(;GM[1]FF[4]SZ[19]
GN[White to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem71/Solution]AP[GoWiki:2009]
DT[2023-02-01]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem71/Solution

White to play]
PL[W]

AB[ja][na][oa][qa][ib][mb][ic][mc][nc][hd][jd][ld][ke][le][jf]
AW[ha][ka][la][ma][kb][lb][nb][fc][gc][hc][kc][lc][pc][rc][id][kd][pd][fe][he][je][ne][oe][hf][if][kf][mf][kg][ih]
CR[jd]

;W[ob]C[W1]MN[1]
;B[pa]C[B2]MN[2]
;W[jc]C[W3]MN[3]
;B[jb]C[B4]MN[4]
;B[ie]C[B6]MN[6]

;CR[jd]
)
