(;GM[1]FF[4]SZ[19]
GN[White to play and cut Black groups]
PC[https://senseis.xmp.net/?GokyoShumyoSection7Problem18/Solution]AP[GoWiki:2009]
DT[2023-01-25]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection7Problem18/Solution

White to play and cut Black groups]
PL[W]

AB[dk][gk][ik][dl][fl][jl][fn][in][eo][io][dq][eq][iq][jq]
AW[cl][cm][gm][hm][co][go][ho][cp][cq][fq][gq][hq]

;W[en]C[W1]MN[1]
;B[dn]C[B2]MN[2]
;W[em]C[W3]MN[3]

;
)
