(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
C[Just play through the moves to move 22 which is the problem position. These do not represent a game sequence!]
;B[sq]
;W[rq]
;B[qq]
;W[rr]
;B[rp]
;W[qr]
;B[qp]
;W[pq]
;B[ro]
;W[pp]
;B[po]
;W[qo]
;B[pn]
;W[qn]
;B[pm]
;W[qm]
;B[pl]
;W[rm]
;B[ql]
;W[sm]
;B[rl]
;W[so]C[This is the problem position. Black to play and capture some white stones and rescue his.]
(;B[sp]
;W[rn]C[Fails - black is in atari.])
(;B[sn]
;W[rn]C[Fails - black is in Atari.])
(;B[rn]
;W[sn]C[Fails black is in atari])
(;B[sl]C[CORRECT: The only move that works - it would be the best move even if it didn't capture as it seels white in.]
(;W[sn]
;B[sp]C[White is in atari now.])
(;W[sr]
;B[sn]C[White is caught in a snap-back.])
(;W[rn]C[Self atari!])
(;W[sp]
;B[sn]C[White is in atari.])))
