(;GM[1]FF[4]SZ[19]
GN[ko]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem15/Solution]AP[GoWiki:2009]
DT[2023-01-02]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem15/Solution

ko]
PL[B]

AB[bb][fb][cc][dc][ec][cd]
AW[ab][gb][bc][gc][bd][dd][fd][ce][de]
LB[be:a]

;B[ca]C[B1]MN[1]
;W[db]C[W2]MN[2]
;B[aa]C[B3]MN[3]

;LB[be:a]
)
