I didn’t realize what the little arrow did when I responded. If you read the quote in context (see link to the Newsweek article), you’ll find the quoted words were introduced by:
“An interesting recent article compared the difference in the diplomatic style of China and the United States to their intellectual games–the West’s chess and Chinese neiji [sic], better known by the Japanese name of go.”
So it wasn’t Kissinger’s own observation; he was just repeating what he had read elsewhere (with no attribution, as far as I can see).