Black to separate white's two groups.
There are two ways.
(;SZ[13]AW[ib]AW[jb]AW[kc]AW[lc]AW[ld]AW[kf]AW[kg]AW[lh]AW[li]AW[lj]AB[jc]AB[jd]AB[kd]AB[je]AB[jf]AB[jg]AB[kh]AB[ki]AB[kj]AB[kk]AB[lk]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.50]PW[Vit]PB[Svart]
(;B[le]
(;W[lf]
(;B[mf];W[mg];B[me]C[White can't cut of the black stones, white dies.CHOICERIGHT]C[
CHOICERIGHT])
(;B[me]
(;W[ke]
(;B[mf];W[lg]C[White has connected.])
(;B[md];W[mc]C[White has connected.];B[mf];W[lg]C[White has connected.]))
(;W[mf]))
(;B[md]
(;W[ke]C[White has connected.])
(;W[mc];B[me];W[ke];B[mf];W[lg]C[White has connected.]))
(;B[ke];W[me]C[White has connected.]))
(;W[me]
(;B[mf]
(;W[ke];B[lg];W[lf];B[le]C[Snap-backCHOICERIGHT]C[ CHOICERIGHT])
(;W[lf];B[md];W[mg];B[me]C[White dies.]))
(;B[lf];W[lg]
(;B[ke];W[mf])
(;B[mf];W[ke]C[White has connected.]))))
(;B[lg];W[lf];B[le];W[me];B[ke];W[mg]C[White has connected.])
(;B[lf];W[le]
(;B[lg];W[ke]C[White has connected.])
(;B[ke];W[lg]C[White has connected.]))
(;B[ke];W[le]C[White has connected.]))