In traditional chess, en passant (Fr: "in passing") is a capture that is allowed when a player uses a two square initial pawn move to jump past a possible capture by an opposing pawn. In Sovereign Chess, however, pawns tend to move parallel to one another,
Figure 10: Navy Pawn Move to Avoid Capture
Figure 11: Violet Pawn Response to Threaten Navy
Consider the position in Figure 10, where Navy and Violet are controlled by different players. The player controlling the Navy pieces may want to advance the pawn from o6 to m6, in order to avoid capture by the Violet pawn at o7. However, even while en passant capture is not possible by the player controlling Violet, they may still move the Violet pawn from o7 to n7 to put pressure on the Navy pawn now at m6.
The ultimate destination of a pawn is seen in Rule #9...