(;GM[1]FF[4]SZ[19]
GN[Solution 2]
PC[http://senseis.xmp.net/?RTGProblem20/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem20/Solution

Solution 2]
PL[B]

AB[oa][qa][ob][pb][nc][pc][od][pd][qd][rd]
AW[ra][mb][nb][mc][qc][rc][md][sd][ne][oe][pe][qe][re][se]
CR[qa]
LB[nd:a]

;B[sb]C[B1]MN[1]
;W[qb]C[W2]MN[2]
;B[sc]C[B3]MN[3]
;W[pa]C[W4]MN[4]

;CR[qa]
LB[nd:a]
)
