(;GM[1]FF[3]
RU[Japanese]SZ[19]HA[0]KM[5.5]
PW[White]
PB[Black]
GN[White (W) vs. Black (B)]
DT[1996-04-22]
SY[Cgoban 1.4.2]TM[-]
C[Life and death problem from Evan Behre <evanb@clark.net>

Posted on rec.games.go the 18th Apr 1996
]
;AW[bo][cp][cq][eq][fq][br][dr][er]
AB[bn][co][do][bp][ep][fp][bq][gq][fr][gr]
C[intermediate level life and death problem: b to play and kill w
]
(;B[cs]C[b plays the vital point
];W[bs]C[w blocks
];B[cr]
C[b plays up
];W[ds]C[w captures
];B[cr]C[b throws in
];W[cs]
C[w captures
];B[dp]LB[ar:A][dq:B]
C[b prevents w from making an eye

a2 and d3 are miai. since b needs both to live, b dies.
])

(;B[dp]C[failure

b hastily plays
];W[aq]C[w plays 2 in sente
];B[ao]
C[b must capture
];W[cs]C[w lives
]
(;B[dq]C[note that if b plays d3, ..
];W[es]
C[w must not connect at c2, rather w should make an eye with e1.
];
B[cr]C[if b captures 2 stones with c2 after d3 ..
];W[cq]
C[then w can recapture 1 stone at c3, thereby retaining the integrity of the eye at d1.
])

(;B[es]C[if b e1, then w d3.
];W[dq])
)

)