-p TODO
+p.boxed
+ | Either enter the arena, or capture something inside.
+ | The arena is the 4x8 rectangle in the middle of the board.
+
+ul
+ li.
+ In addition to its usual movement, a pawn can capture diagonally backward.
+ li.
+ The king and queen are replaced with dukes.
+ A duke may move up to 3 spaces in any direction.
+ Dukes may move into check as they please,
+ but if a player loses both of his dukes, he loses.
+
+p.
+ The 4x8 area in the center of the board (the area in which no pieces start)
+ is known as the Arena. A piece that is not currently in the Arena may only move
+ if it is to enter the Arena. A piece which is currently in the Arena may
+ only move to capture something in the Arena.
+
+p A player wins if:
+ul
+ li He captures both of his opponent's Dukes.
+ li.
+ His opponent has no pieces left in the Arena at the end of any turn
+ other than the first.
+ li His opponent cannot make a move.
+
+figure.diagram-container
+ .diagram
+ | fen:brnkqrnb/pppppppp/8/8/8/8/PPPPPPPP/QNRBBKNR:
+ figcaption After the moves 1.e4 Nd6 2.Bg4 Nxe4.
+
+p.
+ In the diagram situation, the g4 bishop cannot take anything in the Arena,
+ and thus cannot move. Note that 1...d5?? 2.exd5 1-0, because black would have
+ no pieces in the Arena.
+
+h3 Source
+
+p
+ a(href="https://www.chessvariants.com/32turn.dir/arenachess.html") Arena chess
+ | on chessvariants.com.