(;GM[1]FF[4]SZ[19]
GN[Variation 2]
PC[https://senseis.xmp.net/?HitachiNumber9/Solution]AP[GoWiki:2009]
DT[2022-11-04]
C[Diagram from https://senseis.xmp.net/?HitachiNumber9/Solution

Variation 2]
PL[B]

AB[dc][ec][fc][gc][bd][cd][gd][be][ge][ff][gg]
AW[cb][hb][cc][ic][dd][ed][fd][ce][ie][bf][cf][ef][gf][hf][dg]

;B[de]C[B1]MN[1]
;W[fg]C[W2]MN[2]
;B[ee]C[B3]MN[3]
;W[bc]C[W4]MN[4]
;B[db]C[B5]MN[5]
;W[ad]C[W6]MN[6]
;B[fe]C[B7]MN[7]
;W[ae]C[W8]MN[8]
;B[gb]C[B9]MN[9]

;
)
