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| | Encyclopedia: Opera game (chess) |
 | | Chess is a two-player strategy board game of pure skill and one of the deepest and most complex games commonly played. |
 | | It was introduced into Spain by the Moors in the 10th century, where a famous games manuscript covering chess, backgammon, and dice named the Libro de los juegos, was written under the sponsorship of Alfonso X of Castile during the 13th century. |
 | | At one time, chess games were recorded using Descriptive chess notation, a somewhat clumsy notation that takes more space, more time to say, and more time to explain than its replacement, algebraic chess notation. |
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