(;GM[1]FF[4]SZ[19]
GN[White makes 1st threat]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem162/Attempts]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem162/Attempts

White makes 1st threat]
PL[B]

AB[ql][qm][rm][qn][qo][ro][qp][rp][pq][pr][rr][qs][rs]
AW[pk][qk][rk][pl][sl][pm][sm][pn][so][op][pp][sp][nq][rq][nr][sr]

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

;
)
