I won this game by only 0.5 point through careless playing. This problem shows one of the mistakes I made.
(;AW[na]AW[nb]AW[mb]AW[mc]AW[nc]AW[ob]AW[oc]AW[nd]AW[pe]AW[oe]AW[ne]AB[lb]AB[lc]AW[kb]AW[kc]AW[ld]AB[md]AB[me]AW[kd]AB[mf]AB[nf]AB[pf]AB[of]AW[qd]AW[rd]AW[qf]AW[rf]AW[se]AW[rc]AW[rg]AB[pd]AB[od]AB[pc]AB[pb]AB[pa]AB[oa]AB[qc]AB[rb]AB[qa]AB[sb]AB[sc]AB[pg]AB[qg]AW[kf]AW[le]AW[lf]AW[je]AB[mg]AB[mh]AB[rh]AB[ri]AB[qi]AB[pi]AB[li]C[Best endgame play on the right side?]AP[goproblems]
(;W[sg];B[sh]C[Nice and simple. T13 is honte; white doesn't need any more defending moves.RIGHT])
(;W[sd];B[sg])
(;W[qe];B[sg])
(;W[re];B[sg])
(;W[sf];B[sh])
(;W[la];B[sg])
(;W[ra];B[sa]C[That's a waste of a ko threat.])
(;W[sh];B[sg]C[Often this kind of mutual damage gives the same result in terms of points. But play on ...]
(;W[si];B[sj]C[?])
(;W[qe];B[si])
(;W[la];B[si])
(;W[sf];B[qe]
(;W[la];B[si]
(;W[sg];B[sd];W[re];B[qe]C[The lesson is this: both T13 and T12 would normally produce the same score, so take the direct, honest move -- the one that creates an eye.])
(;W[re];B[sg]C[The lesson is this: both T13 and T12 would normally produce the same score, so take the direct, honest move -- the one that creates an eye.]))
(;W[re];B[si]
(;W[la];B[sg]C[The lesson is this: both T13 and T12 would normally produce the same score, so take the direct, honest move -- the one that creates an eye.])
(;W[sg];B[sd]
(;W[la];B[qe]C[The lesson is this: both T13 and T12 would normally produce the same score, so take the direct, honest move -- the one that creates an eye.])
(;W[qe];B[ma]C[:O The lesson is this: both T13 and T12 would normally produce the same score, so take the direct, honest move -- the one that creates an eye.]))
(;W[qe];B[sg]C[The lesson is this: both T13 and T12 would normally produce the same score, so take the direct, honest move -- the one that creates an eye.])))))