(;GM[1]FF[4]SZ[19]
GN[Black to play and connect underneath]
PC[http://senseis.xmp.net/?GokyoShumyoSection6Problem73]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection6Problem73

Black to play and connect underneath]
PL[B]

AB[ba][bb][gb][bc][cc][gc][cd][fd][ce][fe][ff][eg]
AW[ab][cb][fb][ac][dc][fc][ae][de][ee][bf][cf][dg][ch]


;
)
