(;GM[1]FF[4]SZ[19]
GN[Black to play and connect underneath]
PC[http://senseis.xmp.net/?GokyoShumyoSection6Problem1/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection6Problem1/Attempts

Black to play and connect underneath]
PL[B]

AB[hb][cc][gc][dd][hd][de][df][gf]
AW[ib][jb][ec][fd][jd][ge][ef][jf][gg][hg]
SQ[gf]
LB[fb:b][dc:a]

;B[fe]C[B1]MN[1]
;W[gd]C[W2]MN[2]
;B[he]C[B3]MN[3]
;W[ff]C[W4]MN[4]
;B[ee]C[B5]MN[5]
;W[hf]C[W6]MN[6]
;B[fc]C[B7]MN[7]
;W[ed]C[W8]MN[8]
;B[eb]C[B9]MN[9]
;W[db]C[W10]MN[10]

;SQ[gf]
LB[fb:b][dc:a]
)
