(;GM[1]FF[4]SZ[19]
GN[Defend or not?]
PC[http://senseis.xmp.net/?EndgameConnectOrNot]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?EndgameConnectOrNot

Defend or not?]
PL[W]

AB[do][eo][fo][go][ho][io][jo][dp][jp][dq][gq][iq][jq][dr][jr][js]
AW[ao][bo][co][cp][hp][ip][cq][cr]
LB[er:a][fs:b]

;W[ds]C[W1]MN[1]
;B[es]C[B2]MN[2]
;W[cs]C[W3]MN[3]

;LB[er:a][fs:b]
)
