(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[https://senseis.xmp.net/?KyuExercise204/Solution]AP[GoWiki:2009]
DT[2022-12-19]
C[Diagram from https://senseis.xmp.net/?KyuExercise204/Solution

Failure]
PL[B]

AB[co][cp][dp][bq][dq][eq]
AW[bm][cn][dn][ao][bo][eo][fp][cq][fq][fr][bs][fs]
LB[bp:a][br:b]

;B[cr]C[B1]MN[1]
;W[ds]C[W2]MN[2]
;B[cs]C[B3]MN[3]
;W[dr]C[W4]MN[4]

;LB[bp:a][br:b]
)
