(;
GM[1]FF[4]VW[]AP[Many Faces of Go:11.0]
SZ[19]
HA[0]
ST[1]
DT[2003-03-25]
KM[0.0]
RU[Japanese]
AB[pd][pc][pb][od][lb][kb][kc][kd][ke][kf][lf]
AW[rb][rc][qe][qg][oc][oe][ne][mg][le][lc][ld][mb][mf]
C[Black to save his 4 stones.]
TR[pb][pc][pd][od]
(;B[mc];W[nc]
(;B[ma];W[nb]
(;B[nd];W[md];B[na];W[oa];B[la]
C[RIGHT
White cannot connect at A, because black with B will capture
at either C or D. But black A not only connects his groups,
it also threatens double-atari at C and D. White must spend
a move (lost sente) to protect her four stones or give 8 points to black.]
LB[ob:A][pa:B][mc:C][me:D]
TR[nc][oc][nb][mb]
)
(;B[md];W[nd];B[na];W[oa])
(;B[na];W[nd];B[ob]
C[RIGHT
Black connects. However, there is a better solution that can give black more benefits.]
))
(;B[nb];W[ma];B[md];W[nd];B[me];W[ob]))
(;B[nb];W[ma]
C[Black 1 is a good try. However, ...]
LB[nb:1]
(;B[mc];W[nc];B[md];W[nd];B[me];W[ob])
(;B[nc];W[mc]
C[Black has at most one eye. Black fails.]
))
(;B[ma];W[nb];B[mc];W[nd];B[ob];W[nc];B[na]
C[RIGHT
Black connects. However, there is a better solution that can give black more benefits.
The chinese text mentioned that this is variation is the strongest response white can give against black 1. This is the text (translated) quote, 'Although black connects, but white 2 and 4 have gained benefit.' I am not sure how white 2 and 4 have gained benefit.]
LB[ma:1][nb:2][nd:4]
)
(;B[nc];W[mc]
C[Black can make at most one eye.]
)
(;B[na];W[ma];B[mc];W[nc];B[md];W[nd];B[me];W[nb]))
picketfence