2 | In addition to standard moves, a piece can be exchanged
3 | with an adjacent friendly unit.
6 Instead of a normal move, a piece may be exchanged with an adjacent
7 friendly one. Switching can move pawns until rank 1 or final rank.
8 In the first case a 2-squares jump is possible, and in the second a
10 Switching must involves two different units.
11 Switching while the king is under check is not allowed.
14 Notation: a switch move is marked by the capital letter 'S' followed by
15 the exchanged squares. Example in diagram: Sb8c8.
17 figure.diagram-container
19 | fen:1RB3k1/5ppp/8/8/8/8/8/K7:
20 figcaption White can mate in 1 by switching b8-c8
23 Note: to trigger a switch move involving the king, select the non-royal
24 piece first (to not interfere with castling).
29 a(href="https://www.chessvariants.com/diffmove.dir/switching.html") Switching chess
30 | on chessvariants.com.
32 p Inventor: Tony Quintanilla (2004)