(;GM[1]FF[4]SZ[19]
GN[White's ko threats]
PC[http://senseis.xmp.net/?HaneDescend]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?HaneDescend

White's ko threats]
PL[W]

AB[ea][eb][hb][ib][dc][ic][dd][de]
AW[ga][fb][gb][ec][hc][ed][hd][id][ee]

;W[db]C[W1]MN[1]
;B[cb]C[B2]MN[2]
;W[fa]C[W3]MN[3]
;B[da]C[B4]MN[4]
;W[ca]C[W5]MN[5]
;B[ba]C[B6]MN[6]

;
)
