(;GM[1]FF[4]SZ[19]
GN[Ko]
PC[https://senseis.xmp.net/?GokyoShumyoSection4Problem30/Solution]AP[GoWiki:2009]
DT[2022-12-29]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection4Problem30/Solution

Ko]
PL[B]

AB[gb][ec][fc][cd][dd][fd][be][ge][df][gf][cg]
AW[hb][bc][cc][dc][gc][ic][bd][ed][gd][ee][fe]

;B[db]C[B1]MN[1]
;W[da]C[W2]MN[2]
;B[cb]C[B3]MN[3]
;W[eb]C[W4]MN[4]
;B[fb]C[B5]MN[5]
;W[fa]C[W6]MN[6]

;
)
