The Shusaku opening, or Shusaku fuseki (秀策流布石), is a famous[1][2] traditional fuseki for black stones in the game of Go.
It was developed to perfection (but not invented) by Honinbo Shusaku[3] and passed down to the Meiji, Taishō, and Shōwa eras.
[4] With its variants, it constituted the basis of the major theories of fuseki for nearly a century, until the 1930s, at which point the introduction of komidashi and major innovations under the shinfuseki opening occurred.
[5] However, as a testimony to its effectiveness, this type of opening is still played by professionals when playing without a komi handicap.
[8] The opening was displayed in a Google doodle on 6 June 2014 – the 185th anniversary of Honinbo Shusaku's birth.