It's late in the endgame. Neither player has a ko threat of any significant size. See how much damage you can do to the Black group.
(;GM[1]FF[4]AP[glGo:1.2-Beta2]ST[1]
SZ[19]KM[6.5]
PW[White]PB[Black]DT[2005-06-08]
AB[da][db][eb][ec][fc][gc][ha][ib][ic][hc]AW[ia][ja][jb][jc][jd][id][hd][gd][fd][ed][dd][dc][cc][cb][ca]
(;W[fa]
;B[gb]
;W[ga]
;B[fb]
;W[hb]C[With no ko threats as large as this group, Black loses. RIGHT])
(;W[ga]
;B[fa]
(;W[hb]
;B[gb]C[Black lives unconditionally. The invasion was worth four points in gote (if you save your stones), but you could have done better.])
(;W[gb]
;B[hb]))
(;W[gb]
;B[fa]
(;W[ga]
;B[hb])
(;W[hb]
;B[ga])))