(;GM[1]FF[4]SZ[9]
GN[Wing opening]
PC[http://senseis.xmp.net/?TheArtOf9x9Go/chie717]AP[GoWiki:2009]
DT[2016-10-15]
C[Diagram from http://senseis.xmp.net/?TheArtOf9x9Go/chie717

Wing opening]
PL[B]

AB[bc][dc][ec][cd][be][ce][ee][fe][ef][cg]
AW[bd][dd][de][ge][bf][cf][df][ff][gf][eg]
CR[eg]
LB[bh:b][eh:a]

;B[dg]C[B21]MN[21]
;W[bg]C[W22]MN[22]

;CR[eg]
LB[bh:b][eh:a]
)
