Although I do not make and solve problems during summer holiday, this one will be an exception :-) Have a nice summer!
(;AW[bb]AW[cc]AW[db]AB[da]AB[bc]AB[bd]AB[cd]AW[dd]AW[ec]AB[eb]AB[fb]AW[fc]AW[hd]AW[id]AW[fe]AW[ge]AB[de]AB[ee]AW[ed]AB[cf]AB[eg]AW[kb]AB[gc]AW[fd]AW[hf]AB[gd]AB[fa]AB[jb]AW[kc]AW[ka]AB[gb]AW[jd]AW[ke]AB[jc]AW[ha]AB[ja]AB[lb]AB[la]AW[kd]AB[lc]AB[ld]C[Black is in trouble here, isn't she?]AB[ic]AB[hc]AW[hb]AP[goproblems]
(;B[ba]
(;W[ab];B[cb]C[Oh right, ko!CHOICERIGHT])
(;W[cb];B[ab]C[And black saves her stones and makes a lot of points!RIGHT]))
(;B[ca];W[ba]C[Dead :-(])
(;B[ab];W[ba]C[Dead :_(]))