2 You have a king and an antiking. King cannot be let in check, but antiking
3 must always stay under check. Antiking captures his own kind.
6 A new piece is introduced: the antiking, noted by the letter 'A'.
7 This piece must always remain under (orthodox) check: it is
8 considered in (anti-)check when not attacked by any enemy piece. In such a
9 situation, the antiking must move immediately to an attacked square.
12 The antiking is a royal figure, and thus cannot be captured.
13 It captures only the pieces of his color.
14 Antikings don't give check, and kings do not attack antikings.
16 figure.diagram-container
18 | fen:2prbkqA/2p1nnbr/2pppppp/8/8/PPPPPP2/RBNN1P2/aQKBRP2:
19 figcaption Initial setup: antikings stand in the corners.
25 Pawns are Berolina Pawns, which move diagonally forward one square
26 without capturing, or move one square straight forward to capture.
28 If a King or Anti-King has not yet moved, it may make as its first
29 move a Knight's leap to an empty square.
33 p There are three ways to win:
35 li Checkmate opponent king
36 li Anti-checkmate opponent antiking
37 li Give a double check, as on the following diagram
39 figure.diagram-container
41 | fen:2pr3A/2pb1qbr/2p1pkQp/2pnp1n1/1PPN4/PPB1PPN1/1K2RP2/a2BRP2:
42 figcaption After Qb1xg6#
47 a(href="https://www.chessvariants.com/diffobjective.dir/anti-king-chess.html")
49 | on chessvariants.com.
51 p Inventor: Peter Aronson (2002)