Celtic board games played across much of Northern Europe from earlier than 400 CE until the 12th century. Although the rules of the games were never explicitly recorded, it seems to have been a game with uneven forces (2:1 ratio) and the goal of one side was to escape to the side of the board with a King while the other side's goal was to capture him. Tafl was spread by the Vikings throughout northern Europe, including Iceland, Britain, Ireland, and Lapland. Chess was introduced to the Iberian emirate of Cordoba in 822 during the reign of Abd ar-Rahman II. By the middle of the 10th century it was being played in Christian Spain, Italy and Southern Germany. By 1200, it had reached Britain and Scandinavia. Initially there were many differing local Chess games with varying rules or assizes such as Short assize chess, Courier chess and Dice Chess. An important source of medieval games is the Libro de los juegos, ("Book of games"), or Libro de acedrex, dados e tablas, ("Book of chess, dice and tables", in Old Spanish) which was commissioned by Alfonso X of Castile, Galicia and León in 1283. The manuscript contains descriptions and color illustrations of dice games, chess and tabula, a predecessor of backgammon. The book portrays these games within an astrological context, and some game variants are astronomically designed, such as a game titled "astronomical chess", played on a board of seven concentric circles, divided radially into twelve areas, each associated with a constellation of the Zodiac. The symbolism of the text indicates that some of these games were given metaphysical significance. Chess was also used to teach social and moral lessons by the Dominican friar Jacobus de Cessolis in his Liber de moribus hominum et officiis nobilium super ludo scacchorum ('Book of the customs of men and the duties of nobles or the Book of Chess'). Published circa 1300, the book was immensely popular. Other pre-modern European board games include Rithmomachy or "the philosophers game", Alquerque, Fox & Geese, nine men's morris, draughts, Nim, Catch the Hare and the Game of the Goose. Dice games were widely played throughout Europe and included Hazard, chuck-a-luck, Glückshaus, shut the box and knucklebones. Card games first arrived in Italy from Mamluk Egypt in the 14th century, with suits very similar to the Swords, Clubs, Cups and Coins and those still used in traditional Italian and