(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
GN[177ax]PB[Black to capture]AW[kq][lq][mq][oq][pq][qq][rq][kr][nr][rr][ms]AB[jp][kp][lp][mp][np][jq][nq][jr][or][pr][qr][ks]
(;B[mr]C[Often the throw-in is the correct move.]
;W[lr]
;B[js]
;W[ls]
;B[os]
;W[qs]C[However it gives White an eye that beats no eye in the capturing race.])
(;B[os]C[Sometimes approaching from this side works.]
(;W[mr]C[If White connects the race is lost.]
;B[ls]
;W[qs]
;B[js])
(;W[ls]
;B[mr]
;W[lr]
;B[ns]
;W[js]
;B[mr]C[This ends as a ko, which is not best for Black.]))
(;B[ls]C[This is the vital point that wins the race.]
(;W[mr]
;B[js]
;W[qs]
;B[lr]C[White cannot escape.])
(;W[os]C[This also fails for White.]
;B[mr]
;W[qs]
;B[ns])))
