(;GM[1]FF[4]SZ[19]
GN[The corner]
PC[http://senseis.xmp.net/?BQM14]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM14

The corner]
PL[B]

AW[an][bn][cn][dn][en][fn][fo][fp][fq][fr][fs]
LB[ar:a][bs:b]

;B[cq]C[B1]MN[1]
;W[bp]C[W2]MN[2]
;B[bq]C[B3]MN[3]
;W[dr]C[W4]MN[4]
;B[cr]C[B5]MN[5]

;LB[ar:a][bs:b]
)
