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life and death
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+3
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| Problem | 1157 |
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| Created | 2001-11-08 |
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| Source | |
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| Rating | |
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| Difficulty | 1.9 dan |
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| Average Solve Time | 69 secs |
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| User Attempts |
510 / 3149 |
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| Solve Ratio Rating | 1 dan |
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| rating history |
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My first attempt at a problem with the CHOICE option. :-)
(
;
FF[4]
GM[1]
SZ[19]
AP[Jago:Version 4.21]
AB[ps][qs][qr][or][oq][pq][nq][mp][mo][qp]
AW[rs][rr][rq][qq][qo][mq][lq][lr][kq][lp][ko][ln][pn][om][mm][nm][rp][ns][qm][rn]
TR[ns]
C[Black first.]
GN[goproblem_x01]
(
;
B[ms]
;
W[mr]
(
;
B[oo]
;
W[no]
(
;
B[nn]
(
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W[on]
(
;
B[pp]
;
W[mn]
(
;
B[np]
;
W[po]
;
B[nn]
C[RIGHT
CHOICE
Ko is the correct answer.]
)
(
;
B[po]
;
W[np]
)
)
(
;
B[np]
;
W[pp]
(
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B[op]
;
W[mn]
)
(
;
B[mn]
;
W[op]
)
(
;
B[po]
;
W[mn]
)
)
(
;
B[mn]
;
W[op]
;
B[np]
;
W[pp]
)
(
;
B[po]
;
W[mn]
)
(
;
B[op]
;
W[mn]
)
)
(
;
W[mn]
(
;
B[pp]
;
W[on]
(
;
B[np]
;
W[po]
;
B[nn]
C[RIGHT
CHOICE
Ko is the correct answer.]
)
(
;
B[po]
;
W[np]
)
)
(
;
B[np]
;
W[pp]
(
;
B[op]
;
W[on]
)
(
;
B[po]
;
W[on]
)
(
;
B[on]
;
W[op]
)
)
(
;
B[on]
;
W[op]
;
B[np]
;
W[pp]
)
(
;
B[po]
;
W[on]
)
(
;
B[op]
;
W[on]
)
)
)
(
;
B[np]
;
W[nn]
)
(
;
B[pp]
;
W[nn]
(
;
B[np]
;
W[po]
)
(
;
B[po]
;
W[np]
)
)
(
;
B[po]
;
W[nn]
)
(
;
B[op]
;
W[nn]
)
(
;
B[mn]
;
W[nn]
)
(
;
B[on]
;
W[nn]
)
)
(
;
B[no]
;
W[oo]
)
(
;
B[op]
;
W[oo]
)
(
;
B[nn]
;
W[oo]
)
(
;
B[pp]
;
W[oo]
)
(
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B[nr]
;
W[oo]
)
)
(
;
B[oo]
;
W[os]
LB[pr:A]
C[A becomes a false eye.]
)
(
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B[os]
;
W[oo]
)
(
;
B[nr]
;
W[oo]
)
(
;
B[mr]
;
W[ms]
(
;
B[oo]
;
W[os]
)
(
;
B[os]
;
W[oo]
)
(
;
B[nr]
;
W[oo]
)
)
)
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