(;GM[1]FF[4]SZ[19]
GN[Ko]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem52/Solution]AP[GoWiki:2009]
DT[2023-01-02]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem52/Solution

Ko]
PL[W]

AB[ab][gb][bc][gc][bd][gd][ee][fe][cf]
AW[bb][cc][fc][dd][ed]

;W[db]C[W1]MN[1]
;B[ba]C[B2]MN[2]
;W[ca]C[W3]MN[3]

;
)
