環狀象棋

環狀象棋（Circular chess、Byzantine Chess ），是使用環狀棋盤的國際象棋變體，歷史可追溯到九世紀的拜占庭象棋。

遊戲規則
*四環道的黑白相間棋盤，每一環道皆十六個方格，組成六十四個棋格。
*將棋子依初始排列。
*玩家右手邊的棋子以逆時鐘方向為前方；左手測的兵卒以順時鐘方向為前方。當兵卒移動到距離初始行180度的橫行時升級。
*無王車易位。
*其他依照正統的國際象棋規則。

註釋
外部連結

• [http://www.todomexicoesajedrez.com/2015/junio/22/LIBRO%20AJEDREZ%20CIRCULAR.pdf Circular Chess Handbook by Abu Faisal Tapia]

[http://www.chessvariants.com/shape.dir/circular.html "Circular Chess"] by Hans Bodlaender, The Chess Variant Pages*
*
*[http://www.circularchess.com Circular Chess Software (Windows 95 – Windows 7)]
*[http://www.ochess.com/software.html Circular Chess Software (Windows 3.x)]
*[http://www.codeproject.com/KB/aspnet/circular_chess.aspx An Open Source Online Circular Chess]
*[http://www.pathguy.com/chess/Circular.htm Circular Chess] a simple program by Ed Friedlander (Java)
*[https://www.musketeerchess.net/tools/boardpainter/circular.php Circular Chess Board Painter] a freeware program editing Circular Chess Boards with Classic Chess pieces but also with fairy Chess pieces.