-For Teleport, Chakart and Hamilton at least: a piece should be attached to mouse cursor,
-waiting for a click dropping it somewhere. In BaseGame: find the appropriate place to call eg. Board::setHoverPiece(),
-which should be in effect when hovering over position only (#gamePosition), and cancelled when receiving the
-message stopHover() for example.
+https://www.chessvariants.com/diffmove.dir/balaklava.html
+
+Rampage Chess: Any Unit May move to any empty square that is guarded. A King cannot make a special move to get out of check.
+
+Swap chess: Friendly pieces may swap places