(;GM[1]FF[4]SZ[19]
GN[Idea 3, black takes corner--ko]
PC[http://senseis.xmp.net/?PositionalJudgementProblem2/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?PositionalJudgementProblem2/Discussion

Idea 3, black takes corner--ko]
PL[B]

AB[bk][gk][ik][lk][mk][qk][il][jl][kl][ol][pl][gm][hm][nm][an][in][mn][nn][ao][io][ko][lo][po][ap][bp][jp][kp][aq][cq][kq][pq][br][kr][bs][cs]
AW[jk][kk][nk][ok][bl][cl][ll][ml][nl][am][im][jm][km][lm][mm][bn][cn][hn][bo][ho][cp][dp][ip][lp][dq][hq][jq][lq][cr][er][ir][jr][ds]
LB[dr:a]


;LB[dr:a]
)
