More strategic games provide more information sooner. Some popular games and their characteristics along these lines are given in the table below. Bidding conveys information. The extreme example of this is Bridge where the goal of the bidding is to convey to one's partner as precisely as possible the exact configuration of one's hand. In Skat, the bidding is by number so that the exact cards held are not always clear, but one gains information on the cards held and the intended game by where the bidding stops.
More strategic games have fewer players.
In games of pure strategy such as chess, the opening positions are completely known. Card games are more or less strategic depending on the total number of cards and the percentage of them that are known at the start of play. The shorter the pack, the more quickly the lie of the cards can be determined in addition to those known in advance. Strategy is most effectively implemented from an offensive position. The purpose of trump is to change the offensive and defensive positions.