(;AB[pr][qr][qq][qp][rp][ro][sr]AW[or][nq][pq][qo][qn][rn][pp][ps]LB[sr:A] C[Instead of 'S2', black has responded to the hane at 'Q1', with 'A'. Exact the cost of this mistake.] (;W[sn];B[qs]C[RIGHT White can play 'T6' in sente if he wants. This move is not sente if black had replied to white 'Q1' correctly (at 'S2'), and it may give white options in the upper right side if black has some stones there.]) (;W[rs];B[qs] (;W[rr];B[so]C[Black lives, while white has lost 2 stones needlessly, and left other aji.]) (;W[so];B[rr]C[Black lives, while white has lost 1 or 2 needlessly.])) (;W[so];B[qs]C['T5' is sente but after 'R1' it doesn't really gain white anything.]))