h3 Basics
-p
- | Instead of a normal move, a piece may be exchanged with an adjacent friendly one.
- | Switching can move pawns until rank 1 or final rank. In the first case a 2-squares,
- | jump is possible, and in the second a promotion occurs.
- | Switching must involves two different units.
- | Switching while the king is under check is not allowed.
+p.
+ Instead of a normal move, a piece may be exchanged with an adjacent friendly one.
+ Switching can move pawns until rank 1 or final rank. In the first case a 2-squares
+ jump is possible, and in the second a promotion occurs.
+ Switching must involves two different units.
+ Switching while the king is under check is not allowed.
p.
Notation: a switch move is marked by the capital letter 'S' followed by