(;GM[1]FF[4]SZ[19]
GN[Seki.]
PC[http://senseis.xmp.net/?BeginnerExercise200/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise200/Solution

Seki.]
PL[B]

AB[hh][ih][gi][ii][li][gj][lj][gk][hk][ik][jk][kk][lk]
AW[gg][hg][ig][gh][jh][kh][lh][fi][mi][fj][hj][mj][fk][mk][gl][hl][il][jl][kl][ll]

;B[ki]C[B1]MN[1]
;W[jj]C[W2]MN[2]
;B[ji]C[B3]MN[3]
;W[ij]C[W4]MN[4]

;
)
