(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem26/Solution]AP[GoWiki:2009]
DT[2017-03-18]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem26/Solution

Failure]
PL[B]

AB[qo][ro][so][qp][oq][pq][qq][os]
AW[ql][rm][pn][po][np][pp][rp][nq][rq][nr][qr][qs]

;B[sr]C[B1]MN[1]
;W[rr]C[W2]MN[2]
;B[pr]C[B3]MN[3]
;W[ss]C[W4]MN[4]

;
)
