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Double Chess is a chess variant invented by Julian S. Grant Hayward in 1916. The game is played on a 12×16 chessboard with each player in control of two complete armies placed side-by-side. The rules were published in the January 1929 issue of ''British Chess Magazine''. ==Game rules== The illustration shows the starting setup. A player wins by checkmating either enemy king. Additional rules: * Pawns have an initial ''up-to-four'' step option. ''En passant'' captures are permitted. * A king may castle only on its own half of the board. As in standard chess, pawns promote upon reaching the furthest rank. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Double Chess」の詳細全文を読む スポンサード リンク
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