(
;
FF[1]
GM[1]
SZ[19]
AP[Jago:Version 4.53]
GN[yangyilan195]
AB[rb][qb][qd][qe][pe][oe][me][mf][ke][kg][je][jd][jc][jb][ja][nc][nb]
AW[kd][kc][kb][mb][md][nd][od][pd][pc][pb]
(
;
B[ld]
(
;
W[mc]
(
;
B[pa]
;
W[oa]
(
;
B[ka]
;
W[la]
(
;
B[ob]
;
W[qa]
;
B[lc]
;
W[lb]
;
B[na]
C[RIGHT]
)
(
;
B[lc]
;
W[lb]
;
B[ob]
;
W[na]
;
B[ma]
;
W[oa]
(
;
B[qa]
;
W[oc]
;
B[na]
;
W[oa]
(
;
B[na]
;
W[nb]
C[ko! black can do better]
)
(
;
B[nb]
;
W[na]
)
)
(
;
B[na]
;
W[oc]
C[black can't connect]
)
)
)
(
;
B[ob]
;
W[qa]
;
B[ka]
;
W[la]
;
B[lc]
;
W[lb]
;
B[na]
C[RIGHT]
)
)
(
;
B[ka]
;
W[la]
;
B[pa]
;
W[ob]
;
B[oa]
;
W[na]
C[Black can do better than ko; look at the order of moves]
)
)
(
;
W[lc]
;
B[ka]
;
W[la]
;
B[na]
;
W[oa]
;
B[mc]
;
W[le]
;
B[ma]
C[black has connected to the other side!]
)
)
(
;
B[pa]
;
W[oa]
(
;
B[ld]
;
W[lc]
;
B[ka]
;
W[la]
;
B[na]
;
W[ob]
;
B[ma]
;
W[mc]
C[Black can do better than ko; look at the order of moves]
)
(
;
B[qa]
;
W[na]
)
(
;
B[na]
;
W[ob]
(
;
B[ka]
;
W[la]
;
B[ld]
;
W[lc]
(
;
B[ma]
;
W[mc]
C[ko; black can do better]
)
(
;
B[mc]
;
W[le]
)
)
(
;
B[ld]
;
W[lc]
;
B[ka]
;
W[la]
;
B[ma]
;
W[mc]
C[ko; black can do better]
)
)
)
(
;
B[mc]
;
W[ld]
(
;
B[lb]
;
W[ka]
;
B[ma]
;
W[oa]
(
;
B[qc]
;
W[na]
(
;
B[ne]
;
W[lc]
C[white can live in seki. Black can do better]
TR[ob][oc]
)
(
;
B[le]
;
W[lc]
TR[oc][ob]
C[white can live in seki. Black can do better]
)
)
(
;
B[ne]
;
W[na]
(
;
B[qc]
;
W[lc]
C[white can live in seki]
)
(
;
B[le]
;
W[lc]
C[white can live in seki]
TR[oc][ob]
)
)
(
;
B[le]
;
W[na]
(
;
B[ne]
;
W[lc]
C[white can live in seki]
TR[ob][oc]
)
(
;
B[qc]
;
W[lc]
C[white can live in seki]
TR[oc][ob]
)
)
(
;
B[lc]
;
W[na]
(
;
B[qc]
;
W[la]
;
B[mb]
;
W[ob]
;
B[ne]
;
W[oc]
;
B[mb]
;
W[mc]
)
(
;
B[ne]
;
W[la]
;
B[mb]
;
W[ob]
(
;
B[le]
;
W[oc]
;
B[mb]
;
W[mc]
C[two eyes]
)
(
;
B[qc]
;
W[oc]
;
B[mb]
;
W[mc]
C[two eyes]
)
)
(
;
B[le]
;
W[la]
;
B[mb]
;
W[ob]
(
;
B[ne]
;
W[oc]
;
B[mb]
;
W[mc]
C[two eyes]
)
(
;
B[qc]
;
W[oc]
;
B[mb]
;
W[mc]
C[two eyes]
)
)
(
;
B[la]
;
W[ob]
C[black loses the capturing race]
)
)
(
;
B[mb]
;
W[lc]
TR[ob][oc]
C[white can live in seki]
)
(
;
B[na]
;
W[lc]
(
;
B[la]
;
W[ob]
;
B[mb]
C[this is not a dead shape....]
;
W[oc]
;
B[mb]
;
W[nb]
)
(
;
B[qc]
;
W[la]
(
;
B[ne]
;
W[ob]
;
B[le]
;
W[mb]
C[black can do better than this multi-step ko]
)
(
;
B[le]
;
W[ob]
;
B[ne]
;
W[mb]
C[black can do better than this multi-step ko]
)
)
(
;
B[ne]
;
W[la]
(
;
B[le]
;
W[ob]
;
B[qc]
;
W[mb]
C[black can do better than this multi-step ko]
)
(
;
B[qc]
;
W[ob]
;
B[le]
;
W[mb]
C[black can do better than this multi-step ko]
)
)
(
;
B[le]
;
W[la]
(
;
B[ne]
;
W[ob]
;
B[qc]
;
W[mb]
C[black can do better than this multi-step ko]
)
(
;
B[qc]
;
W[ob]
;
B[ne]
;
W[mb]
C[black can do better than this multi-step ko]
)
)
)
)
(
;
B[ma]
;
W[ka]
;
B[lb]
;
W[oa]
;
B[lc]
;
W[na]
;
B[la]
;
W[ob]
C[black's behind in the liberty race]
)
)
(
;
B[ka]
;
W[la]
;
B[ld]
;
W[mc]
;
B[pa]
;
W[ob]
;
B[oa]
;
W[na]
C[ko; black can do better. watch the order of moves]
)
)