6. Under any circumstance, the side that perpetually checks with one piece or several pieces will be ruled as loss. (See examples in Diagram 1, 2, and 3.)
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Diagram 1: Red moves
R2+1 k6+1
R2-1 k6-1 R2+1 k6+1 R2-1 ....
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R4=5 k5=6
R5=4 k6=5 R4=5 k5=6 R5=4 ...
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R4+1 k4+1
R5=6 k4=5 R6=5 k5=4 R4-1 k4-1 R4+1 ....
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