Here are some instances, from the exact whole-board position, in which very strong players used the “old” and “losing” (6) in exceptionally high-level games.
With a white nirensei on the board, the list is much more extensive.
A Thorough Analysis of the Chinese Opening by Feng Yun 9p, SGF lecture published through the AGA, 2021
https://senseis.xmp.net/?Tapir%2FKajiwaraStyleProbe
This is mentioned in Reducing Territorial Frameworks [1988] (by Fujisawa Hideyuki) and occurs in several games of mainly Kajiwara Takeo.
To be specific, Waltheri has the right-side formation in Kajiwara vs Yamabe Toshiro ('76), Sakata ('76), Takemiya ('77), and Kato ('77), as well as in a Chinese game from '78.
bugcat vs 7k, win by resignation after nine moves
The Manchurian was far too strong for him!
At the end I said “Five in a row, I win!”
@Clossius1 Does a win like this count for the WSC?
Sorry for the bump. I posted about the Fushigi Fuseki but then realised that I’d already done that a year ago.
