(;GM[1]FF[4]SZ[5]
GN[White plays a white stone at W1.]
PC[http://senseis.xmp.net/?RulesOfGoIntroductory]AP[GoWiki:2009]
DT[2018-04-05]
C[Diagram from http://senseis.xmp.net/?RulesOfGoIntroductory

White plays a white stone at W1.]
PL[W]

AB[ba][cb][db][dc]
AW[bb][cc][cd]

;W[ab]C[W1]MN[1]

;
)
