(;GM[1]FF[4]SZ[19]
GN[var]
PC[http://senseis.xmp.net/?RTGProblem40/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem40/Solution

var]
PL[B]

AB[qo][ro][mp][op][pp][oq][sq][nr][pr][qr][ns]
AW[rm][pn][po][qp][rp][sp][pq][qq][or][rr][os]

;B[sr]C[B1]MN[1]
;W[so]C[W2]MN[2]
;B[sn]C[B3]MN[3]

;
)
