(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play and rescue five stones]AW[oo][po][op][qp][rp][sp][mq][oq][qq][nr][rr]AB[qm][qo][ro][so][pp][pq][or][pr][qr]
;B[sr]C[The clamp is the move that catches white short of liberties.]
(;W[sq]C[This is self-atari.]
;B[rq])
(;W[ss]C[This is self-atari]
;B[rs])
(;W[rs]C[This leaves the snapback shape.]
(;B[rq]
;W[sq]
;B[rq])
(;B[sq]C[Black can also play this way (but it leaves more ko threats)]
;W[rq]
;B[qs]
;W[ss]
(;B[sq])
(;B[sr])))
(;W[rq]
;B[rs]C[This is just out of liberties.])
(;W[qs]C[Trying to capture the five stones is too slow.]
(;B[rq]C[Black still gets the snapback.]
;W[sq]
;B[rq])
(;B[sq]C[Or black can atari.]
;W[rq]
;B[rs])))
