(;GM[1]FF[4]SZ[19]
GN[Diag 4.1 Mistake by Black]
PC[http://senseis.xmp.net/?XuanxuanQijingProblem17/Solution]AP[GoWiki:2009]
DT[2013-04-01]
C[Diagram from http://senseis.xmp.net/?XuanxuanQijingProblem17/Solution

Diag 4.1 Mistake by Black]
PL[B]

AB[oq][qq][rq][nr][or]
AW[on][pn][no][qo][ro][mp][lq][lr][pr][qr][ns]
CR[qq][rq]

;B[rs]C[B1]MN[1]
;W[pq]C[W2]MN[2]
;B[pp]C[B3]MN[3]
;W[qp]C[W4]MN[4]
;B[op]C[B5]MN[5]
;W[rr]C[W6]MN[6]

;CR[qq][rq]
)
