(;GM[1]FF[4]SZ[19]
GN[Black to play.  Can he save his marked stone?]
PC[http://senseis.xmp.net/?LongestLadderProblem]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?LongestLadderProblem

Black to play.  Can he save his marked stone?]
PL[B]

AB[qa][ra][ab][ac][dc][ec][qd][fe][ge][qe][of][hg][ig][og][mh][ji][ki][mi][ik][il][gm][km][lm][bn][cn][gn][eo][mo][no][ap][cp][ep][oq][pq][sq][ar][sr][as][ds]
AW[ao][bo][do][dp][aq][bq][br]
SQ[ap]


;SQ[ap]
)
