(;GM[1]FF[4]SZ[19]
GN[defense]
PC[http://senseis.xmp.net/?TheMagicOfGoYomiuriShimbun/Problem1SolutionDiscussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?TheMagicOfGoYomiuriShimbun/Problem1SolutionDiscussion

defense]
PL[W]

AB[oa][ob][oc][od][pd][qd][re][se][qf]
AW[ra][pb][pc][qc][rc][rd][sd]
LB[qa:a][qb:b][rb:c][sb:d]

;W[pa]C[W1]MN[1]

;LB[qa:a][qb:b][rb:c][sb:d]
)
