|Searching for the Empty 9x9 Board|
The search in the 176 game 9x9 collection show that the center point is by far the most frequently played and san-san is the least popular opening in the collection.
For your amusement the most normal game is shown in the game
browser. This game was found by continuously expanding branch
[a] in the variation browser. The game features
Sumi Shinsuke (playing black) versus Minematsu Masaki and was played on
the 5th of March 1988. White won this game by 6.5 point.