(;GM[1]FF[4]SZ[19]
GN[My take.]
PC[http://senseis.xmp.net/?HitachiNumber314/IntermediateSolution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?HitachiNumber314/IntermediateSolution

My take.]
PL[B]

AB[eb][gc][hc][gd][id][ce][de][ge][he][ie][ef][ff]
AW[db][ib][jb][bc][jc][bd][dd][ed][fd][jd][be][je][cf][hf][if][dg][eg][fg][gg]
LB[cb:b][cd:a]

;B[fb]C[B1]MN[1]
;W[hb]C[W2]MN[2]
;B[dc]C[B3]MN[3]

;LB[cb:b][cd:a]
)
