(;GM[1]FF[4]SZ[19]
GN[Bent four in the corner]
PC[http://senseis.xmp.net/?UnderTheStonesProblem9/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?UnderTheStonesProblem9/Solution

Bent four in the corner]
PL[B]

AB[rp][sp][rq][sq][lr][mr][nr][or][pr][qr]
AW[pn][qo][ro][so][lq][mq][nq][oq][pq][qq][ir][jr][kr][ls][ns][qs][rs][ss]

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

;
)
