(;GM[1]FF[4]SZ[13]
GN[Problem 1: Ko]
PC[http://senseis.xmp.net/?posting=1683]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?posting=1683

Problem 1: Ko]
PL[B]

AB[aj][bj][cj][dj][ej][fj][gj][hj][ij][jj][kj][ik][jk][lk][el][fl][gl][hl][ll]
AW[ak][bk][ck][dk][ek][fk][gk][hk][kk][dl][il][jl][kl][lm]

;B[dm]C[B1]MN[1]
;W[cm]C[W2]MN[2]
;B[bl]C[B3]MN[3]
;W[hm]C[W4]MN[4]
;B[gm]C[B5]MN[5]
;W[jm]C[W6]MN[6]

;
)
