(;GM[1]FF[4]SZ[19]
GN[Black mistake]
PC[https://senseis.xmp.net/?XuanxuanQijingProblem259/Solution]AP[GoWiki:2009]
DT[2023-01-27]
C[Diagram from https://senseis.xmp.net/?XuanxuanQijingProblem259/Solution

Black mistake]
PL[W]

AB[ep][eq][fq][ar][br][cr][gr]
AW[bn][co][eo][fp][gp][aq][bq][cq][gq][iq][hr]

;W[bs]C[W1]MN[1]
;B[dq]C[B2]MN[2]
;W[ds]C[W3]MN[3]
;B[dr]C[B4]MN[4]
;W[fr]C[W5]MN[5]

;
)
