(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[qs][qr][qq][pr][rq][sr][rs][js][is][ir][iq][hq][gq][gp][go][ho]
[jn][kn][ln][in]AW[pq][oq][or][os][ps][qp][rp][sp][ks][jr][jq][hp][ip][io][jo][ko]
[lo][mn][lm][ml][po];B[kr]C[Black can cut, but is White safe or not?];W[ls]
(;B[jp]C[Black can try this.]
(;W[kp]C[If White captures then Black  can escape.];B[kq];W[jp];B[mo];W[lp];B[lq];W[mp];B[mq];W[np];B[ms])
(;W[kq]C[However White can play here and stay safe.];B[lr];W[ms]))
(;B[lr]
;W[ms]C[Forcing here first does not help Black.];B[mr];W[ns];B[jp]
(;W[kp]C[Again White should not take.];B[kq];W[jp];B[mo];W[lp];B[mp])
(;W[kq]C[White is safe.];B[lq];W[kp];B[mo];W[mp];B[no];W[mq]))
(;B[lq]C[This is the tesuji and White cannot stop Black from getting away.];W[mr];B[jp]
;W[kp]C[White has to take as the other choice runs out of liberties.];B[kq]
(;W[mq]C[White had better drop back at this point.];B[jp]C[Black doesn't need to capture just yet but it is sente.])
(;W[jp]
;B[mo]C[White loses big.]))
(;B[kq]C[As a variation this simple atari is one of the oves that works.];W[jp];B[ms]
(;W[lr];B[lq];W[mr];B[mq];W[nr];B[mo];W[mp];B[no];W[nq];B[np])
(;W[mp]C[White should defend the cut.];B[mq]C[Black can capture the two stones in gote at the appropriate stage of the endgame.])))
