Known and played variations and positions in any phase of the game. Opening theory is also known as the "book."
THEORY
Meaning of THEORY in English
English glossary of chess terms. Английский глоссарий шахматных терминов. 2012
Known and played variations and positions in any phase of the game. Opening theory is also known as the "book."
English glossary of chess terms. Английский глоссарий шахматных терминов. 2012