey is Borgov. He's the immovable object, the Soviet wall she has to scale. Benny is more like a prickly ally—he helps her, they have a thing, he's part of her crew in Moscow. Borgov is the Everest.
What I found really compelling was how Borgov wasn't a villain. He was just... better. Stoic, respectful, and unbeatable for most of the series. That final match wasn't about hatred; it was about pure, distilled competition. Beating him meant conquering the entire system that created him, which was way more satisfying than just outsmarting a personal nemesis.