Dominoes may serve as the connecting link between such games as we have been considering and card games, since the lack of a prescribed field, the concealed store of each player, and the chance distribution at the beginning, as well as the acquisition of new ammunition during the game are common features. Playing cards are supposed to be a comparatively recent invention of the Chinese, which, like chess, was carried into Spain by the Saracens, and thence spread all over Europe in the fourteenth century. Many are of the opinion that they are a modification of chess, and in fact the oldest game known to be played with them is one of the most complicated that we have—namely, Taroc, which requires seventy-eight cards. It was played in Bologna in the beginning of the fifteenth century. Since the victory in card games is not won by virtue of the position of the cards, but by their succession and value, the faculty of memory is largely concerned, as victor and vanquished at once disappear and the men yet unengaged are concealed. This and the inequality of the players’ forces at the beginning constitute the distinguishing feature of cards. Lazarus’s penetrating glance has descried the point which differentiates the various games, placing them in the varying relation of accident and calculation. “Not all games,” he says, “are alike in this. There are some in which chance is predominant—as poker, for example, or the new game of bluff, so popular in America, where so much depends on the dealing, and the play is not so much a calculation as an attempt to exhaust one’s opponent.... The stronger games, however, such as whist, Boston, l’hombre, solitaire, piquet, Skat, euchre, etc., depend on the sustained influence of both chance and calculation. After the cards are once distributed calculation begins, but chance continues to be powerful,[399] for at every play a new card enters into the combination and must be given its due weight, whether from the hand of friend or enemy. This is more obvious in the cases where the original force is recruited by drawing from the pack; yet even here attentive following of the progress of the game will furnish data for determining the probable situation of a third card, and thus, after all, skill has as much to do with it as chance. And in such a game as whist _en deux_ in which all the cards are dealt, and each player knows exactly the strength of his opponent, the whole thing depends on calculation, and consequently is not so attractive. It would be a game of chess with cards but for its inferiority in variety and combination.”[400] Lazarus goes on to say why chance is indispensable in card games—namely, because, as there is no such thing as space combination, the monotony would be wearisome, and continued playing well-nigh impossible. Without Fortune’s reverses, too, the games would necessarily be begun with equal forces, and it is easy to see how little enthusiasm such games would excite.