(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]AW[qp][rp][pq][rq][sq][nr][pr][rr][sr][ns][os]AB[oo][qo][ro][so][pp][sp][mq][nq][oq][qq][mr][or][rs]C[What is black's best move here?]
(;B[qs]C[If Black plays here to try and kill white]
;W[qr]
;B[ps]
;W[ss]
;B[ps]
;W[qs]C[White easily makes two eyes.])
(;B[ms]C[If black starts from the outside]
;W[ps]C[White is safe to connect]
(;B[qs]
;W[qr])
(;B[qr]
;W[qs]C[This is not a snapback shape.]))
(;B[ps]C[Therefore white should start with the throw-in.]
(;W[qs]
;B[ms]C[Now when Black plays the outside....]
(;W[ps]
;B[qr]C[... White gets captured after the connection.])
(;W[qr]C[So white should solidify the corner shape to make two eyes]
;B[ps]
;W[os]C[And Black makes a small gain on the edge.]
;B[ns]
;W[ps]C[Later these two moves would complete the position.]))
(;W[qr]C[If White plays this way...]
;B[ms]
;W[qs]
;B[os]C[...then White still lives but Black gets more points on the edge if this connection is played immediately..])))
