(;AB[sq]AB[rp]AB[qp]AB[qq]AB[ro]AB[po]AB[pn]AB[pm]AB[pl]AB[ql]AB[rl]AW[qo]AW[qn]AW[qm]AW[rm]AW[sm]AW[so]AW[rq]AW[rr]AW[qr]AW[pq]AW[pp]AW[oo]AW[np]C[Black to win the semeai.]AP[goproblems]
(;B[sl]C[];W[sr]C[]
(;B[rn];W[sp];B[sn]C[T6 is better than S6 in terms of endgame.RIGHT])
(;B[sn]C[Black's best response to T2 in terms of endgame.RIGHT]))
(;B[sp];W[rn]
(;B[sr];W[ss])
(;B[sl];W[sr])
(;B[sn]C[Black can win without ko.]))
(;B[sn];W[rn])
(;B[rn];W[sn])
(;B[sr];W[rn]))