(;GM[1]FF[4]SZ[19]
GN[Black to play and connect underneath]
PC[http://senseis.xmp.net/?GokyoShumyoSection6Problem25/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection6Problem25/Attempts

Black to play and connect underneath]
PL[B]

AB[ga][cb][gb][dc][fc][hc][dd][hd][ce][ee][he][cf][if][ig]
AW[db][fb][hb][ib][ec][jc][ed][de][ge][ie][je][ef][gf][hf]
LB[fa:a]

;B[ea]C[B1]MN[1]
;W[eb]C[W2]MN[2]
;B[fd]C[B3]MN[3]
;W[fe]C[W4]MN[4]
;B[da]C[B5]MN[5]

;LB[fa:a]
)
