(;GM[1]FF[4]SZ[19]
GN[Bad defense]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem49/Solution]AP[GoWiki:2009]
DT[2023-01-20]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem49/Solution

Bad defense]
PL[B]

AB[fc][gc][ic][ad][bd][cd][dd][ed][gd][bg][ci]
AW[cb][eb][bc][ec][fd][be][fe][cf][ef][cg]
LB[bf:a]

;B[ea]C[B1]MN[1]
;W[da]C[W2]MN[2]
;B[dc]C[B3]MN[3]
;W[db]C[W4]MN[4]
;B[bb]C[B5]MN[5]
;W[ab]C[W6]MN[6]
;B[ba]C[B7]MN[7]
;W[cc]C[W8]MN[8]
;B[fb]C[B9]MN[9]
;W[fa]C[W10]MN[10]

;LB[bf:a]
)
