Headlines and Titles of Works

Q. According to CMOS, the names of major sporting events are capitalized. But none of the examples provided include major sporting events made up of multiple games. For the World Series, for example, would it be Game Four of the 1948 World Series, or game four of the 1948 World Series?

A. Either way is fine, but Chicago style prefers to lowercase when there’s a choice, and we also like to use numerals for enumerations, so we would probably refer to game 4 of the World Series, in the way that we refer to chapter 1 of a book.