There are hundreds of versions of Poker, and the game is played not only in private homes, but also in countless Poker rooms at famous casinos. A variation - Stud Poker - appeared at about the same time. During the Civil War, the key rule about drawing cards to improve one's hand was added. In the 1830s, the game was refined further and became known as Poker. As early as the sixteenth century, Germans played a bluffing game called 'Pochen.' It later developed into a French version, called 'Poque,' which was eventually brought over to New Orleans and played on the riverboats that plied the Mississippi.