(;GM[1]FF[4]SZ[19]
GN[Local ko-threat]
PC[http://senseis.xmp.net/?BeginnerExercise259/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise259/Solution

Local ko-threat]
PL[W]

AB[ck][dk][hl][cm][dm][gm][lm][cn][fn][hn][do][go][io][ko][lo][mo][cp][dp][gp][hp][ip][mp][dq][fq][gq][mq][cr][dr][er][fr][ds]
AW[fk][hk][ik][gl][jl][fm][jm][bn][dn][en][in][jn][bo][co][eo][fo][jo][bp][ep][jp][kp][lp][bq][cq][eq][hq][iq][br][gr][hr][bs][cs]

;W[em]C[W1]MN[1]
;B[fs]C[B2]MN[2]
;W[gn]C[W3]MN[3]

;
)
