Anti-King Chess vs Maximummer

Anti-King Chess is a fairy-chess variant built around an anti-king, a piece governed by the reverse of the usual check condition. The anti-king must remain under attack, so a move that leaves it unattacked is illegal in the standard form of the variant; this reverses the normal rule that a king may not be in check. The game is for chess-variant players studying how a changed royal-piece rule alter...

Maximummer is a fairy-chess condition that changes how one side selects a move without changing the ordinary chessboard or pieces. On Black's turn, the legal move with the greatest geometric distance between its starting and ending squares must be played; the distance is measured on the board rather than by the value of the piece or the number of captured pieces. White's moves are not subject to t...