-p.boxed
- | You have a king and an antiking. King cannot be let in check, but antiking
- | must always stay under check. Antiking captures his own kind.
+p.boxed.
+ You have a king and an antiking. King cannot be let in check, but antiking
+ must always stay under 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.
+ A new piece is introduced: the antiking, noted by the letter 'A' in diagrams
+ and PGNs. This piece must always remain under (orthodox) check: it is
+ considered in (anti-)check when not attacked by any enemy piece. In such a
+ situation, the antiking must move immediately to an attacked square.
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).
+ The antiking is a royal figure, and thus cannot be captured.
+ It captures only the pieces of his color (to help checkmating the opponent's
+ antiking, but this also complicates standard checkmate).
figure.diagram-container
.diagram
| fen:rnbqkbnr/pppppppp/3A4/8/8/3a4/PPPPPPPP/RNBQKBNR c5,d5,e5:
figcaption Marked squares are not allowed antiking moves.
+ul
+ li.
+ Although antiking captures his color, it doesn't check his king - it
+ doesn't check the opponent's king either.
+ li.
+ Since it would allow a basic tactic (keep antiking touching opponent's
+ king), kings do not attack antikings.
+
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 -
- it doesn't check the opponent's king either.
+ ...Or do both at the same time, as on the following diagram after 3.Qxf7#
+ (the black antiking was on g3).
-p.
- Note 2: since it would allow a basic tactic (keep antiking touching opponent's
- king), kings do not attack antikings.
+figure.diagram-container
+ .diagram
+ | fen:rnbqkbnr/pppp1Qpp/1A6/4p3/4P2a/8/PPPP1PPP/RNB1KBNR h4,e8:
+ figcaption After 1.e4 e5 2.Qh5 Ah4?? 3.Qxf7#
-h3 Source
+h3 More information
p
a(href="https://www.chessvariants.com/diffobjective.dir/anti-king-chess.html")