Most Similar Pro Game
Which two professional games are most similar?
In other words, which two diverged at the latest move number?
Fujisawa Hosai - Go Seigen, 1957-10-15,16
Fujisawa Hosai - Rin Kaiho, 1965-07-07,08
First diverged at move 74.
(Note that up to black 67 (on tengen), these were mane-go games.)
Yu Bin vs Cho Hun-hyeon, 1995-10-23 &
Ma Xiaochun vs Cho Hun-hyeon, 1995-03-20
First diverged at move 40
Yi Ch'ang-ho vs Cho Hun-hyeon, 1995-02-08 &
Yi Ch'ang-ho vs Cho Hun-hyeon, 1995-10-02
First diverged at move 39
The examples given so far have at least one pro in common. While studying the Kobayashi Fuseki, I stumbled upon an example where two 7d amateurs repeat the first 38 moves of a pro game:
Weon Seong-chin vs. Chen Yaoye (8th Samsung Cup Qualifying Preliminary, 2003-08-04)
Lee Kangwook 7d vs. Fu Li 7d (25th World Amateur Go Championship, 2004-06-10)
The pro played at , the amateur played at a. (White won both games by a small margin.)