Chess is a two‎-player strategy board game played on a chessboard‎,‎ a checkered gameboard with 64 squares arranged in an eight‎-by‎-eight grid‎.‎ Chess is played by millions of people worldwide‎,‎ both amateurs and professionals‎.‎Casual games usually last 10 to 60 minutes‎;‎ tournament games last anywhere from about ten minutes ‎(‎blitz chess‎)‎ to six hours or more‎.‎Each player begins the game with 16 pieces‎:‎ one king‎,‎ one queen‎,‎ two rooks‎,‎ two knights‎,‎ two bishops‎,‎ and eight pawns‎.‎ Each of the six piece types moves differently‎.‎ The most powerful piece is the queen and the least powerful piece is the pawn‎.‎ The objective is to ‎'‎checkmate‎'‎ the opponent‎'‎s king by placing it under an inescapable threat of capture‎.‎ To this end‎,‎ a player‎'‎s pieces are used to attack and capture the opponent‎'‎s pieces‎,‎ while supporting their own‎.‎ In addition to checkmate‎,‎ the game can be won by voluntary resignation by the opponent‎,‎ which typically occurs when too much material is lost‎,‎ or if checkmate appears unavoidable‎.‎ A game may also result in a draw in several ways‎.‎