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Chess Ratings 3

GMAT-TXUBV1

Harkness System

"Chess Rating System." (2015): n. pag. 14 Dec. 2015. Web. 23 Dec. 2015.

Elo Rating System

"Elo Rating System." (2015): n. pag. 14 Dec. 2015. Web. 23 Dec. 2015.

English Chess Federation System

"English Chess Federation." (2015): n. pag. 3 Dec. 2015. Web. 23 Dec. 2015.

English Chess Federation grades range from about 40 for very weak club players to about 150 for very strong club players. Scores higher than this generally belong to professional players. Men and women are graded in the same way by the English Chess Federation.

Suppose that Tournament X is reserved for women with ECF grades between 50 and 150 inclusive. How many categories would be needed to score this tournament under the Elo system?

A

8

B

16

C

24

D

32

E

36