(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?RTGProblem47/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem47/Solution

Solution]
PL[B]

AB[bm][cn][en][bo][eo][go][ap][bp][cp][ep][hp][ip][bq][eq][iq][ir][kr][cs][gs]
AW[co][do][dp][cq][dq][fq][gq][hq][br][dr][er][fr][hr][as][es][hs][is]

;B[ar]C[B11]MN[11]
;W[aq]C[W12]MN[12]
;B[bs]C[B13]MN[13]

;
)
