(;GM[1]FF[4]SZ[19]
GN[Answer]
PC[http://senseis.xmp.net/?OD1PJuly31Problem/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?OD1PJuly31Problem/Discussion

Answer]
PL[B]

AB[dn][fn][ho][bp][dp][ep][fp][ip][cq][iq][br][gr][ir][is]
AW[gp][dq][eq][fq][hq][cr][hr][cs][es]
LB[gq:a][dr:b]

;B[fr]C[B1]MN[1]
;W[gs]C[W2]MN[2]
;B[hs]C[B3]MN[3]
;W[fs]C[W4]MN[4]
;B[er]C[B5]MN[5]
;W[ds]C[W6]MN[6]

;LB[gq:a][dr:b]
)
