(;GM[1]FF[4]SZ[19]
GN[Problem 3]
PC[http://senseis.xmp.net/?UnderTheStonesProblem3/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?UnderTheStonesProblem3/Solution

Problem 3]
PL[B]

AB[an][bn][co][bp][aq][bq]
AW[bl][dl][cm][dn][ao][do][cq][dq][eq][fq][ar][br][fr][as][ds][es][fs]

;B[cr]C[B1]MN[1]

;
)
