Comment by its_nikita

> Unsurprisingly, other oil companies had no hope of offering lower or even equivalent rates and still making a profit. If any of them seemed like they might pose a threat, Rockefeller could use his influence over the shipping companies to restrict their ability to transport oil.

The chess analogy is interesting, but I'm not sure it applies to Rockefeller. If anything, his strategy is closer to cheating than actually being good at the game.