(;GM[1]FF[4]SZ[19]
GN[Black is captured]
PC[http://senseis.xmp.net/?TurnaroundLadder]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?TurnaroundLadder

Black is captured]
PL[B]

AB[bb][cb][gb][bc][ec][gc][ic][bd][dd][ed][fd][be][de][ee][cf][df][ef][ff][gf][cg][dg][gg][hg][ch][dh][eh][hh][ih][ei][fi][ii][ji][fj][gj][jj][kj][gk][hk][kk][lk][hl][il][ll][ml][im][jm][mm][nm][jn][kn][nn][on][ko][lo][oo][po][lp][mp][pp][qp][mq][nq][qq][rq][rr]
AW[db][eb][fb][cc][dc][fc][cd][gd][ce][fe][ge][bf][hf][bg][eg][fg][ig][bh][fh][gh][jh][ci][di][gi][hi][ki][ej][hj][ij][lj][fk][ik][jk][mk][gl][jl][kl][nl][hm][km][lm][om][in][ln][mn][pn][jo][mo][no][qo][kp][np][op][rp][lq][oq][pq][sq][mr][qr][sr][rs]

;B[nr]C[B1]MN[1]
;W[ns]C[W2]MN[2]
;B[or]C[B3]MN[3]
;W[pr]C[W4]MN[4]

;
)
