p.boxed
	| You have a king and an antiking. King must stay away from checks, but antiking must always stay in check.
	| Antiking captures his own kind.

h3 Specifications

ul
	li Chessboard: standard.
	li Material: additional antiking.
	li Non-capturing moves: standard.
	li Special moves: standard.
	li Captures: special case of antiking (see below).
	li End of game: Checkmate or anti-checkmate.

h3 Basics

p
	| The additional piece is a royal figure, thus cannot be captured.
	| It captures the pieces of his color (to help checkmate opponent antiking, but by doing so it also make standard checkmate more difficult...).
	| It should always remains under check (if it cannot, game is over).

figure.diagram-container
	.diagram
		| fen:rnbqkbnr/pppppppp/3A4/8/8/3a4/PPPPPPPP/RNBQKBNR:
	figcaption Initial position (non-random). 1.Ae5 is forbidden.

h3 End of the game

p There are two ways to win:
ol
	li Checkmate opponent king
	li Anti-checkmate opponent antiking
p ...Or maybe do both at the same time?

p Note 1: athough antiking captures his color, it doesn't check his king.

p Note 2: since it would allow a basic tactic (keep antiking touching opponent's king), kings do not attack antikings.

p Note 3: an antiking does not check opponent's antiking.

h3 Credits

p
	a(href="https://www.chessvariants.com/diffobjective.dir/anti-king-chess.html") Antiking chess 
	| on chessvariants.com.