play chess
artificially intelligent opponent attacking and defending being part of tournament being watched by kibitzers calculate variations capture of bishop capture of knight capture of pawn capture of queen capture of rook capture pawns capturing en passant castling castling king castling kingside castling queenside checking checkmate opponent compete against another player computer wins concentrate concentrate strongly concerntrate on chess game controlling diagonal controlling file controlling row controlling square defending piece discovered attack discovered check drawn game en passant end game end game reached focus attention following rules forced move getting beat by prodigy guarding pawn having passed pawn intellectual stimulation kibitzers gather kill opponent's queen loosing bishop loosing knight loosing pawn loosing queen loosing rook lose lose track of time middle game might win move chess pieces move pieces openning variation patience pieces get knocked over promoting pawn promotion protecting piece run out of time set up pieces textbook move think ahead thinking time expires time moves touch piece trap travel arrangements try to win unexpected move use timer visualizing patterns winning would win