(;GM[1]FF[4]SZ[19]
GN[Failure 4]
PC[http://senseis.xmp.net/?OD1PAug9Problem/Failure]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?OD1PAug9Problem/Failure

Failure 4]
PL[B]

AB[np][op][pp][qp][oq][rq][sq][or]
AW[ql][qn][mo][no][oo][ro][mp][rp][jq][lq][nq][qq][nr][pr]
LB[pq:a]

;B[qs]C[B1]MN[1]
;W[ps]C[W2]MN[2]
;B[os]C[B3]MN[3]
;W[rr]C[W4]MN[4]

;LB[pq:a]
)
