To take an offered piece, as in the King's Gambit Accepted opening 1. e4 e5 2. f4 exf4. See also "Decline".

An aggressive move, line of play, or position. When mentioned in regards to a playing style, it indicates sharp or tactical tendencies.

The use of attack as a defense, rather than passively trying to cover weaknesses.

A developed piece that is actively participating in the conduct of the game. Active pieces form the basis of any attack.

Where the current position of the game favours one side over another. A material advantage refers to having a higher point count than the opponent. A permanent advantage is one with a lasting effect, [..]

The ability to take advantage of the opponent’s inaccuracies while playing accurately yourself.

The modern and most popular way of recording chess moves, using single letter piece identifiers and unique alphabetic file and numeric rank identifiers.

A technique used by computer programmers to cut down on the number of possible moves a computer has to evaluate before choosing the best move.

Calculation of possible moves and variations for a position.

Written comments about a game or position. May include variations from the main line of play.