37. When A's Rook and King are controlled by B's Rook and Cannon, A cannot use a Knight or Cannon to perpetually chase B's Rook. (See examples in Diagrams 94 through 96)


Diagram 94: Red (in Capital) moves first

H4-2 r6=7
H2+4 r7=6
H4-2 r6=7
H2+4 r7=6
H4-2 ....

Diagram 95: Red (in Capital) moves first

H4-2 r8=7
H2+4 r7=8
H4+2 r8=7
H2-1 r7=8
H1+2 ....

Explanation:
In Diagrams 94 and 95 the Red Knight is perpetually chasing the Black Rook. Red has to change or loses.

Diagram 96: Red (in Capital) moves first

C9-6 r6-1
C9+1 r6-1
C9+1 r6+2
C9-2 r6-1
C9+1 ....

Explanation:
Red's Cannon is perpetually chasing the Black Rook. Red is violating the rule.

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