(;GM[1]FF[4]SZ[19]
GN[Simpler way]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem67/Solution]AP[GoWiki:2009]
DT[2023-02-01]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem67/Solution

Simpler way]
PL[W]

AB[ra][ob][pb][qb][qd][re][sf][qg][rg]
AW[sa][nb][rb][sb][nc][oc][pc][sc][sd][oe][se][pf][qf][oh][pi][ri]
CR[sb]
LB[qc:a]

;W[rf]C[W1]MN[1]
;B[sg]C[B2]MN[2]
;W[oa]C[W3]MN[3]
;B[rc]C[B4]MN[4]
;W[pa]C[W5]MN[5]
;B[rd]C[B6]MN[6]

;CR[sb]
LB[qc:a]
)
