(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[https://senseis.xmp.net/?HikaruProblem3/Discussion]AP[GoWiki:2009]
DT[2023-02-07]
C[Diagram from https://senseis.xmp.net/?HikaruProblem3/Discussion

Solution]
PL[B]

AB[bk][ck][dk][el][cm][em][en][do][eo][fo][fp][bq][fq][cr][dr][er]
AW[bl][cl][dl][bm][dm][co][bp][cp][dp][ep][eq]
LB[an:a]

;B[cn]C[B1]MN[1]
;W[dn]C[W2]MN[2]
;B[ap]C[B3]MN[3]
;W[al]C[W4]MN[4]

;LB[an:a]
)
