Also, I’d like to know how conditional moves worked back then.
Did they have a servant assigned and told them “if and when a letter from Mr. X arrives, open it. If it’s unrelated to Go, pretend you didn’t see it. If they say they played B4, send back the envelope I’ve marked with A. If they say they played C4, send back the envelope I’ve marked with B. If it’s neither, leave the envelope on my desk.”
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