ChessOps - CATEGORIES of OPENING
Chess games are usually categorised
into groups according to White's first
move or two:|
Games are also categorised descriptively by Black's early reply, eg:
Finally, a specific opening is usually named
according to how it develops along recognised lines as
an Opening, a Defence, an Attack, a Variation,
a Gambit or a Counter-Gambit.
An open vs. closed defence (and
also semi-open or semi-closed), depending on Black's reply to White's
KP or QP start).
A king's-side vs. queen's-side defence (favouring one side
of the board), largely depending on Black's first choice of knight for
Regular vs. Irregular defence, i.e. whether Black's chosen
reply is frequently played by masters, or rarely (if ever) played.