(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[https://senseis.xmp.net/?BeginnerExercise264/Solution]AP[GoWiki:2009]
DT[2022-11-09]
C[Diagram from https://senseis.xmp.net/?BeginnerExercise264/Solution

Failure]
PL[B]

AB[ob][pb][rb][mc][nc][qc][md][rd][me][mf][qf][rf][mg][mh][ni][oi][pi][qi]
AW[oc][nd][pd][qd][ne][qe][nf][of][ng][pg][nh][oh][ph]

;B[pf]C[B1]MN[1]
;W[pe]C[W2]MN[2]
;B[od]C[B3]MN[3]
;W[pc]C[W4]MN[4]

;
)
