(;GM[1]FF[4]SZ[19]
GN[Ko]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem121/Solution]AP[GoWiki:2009]
DT[2023-02-03]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem121/Solution

Ko]
PL[B]

AB[mb][rb][mc][rc][ld][md][rd][ne][qe][qf]
AW[kb][qb][jc][lc][nc][qc][ke][me][pe][mf][nf][pf]

;B[oa]C[B1]MN[1]
;W[ob]C[W2]MN[2]
;B[nb]C[B3]MN[3]
;W[pa]C[W4]MN[4]
;B[oc]C[B5]MN[5]
;W[pc]C[W6]MN[6]

;
)
