p.boxed
  | Capturing pieces don't move.

p.
  Everything is the same as in orthodox chess, except that after capturing
  a piece, the attacker stay still.

figure.diagram-container
  .diagram.diag12
    | fen:r1bqkbnr/p1pppppp/1pn5/7Q/4P3/8/PPPP1PPP/RNB1KBNR:
  .diagram.diag22
    | fen:r1bqkbnr/p1ppp2p/1pn5/7Q/4P3/8/PPPP1PPP/RNB1KBNR:
  figcaption Left: after 1.e4 Nc6 2.Qh5 b6??. Right: after 3.Qxf7+ g6 4.Qxg6#.

p.
  This "small" difference alters the strategy a lot: guarding pieces is
  useless, for example, and the king cannot escape a distant check by
  capturing.

h3 Source

p
  a(href="https://www.chessvariants.com/difftaking.dir/rifle.html") Rifle Chess
  |  on chessvariants.com.

p Inventor: W. B. Seabrook (1921)