Shimada's ko

Shimada's ko is a kind of cycle, a repeating board position, first described by Shimada Takuji in his book "The mathematics of Go" (囲碁の数理).

Shimada's ko

More information about the cycle is presented at the following URLs:

• http://www.britgo.org/rules/molasses.html
• http://harryfearnley.com/go/shimada/intro.html