(;GM[1]FF[4]SZ[19]
GN[White to play]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem7/Solution]AP[GoWiki:2009]
DT[2023-01-30]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem7/Solution

White to play]
PL[W]

AB[kb][ob][ic][jc][mc][rc][ld][pd][rd][le][pe][lf][of][mg]
AW[ka][lb][qb][lc][nc][oc][pc][me]
LB[oa:b][pb:c][rb:d][md:a]

;W[kc]C[W1]MN[1]
;B[jb]C[B2]MN[2]
;W[kd]C[W3]MN[3]
;B[je]C[B4]MN[4]

;LB[oa:b][pb:c][rb:d][md:a]
)
