it uses a metaphor. but personally i say its a simile but thats why im not a teacher XD
Explanation:
Over time, the average chess game has consistently ended with about 16 pieces captured between the two sides. Despite the fact that chess games are getting longer, more pieces aren't being captured in that extended time period. Whereas a piece was captured every 4 ply in 1850, a piece is captured every 5 ply in 2014.Jun 12, 2014.