(;GM[1]FF[4]SZ[19]
GN[Ko]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem71/Solution]AP[GoWiki:2009]
DT[2023-01-02]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem71/Solution

Ko]
PL[W]

AB[oa][nb][mc][nc][oc][rd][ne][re][of][pf][qf]
AW[ob][pc][qc][rc][od][qd][oe][pe]

;W[qb]C[W1]MN[1]
;B[qe]C[B2]MN[2]
;W[pa]C[W3]MN[3]

;
)
