(;GM[1]FF[4]SZ[7]
GN[Black to play]
PC[http://senseis.xmp.net/?PrisonerReturn]AP[GoWiki:2009]
DT[2016-10-24]
C[Diagram from http://senseis.xmp.net/?PrisonerReturn

Black to play]
PL[B]

AB[ba][ga][ab][bb][gb][cc][dc][ec][fc][gc][ed][de][ee][fe][ef][fg]
AW[da][fa][cb][db][eb][fb][ac][bc][bd][cd][ce][bf][df][cg][dg][eg]


;
)
