(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
AW[lb][kc][lc][mc][nc][oc][ld][rd][me][re][mf][of][pf][qf]AB[pb][rb][rc][kd][md][nd][od][pd][qd][le][pg]C[White plays

Source:
    Qi Jing Zhong Miao #258, an ancient collection of mostly kyu level life and death problems.

Analysis:
    Myron Souris]
(;W[pc]C[Bad timing!  How could such an obvious sente move be such a bad move?!]
;B[sc]C[Black gives up 5 stones, but lives in the corner!]
;W[qc]
;B[qb]
;W[sa]
(;B[ra]C[Correct]
;W[pa]
;B[ob]
;W[oa]
;B[nb]LB[oa:9][pa:7][ra:6][sa:5][nb:10][ob:8][qb:4][pc:1][qc:3][sc:2])
(;B[ob]C[A huge mistake.  Black returns the favor.]
;W[ra]C[Black cannot avoid a bent 4 in the corner.]
;B[nb]
;W[na]
;B[oa]
;W[qa]))
(;W[sc]C[White takes the vital point.]
;B[sb]
;W[pc]
(;B[qc]C[Black has to accept the ko.]
;W[pa]
;B[ob]
;W[ra]
(;B[qa]C[White takes the ko 1st.])
(;B[nb]C[If Black tries to expand his eye space, ...]
;W[qa]
;B[ma]
;W[mb]
;B[na]
;W[qb]C[... Black dies!]))
(;B[ob]C[Fails]
;W[qc]
;B[qb]
;W[ra]
;B[nb]
;W[na])
(;B[ra]C[Fails]
;W[qb]LB[pa:A]C[Or A.]
;B[qc]
;W[pa])))
