Concisely
131William Oughtred — (1575 1660). Born 5 March 157 …
132Encyclopaedia of Chess Openings — ECO volume E. The second line of moves means it contains openings with 1. d4 Nf6 2. c4 g6, without an early d7–d5. The Encyclopaedia of Chess Openings (ECO) is a classification system for the opening moves in a game of chess. It is presented as a …
