36. If a move in a perpetual chase is an offer to exchange, it still constitutes a perpetual chase. If every move in a perpetual chase is also an offer to exchange, it still constitutes a perpetual chase. (See examples in Diagrams 90 to 93)


Diagram 90: Red (in Capital) moves first

R2=9 c1=2
R9=8 c2=1
R8=9 c1=2
R9=8 c2=1
R89 ....
Explanation:
Red offers to exchange the Cannons in every other move while its Rook is perpetually chasing the Black Cannon. This is perpetual chase and is violating the rule.

Diagram 91: Red (in Capital) moves first

R8=9 c1=2
R9=8 c2=1
R8=9 c1=2
R9=8 c2=1
R8=9 ....
Explanation:
In every move, Red chases the Black Cannon and offers to exchange simultaneously. This is still a perpetual chase and is against the rule.

Diagram 92: Red (in Capital) moves first

R5=6 r4=5
R6=5 r5=6
R5=5 r5=4
R5=6 ....
Explanation:
While offering to exchange the Rooks in each move, Red's Cannons are perpetually chasing the Black Rook. This is against the rule and Red has to change or lose.

Diagram 93: Red (in Capital) moves first

R7=8 r2=3
R8=7 r3=2
R7=8 r2=3
R8=7 r3=2
R7=8 ....

Explanation:
While offering to exchange the Rooks in each move, Red's Knights are perpetually chasing the Black Rook. This is against the rule and Red has to change or lose.

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