| 1 | p.boxed. |
| 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. |
| 4 | |
| 5 | p. |
| 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. |
| 10 | |
| 11 | p. |
| 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. |
| 15 | |
| 16 | figure.diagram-container |
| 17 | .diagram |
| 18 | | fen:2prbkqA/2p1nnbr/2pppppp/8/8/PPPPPP2/RBNN1P2/aQKBRP2: |
| 19 | figcaption Initial setup: antikings stand in the corners. |
| 20 | |
| 21 | h3 Unusual moves |
| 22 | |
| 23 | ul |
| 24 | li. |
| 25 | Pawns are Berolina Pawns, which move diagonally forward one square |
| 26 | without capturing, or move one square straight forward to capture. |
| 27 | li. |
| 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. |
| 30 | |
| 31 | h3 End of the game |
| 32 | |
| 33 | p There are three ways to win: |
| 34 | ol |
| 35 | li Checkmate opponent king |
| 36 | li Anti-checkmate opponent antiking |
| 37 | li Give a double check, as on the following diagram |
| 38 | |
| 39 | figure.diagram-container |
| 40 | .diagram |
| 41 | | fen:2pr3A/2pb1qbr/2p1pkQp/2pnp1n1/1PPN4/PPB1PPN1/1K2RP2/a2BRP2: |
| 42 | figcaption After Qb1xg6# |
| 43 | |
| 44 | h3 More information |
| 45 | |
| 46 | p |
| 47 | a(href="https://www.chessvariants.com/diffobjective.dir/anti-king-chess.html") |
| 48 | | Antiking chess |
| 49 | | on chessvariants.com. |
| 50 | |
| 51 | p Inventor: Peter Aronson (2002) |