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With this shifted guard... If there's a guard on the passage – shifted, damaged by the opponent – then please, finish it off (if there are any guards left). It would be fair and logical. Attempts to create "freebies" will only lead to more misunderstandings. It's simple. If a guard is present (detected) on the passage, it must be killed (regardless of whether the opponent attacked it), and then the passage can be traversed.