Parker Brothers wrote all the rules. Many games were based on important events of the day: "Klondike" was based on the Alaskan gold rush, and "War in Cuba" was based on the impending Spanish–American War. The game industry was growing, and the company was becoming very profitable. In 1906, Parker Brothers published the game "Rook", their most successful card game to this day, and it became the best-selling game in the country. During the Great Depression, a time when many companies went out of business, Parker Brothers released a new board game called "Monopoly". Although the company had originally rejected the game
Hex (board game) marketed as a board game in Denmark under the name Con-tac-tix, and Parker Brothers marketed a version of it in 1952 called Hex; they are no longer in production. Hex can also be played with paper and pencil on hexagonally ruled graph paper. Hex-related research is current in the areas of topology, graph and matroid theory, combinatorics, game theory and computer heuristics. Hex is a connection game, and can be classified as a Maker-Breaker game, a particular type of positional game. The game can never end in a draw (tie), in other words, Hex is also a "determined game". Hex