(;GM[1]FF[4]SZ[19]
GN[Idea 3, with correct white response]
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, with correct white response]
PL[B]

AB[bk][gk][ik][lk][mk][qk][il][jl][kl][ol][pl][gm][hm][nm][in][mn][nn][io][ko][lo][po][jp][kp][kq][pq][kr]
AW[jk][kk][nk][ok][cl][ll][ml][nl][im][jm][km][lm][mm][cn][hn][ho][dp][ip][lp][hq][jq][lq][ir][jr]
LB[am:b][bm:a][go:d][bp:b][gp:c]

;B[an]C[B1]MN[1]
;W[bo]C[W2]MN[2]
;B[ao]C[B3]MN[3]
;W[ap]C[W4]MN[4]

;LB[am:b][bm:a][go:d][bp:b][gp:c]
)
