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+<p>The board is rotated by 45°, and then the game follow usual rules.</p>
+
+<p>Pawns move forward "one diagonal", and capture forward "orthogonally".</p>
+
+<p>
+ See
+ <a href="https://www.chessvariants.com/rules/diamond-chess">
+ Diamond Chess
+ </a>
+ on chessvariants.com.
+</p>
+
+<p class="author">James Alexander Porterfield Rynd (1886).</p>