(;GM[1]FF[4]SZ[19]
GN[Variation]
PC[http://senseis.xmp.net/?RTGProblem15/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem15/Solution

Variation]
PL[B]

AB[oa][pb][oc][pc][qc][ld][od][le][me][ne][oe][pe][lf][pf]
AW[ma][lb][nb][ob][jc][lc][nc][kd][md][nd][pd][qd][rd][kf][qf][rf][kg][lh][mh][nh][oh][ph][qh]
LB[mg:a][og:b]

;B[sb]C[B1]MN[1]
;W[qa]C[W2]MN[2]
;B[ng]C[B3]MN[3]
;W[pa]C[W4]MN[4]
;B[ra]C[B5]MN[5]
;W[rc]C[W6]MN[6]
;B[rb]C[B7]MN[7]

;LB[mg:a][og:b]
)
