29. A Pawn can perpetually chase. Two or more Pawns can work together
to perpetually chase. If one of the moves of the Pawn's perpetual chase
involves a Rook, Cannon, or Knight, it is still allowed.
(See example in Diagram 69 and 70)
Diagram 69: Red (in Capital) moves first
P21 c98
P12 c89
P21 c98
P12 ...
Explanation:
A Pawn can perpetually chase. This game is a draw.
Diagram 70: Red (in Capital) moves first
P23 n7-8
P32 n8+7
P23 n7-8
P32 n8+7
P23 ....
Explanation:
The Red Pawn, with the help of the Cannon, perpetually chases the
Black Knight. This is allowed. However, if Red has another Cannon
in the third file, it will be an illegal perpetual chase.