(;GM[1]FF[4]SZ[19]
GN[Failure]
PC[http://senseis.xmp.net/?KyuExercise21/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise21/Solution

Failure]
PL[B]

AB[hb][ib][cc][ic][fd][hd][id][jd][kd][ee][fe][ge][ie][jf][eg][gg][gh][gi][ki]
AW[cb][bc][fc][gc][hc][jc][kc][lc][ad][cd][dd][ed][gd][ld][be][he][me][cf][hf][if][nf][mg][hh][ih][jh][kh][lh]

;B[fb]C[B1]MN[1]
;W[ec]C[W2]MN[2]
;B[gb]C[B3]MN[3]
;W[ke]C[W4]MN[4]

;
)
