Black is engaged into a difficult fight. The last marked move may allow some tactical sequence. Or not.
(;AB[ea]AW[fa]AW[ga]AW[ha]AW[gb]AW[gc]AW[hc]AW[ib]AB[jb]AB[jc]AB[ic]AB[lc]AB[mc]AW[nb]AW[nc]AW[md]AW[ne]AW[mf]AW[kd]AW[ke]AW[mh]AW[ki]AW[ji]AW[jg]AW[hf]AW[he]AW[fe]AW[ed]AW[dc]AW[db]AW[eb]AW[de]AW[df]AB[fb]AB[fc]AB[fd]AB[gd]AB[hd]AB[je]AB[jf]AB[if]AB[kf]AB[ig]AB[lg]AB[gg]AB[ii]AB[cc]AB[cd]AB[cf]AB[cg]AW[eh]AW[ej]AB[pd]AB[pf]AB[qh]AW[oh]AB[qk]C[Push and cut from A, or connect at B ?FORCE]LB[ge:A]TR[fe]LB[ie:B]AP[goproblems]
(;B[ie];W[ff]C[The exchange F15/F14 is unnecessary and a bit damezumari: J15 first is better. White now has 2 ko threats (J16 E17) instead of one.]))
(;B[ie]C[Probably the best (see blyx comment at root). Black fixes his weakness, and now threaten F15.RIGHT];W[ff];B[hj]C[Black can give up G13 and play something like this to escape faster.])
(;B[hg]C[The game continuation, preparing to run toward the lower side. Now black threatens to push at A, so white will defend with F14.NOTTHIS];W[ff];B[ie]C[But since white now threatens to cut, black must defend and we see that the move H13 is suboptimal (just change move order: 1.J15 2.F14 3.H13 = weird).]))