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

But ...]
PL[B]

AB[on][po][mp][np][op][mq][mr]
AW[qm][qn][pp][qp][rp][nq][oq]
LB[os:a]

;B[pr]C[B1]MN[1]
;W[pq]C[W2]MN[2]
;B[or]C[B3]MN[3]
;W[nr]C[W4]MN[4]
;B[ns]C[B5]MN[5]
;B[ps]C[B7]MN[7]
;W[qr]C[W8]MN[8]
;B[ms]C[B9]MN[9]
;W[qs]C[W10]MN[10]

;LB[os:a]
)
