(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[https://senseis.xmp.net/?GokyoShumyoSection6Problem70/Solution]AP[GoWiki:2009]
DT[2023-01-22]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection6Problem70/Solution

Solution]
PL[B]

AB[db][cc][dc][ec][fc][kc][lc][gd][id][jd][ee][ie]
AW[bb][cb][bc][gc][hc][cd][fd][kd][ge][he][je][df][if][fg]
LB[ga:b][ic:a]

;B[ib]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[ha]C[B3]MN[3]

;LB[ga:b][ic:a]
)
