board games where strategy of one player against another or other players is the dominant theme. many of the Eurogames such as Settlers of Catan qualify.
in most cases the game time is at least two hours and folks who like "party" or social games such as Trivial Pursuit will feel this is a totally different type of game than they are used to playing.
1) this category is not for "simple readily available" board games such as Risk, Monopoly, and even Chutes and Ladders.
2) this category is not for purely war games such as Axis and Allies.
3) this category is not for pure abstract strategy games such as Chess, Checkers, and Blokus.