2 | If a piece captures one of the same kind, both disappear.
5 The defensive power of pawns is thus increased, because they don't fear
6 captures (by other pawns).
9 Endings are also affected quite a lot, and sometimes new threats occur:
10 on the diagram, 3.Bxg7 wins a pawn because 3...Bxg7 would make both
13 figure.diagram-container
15 | fen:r1bqkbnr/pp1ppppp/2n5/2p5/8/1P6/PBPPPPPP/RN1QKBNR:
16 figcaption After 1.b3 c5 2.Bb2 Nc6
21 a(href="https://www.chessvariants.com/rules/antimatter-chess")
23 | on chessvariants.com.
25 p Inventor: Claudio Martins Jaguaribe (2010)