(;GM[1]FF[4]SZ[19]
GN[Can black capture the seven stones at the bottom by playing ''a''? (177 moves)]
PC[http://senseis.xmp.net/?NakayamaLadderProblem]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?NakayamaLadderProblem

Can black capture the seven stones at the bottom by playing ''a''? (177 moves)]
PL[B]

AB[fd][fe][bf][cf][df][ef][ff][gf][hf][if][jf][ag][fg][kg][ah][fh][kh][ai][fi][ki][bj][cj][dj][ej][fj][gj][hj][ij][jj][fk][fl][jn][fo][jo][no][fp][jp][np][fq][jq][nq][gr][hr][ir][jr][kr][lr][mr]
AW[ea][ab][sb][sc][dd][ed][gd][ae][ee][ge][he][ie][je][le][re][af][kf][bg][cg][dg][sg][ch][dh][eh][lh][bi][ci][di][ei][aj][kj][sj][ak][bk][gk][jk][bl][dl][hl][gm][en][ao][oo][er][nr][rr][bs][gs][hs][is][js][ks][ls][ms][os]
LB[fs:a]


;LB[fs:a]
)
