(;GM[1]FF[4]SZ[19]
GN[Ko threats]
PC[http://senseis.xmp.net/?BeginnerExercise211/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise211/Solution

Ko threats]
PL[W]

AB[hh][ih][jh][hi][ji][ki][li][hj][jj][hk][kk][lk][il][jl][kl]
AW[hg][ig][jg][kg][gh][kh][lh][mh][gi][mi][gj][kj][lj][mj][gk][mk][gl][hl][ml][im][jm][km][lm]
CR[kj]

;W[ik]C[W1]MN[1]
;B[ij]C[B2]MN[2]
;W[ll]C[W5]MN[5]
;B[jk]C[B6]MN[6]

;CR[kj]
)
