(;AB[cb]AB[eb]AB[ed]AB[dd]AB[ce]AB[df]AB[cg]AB[eg]AB[fg]AB[gg]AB[gf]AB[hf]AB[ge]AB[gd]AB[gc]AB[hc]AB[hb]AB[ia]AB[jb]AB[kb]AB[jf]AB[kg]AB[kh]AB[me]AW[gb]AW[fb]AW[fc]AW[fd]AW[fe]AW[ee]AW[de]AW[ef]AW[ff]AW[dg]AW[dh]AW[eh]AW[fh]AW[hg]AW[gh]AW[hh]AW[jh]AW[ig]AW[if]AW[ie]AW[hd]AW[ic]AW[ib]AW[jd]AW[lb]AW[mc]TR[ee]TR[fd]TR[ff]TR[fb]C[Please capture the marked stones.]AP[goproblems]
(;B[cf]
(;W[ja]C[CHOICE]
(;B[ka];W[ha];B[ga];W[he];B[ha];W[fa];B[ja];W[la]
(;B[ea];W[kc];B[ec]C[Well done.RIGHT])
(;B[ec];W[kc];B[ea]C[Well done.RIGHT])
(;B[kc];W[kd]
(;B[ec];W[lc];B[ea]C[Well done.RIGHT])
(;B[ea];W[lc];B[ec]C[Well done.RIGHT])))
(;B[ha];W[ga];B[ka];W[he];B[ja];W[la]
(;B[ec];W[kc];B[fa]C[Well done.RIGHT])
(;B[fa];W[ea];B[ec];W[kc];B[fa]C[Well done.RIGHT])
(;B[kc];W[kd]
(;B[ec];W[lc];B[fa]C[Well done.RIGHT])
(;B[fa];W[ea];B[ec];W[lc];B[fa]C[Well done.RIGHT])))
(;B[ga];W[ha]TR[he]C[Black dies, white lives.])
(;B[fa];W[ha]TR[he]C[Black dies, white lives.])
(;B[ec];W[ha]TR[he]C[Black dies, white lives.]))
(;W[ga]C[CHOICE]
(;B[ha]
(;W[ja];B[ka];W[he];B[ja];W[la]
(;B[kc]C[];W[kd]
(;B[ec];W[lc];B[fa]C[Well done.RIGHT])
(;B[fa];W[ea];B[ec];W[lc];B[fa]C[Well done.RIGHT]))
(;B[ec];W[kc];B[fa]C[Well done.RIGHT])
(;B[fa];W[ea];B[ec];W[kc];B[fa]C[Well done.RIGHT]))
(;W[he]
(;B[ja];W[kc]
(;B[ec];W[jc];B[fa]C[Well done.RIGHT])
(;B[fa];W[ea];B[ec];W[jc];B[fa]C[Well done.RIGHT]))
(;B[fa];W[ja])))
(;B[ec]
(;W[he]TR[ha]TR[ja]C[Black dies, white lives.])
(;W[ha]))
(;B[fa];W[he]
(;B[ha];W[ja])
(;B[ec];W[ha])))
(;W[ha]C[CHOICE]
(;B[ga];W[fa];B[ha];W[he];B[ja];W[kc]
(;B[ec];W[jc];B[ea]C[Well done.RIGHT])
(;B[ea];W[jc];B[ec]C[Well done.RIGHT]))
(;B[fa];W[he])
(;B[ec];W[he])))
(;B[ec];W[cf]TR[df]C[White can live.])
(;B[fa];W[cf]TR[df]C[White can live.])
(;B[ga];W[cf]TR[df]C[White can live.])
(;B[kc];W[cf]TR[df]C[White can live.]))