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life and death
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Problem | 7811 |
Created | 2005-12-20 |
Name | One-move problem n°91 |
Source | 1001 Life & Death problems by R. Bozulich |
Rating | |
Difficulty | 6.9 kyu |
Average Solve Time | 64 secs |
User Attempts |
1385 / 4355 |
Solve Ratio Rating | 4 kyu |
| rating history |
This is the problem n°91 taken from "1001 Life & Death Problems" by R. Bozulich (Kiseido Publishing Company).
(;SZ[19]AW[co]AW[do]AW[eo]AW[fp]AW[gp]AW[bq]AW[cq]AW[hq]AW[iq]AW[br]AW[dr]AW[ir]AW[is]AB[dp]AB[ep]AB[dq]AB[gq]AB[cr]AB[gr]AB[hr]AB[cs]AB[es]AB[hs]C[There is only one first move for Black to live.]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]PW[Blanc]PB[Noir]
(;B[fq]C[];W[er]
(;B[eq];W[bs]
(;B[ds];W[fs])
(;B[fr];W[ds])
(;B[fs];W[ds])
(;B[gs];W[ds])
(;B[cp];W[ds]))
(;B[fr];W[bs]
(;B[ds];W[fs])
(;B[fs];W[ds])
(;B[gs];W[ds]))
(;B[fs]
(;W[eq]C[CHOICE]
(;B[cp];W[bp])
(;B[fr];W[cp])
(;B[ds];W[cp])
(;B[gs];W[cp])
(;B[bs];W[cp]))
(;W[ds]C[CHOICE]
(;B[bs];W[as])
(;B[gs];W[bs])
(;B[fr];W[bs])
(;B[eq];W[bs])
(;B[cp];W[bs]
(;B[bp];W[eq])
(;B[eq];W[bp])
(;B[fr];W[bp])
(;B[gs];W[bp])
(;B[cs];W[bp])
(;B[cr];W[bp])))))
(;B[eq]
(;W[er]C[CHOICE]
(;B[fr];W[bs]
(;B[ds]C[RIGHT])
(;B[fs];W[ds])
(;B[gs];W[ds])
(;B[fq];W[ds])
(;B[cp];W[ds]))
(;B[ds];W[fr]
(;B[fs];W[fq]
(;B[bs];W[gs])
(;B[gs];W[bs])
(;B[cp];W[bp]))
(;B[fq];W[fs]
(;B[gs];W[er]
(;B[fr]C[RIGHT])
(;B[dr];W[fr])
(;B[fs];W[dn])
(;B[cp];W[bp]
(;B[fr]C[RIGHT])
(;B[dr];W[fr])
(;B[fs];W[dn])
(;B[bs];W[fr])))
(;B[cp];W[bs])
(;B[bs];W[as]))
(;B[gs];W[fq]
(;B[fs];W[bs])
(;B[cp];W[bp])
(;B[bs];W[fs]))
(;B[bs];W[fq]
(;B[cp];W[bp])
(;B[fs];W[gs])
(;B[gs];W[fs])
(;B[as];W[gs]))
(;B[cp];W[fq];B[bp];W[bo]))
(;B[fs];W[fq]
(;B[fr];W[cp])
(;B[cp];W[bp])
(;B[ds];W[cp])
(;B[gs];W[cp])
(;B[bs];W[cp]))
(;B[gs];W[fq]
(;B[cp];W[bp])
(;B[fr];W[cp])
(;B[fs];W[cp])
(;B[ds];W[cp])
(;B[bs];W[cp]))
(;B[fq];W[bs]
(;B[ds];W[fs])
(;B[fr];W[ds])
(;B[fs];W[ds])
(;B[gs];W[ds])
(;B[cp];W[ds]))
(;B[bs];W[fq]
(;B[as];W[cp])
(;B[ds];W[cp])
(;B[fs];W[cp])
(;B[gs];W[cp])
(;B[fr];W[cp])
(;B[cp];W[bp]))
(;B[cp];W[fq]
(;B[bp];W[bo])
(;B[bs];W[bp])
(;B[ds];W[bp])
(;B[fs];W[bp])
(;B[gs];W[bp])
(;B[fr];W[bp]))
(;B[bp];W[fq]
(;B[cp];W[bo])
(;B[bs];W[cp])
(;B[ds];W[cp])
(;B[fs];W[cp])
(;B[gs];W[cp])
(;B[fr];W[cp])
(;B[bo];W[cp])
(;B[aq];W[cp])))
(;W[fq]C[CHOICE]
(;B[er];W[fr]
(;B[cp];W[bp])
(;B[bs];W[gs])
(;B[ds];W[gs])
(;B[fs];W[gs])
(;B[gs];W[fs]))
(;B[fr];W[cp]
(;B[er]C[RIGHT])
(;B[bs];W[er])
(;B[ds];W[er])
(;B[fs];W[er])
(;B[gs];W[er]))
(;B[bs];W[er]
(;B[as];W[cp])
(;B[ds];W[cp])
(;B[fs])
(;B[gs])
(;B[fr];W[cp])
(;B[cp];W[bp]))
(;B[ds];W[fr]
(;B[fs];W[er]
(;B[bs];W[gs])
(;B[gs];W[bs])
(;B[cp];W[bp]))
(;B[er];W[fs]
(;B[cp];W[bp])
(;B[bs];W[gs])
(;B[dr];W[gs]))
(;B[gs];W[fs])
(;B[bs];W[er]
(;B[cp];W[bp])
(;B[fs])
(;B[gs])
(;B[as];W[gs]))
(;B[cp];W[er];B[bp];W[bo]))
(;B[fs];W[fr]
(;B[gs];W[er])
(;B[er];W[gs])
(;B[ds];W[er])
(;B[cp];W[er]
(;B[bp];W[bo])
(;B[ds];W[bp])
(;B[bs];W[bp])
(;B[gs];W[bp]))
(;B[bs];W[er]))
(;B[gs];W[fr]
(;B[er];W[fs])
(;B[fs];W[er])
(;B[ds];W[fs])
(;B[bs];W[er])
(;B[cp];W[er];B[bp];W[bo]))
(;B[cp];W[er]
(;B[bp];W[bo])
(;B[bs])
(;B[ds];W[bp])
(;B[fs];W[bp])
(;B[gs])
(;B[fr];W[bp]))))
(;B[er]C[];W[fq]
(;B[fr];W[eq]
(;B[ds];W[cp])
(;B[bs];W[cp])
(;B[fs];W[cp])
(;B[gs];W[cp])
(;B[cp];W[bp]))
(;B[eq];W[fr]
(;B[cp];W[bp])
(;B[bs];W[gs])
(;B[ds];W[gs])
(;B[fs];W[gs])
(;B[gs];W[fs]))
(;B[gs];W[fr]
(;B[fs];W[cp]
(;B[eq];W[ds])
(;B[ds];W[eq])
(;B[bs];W[eq]))
(;B[eq];W[fs])
(;B[ds];W[fs])
(;B[cp];W[bp]
(;B[eq];W[fs])
(;B[fs];W[eq])
(;B[ds];W[fs]))
(;B[bs];W[fs]))
(;B[fs];W[fr]
(;B[gs];W[cp]
(;B[eq];W[ds])
(;B[ds];W[eq])
(;B[bs];W[eq]))
(;B[ds];W[gs])
(;B[eq];W[gs])
(;B[cp];W[bp]
(;B[eq])
(;B[ds];W[gs])
(;B[gs];W[eq])))
(;B[ds];W[fr]
(;B[fs];W[gs])
(;B[gs];W[fs])
(;B[bs];W[gs])
(;B[dr];W[gs])
(;B[eq];W[fs]
(;B[cp];W[bp])
(;B[bs];W[gs])
(;B[dr];W[gs]))
(;B[cp];W[bp]
(;B[eq])
(;B[dr];W[gs])
(;B[fs];W[gs])
(;B[gs];W[fs])
(;B[bs];W[gs])))
(;B[bs];W[fr])
(;B[cp];W[bp]
(;B[fr];W[eq])
(;B[eq];W[fr])
(;B[gs];W[eq])
(;B[fs];W[eq])
(;B[ds];W[fr]
(;B[eq])
(;B[dr];W[gs])
(;B[fs])
(;B[gs])
(;B[bs];W[gs]))
(;B[bs];W[eq])))
(;B[fr]C[];W[eq]
(;B[cp];W[bp])
(;B[fq];W[cp])
(;B[er];W[cp])
(;B[ds];W[cp])
(;B[fs];W[cp])
(;B[gs];W[cp])
(;B[bs];W[cp]))
(;B[bs]C[];W[eq]
(;B[cp];W[bp])
(;B[fq];W[cp]
(;B[er];W[fs])
(;B[fs];W[er])
(;B[fr];W[dn])
(;B[gs];W[dn])
(;B[ds];W[fr]))
(;B[er];W[cp]
(;B[fq];W[fs])
(;B[fr];W[dn])
(;B[fs];W[fq])
(;B[gs];W[dn])
(;B[ds];W[dq]
(;B[fq];W[fs])
(;B[fs];W[fq])
(;B[fr];W[dn])
(;B[gs];W[dn])))
(;B[fr];W[cp])
(;B[gs];W[cp])
(;B[fs];W[cp]
(;B[fq];W[er])
(;B[er];W[fq])
(;B[fr];W[dn])
(;B[gs];W[dn])
(;B[ds];W[dn]))
(;B[ds];W[cp]
(;B[er];W[dq]
(;B[fq];W[fs])
(;B[fs];W[fq])
(;B[fr];W[dn])
(;B[gs];W[dn]))
(;B[fs];W[dn])
(;B[gs];W[dn])
(;B[fr];W[dn])
(;B[fq];W[fr])))
(;B[ds]C[];W[eq]
(;B[er];W[fq]
(;B[fr];W[cp])
(;B[dr];W[fr])
(;B[cp];W[bp])
(;B[fs];W[cp])
(;B[gs];W[cp])
(;B[bs];W[cp]))
(;B[fr];W[cp])
(;B[fq];W[cp]
(;B[er];W[fs]
(;B[dq];W[ep])
(;B[fr];W[dq])
(;B[gs];W[dq])
(;B[ep];W[dq])
(;B[dp];W[dq]))
(;B[fs];W[er]))
(;B[cp];W[bp]
(;B[er];W[dq]
(;B[fq];W[fs])
(;B[fr];W[dn])
(;B[fs];W[fq]))
(;B[fq];W[er])
(;B[fr];W[dn])
(;B[fs];W[er])
(;B[gs];W[dn]))
(;B[gs];W[cp])
(;B[fs];W[cp]
(;B[er];W[fq])
(;B[fq];W[er])
(;B[fr];W[dn])
(;B[gs];W[dn])))
(;B[fs]C[];W[eq]
(;B[cp];W[bp]
(;B[er];W[fq])
(;B[fq];W[er]))
(;B[fq];W[er]
(;B[cp];W[bp])
(;B[fr];W[cp])
(;B[ds];W[cp])
(;B[gs];W[cp])
(;B[bs];W[cp]))
(;B[er];W[fq]
(;B[ds];W[cp])
(;B[gs];W[cp])
(;B[fr];W[cp])
(;B[cp];W[bp]))
(;B[fr];W[cp])
(;B[ds];W[cp]
(;B[er];W[fq])
(;B[fq])
(;B[fr];W[dn])
(;B[gs];W[dn]))
(;B[gs];W[cp]))
(;B[gs]C[];W[eq]
(;B[cp];W[bp])
(;B[fq];W[cp])
(;B[fr];W[cp])
(;B[er];W[cp])
(;B[fs];W[cp])
(;B[ds];W[cp])
(;B[bs];W[cp]))
(;B[cp]C[];W[bp]
(;B[eq];W[er]
(;B[fr];W[fq])
(;B[fq];W[fr]
(;B[gs];W[fs])
(;B[fs];W[gs])
(;B[ds];W[gs]))
(;B[gs];W[fq])
(;B[fs];W[fq])
(;B[ds];W[fq])
(;B[bs];W[fq]))
(;B[er];W[eq]
(;B[fq];W[fs])
(;B[fs];W[fq])
(;B[fr];W[dn])
(;B[gs];W[dn])
(;B[ds];W[dq]
(;B[fq];W[fs])
(;B[fr];W[dn])
(;B[fs];W[fq])))
(;B[fq];W[eq]
(;B[er];W[fs])
(;B[fs];W[er])
(;B[fr];W[dn])
(;B[ds];W[er])
(;B[gs];W[dn]))
(;B[fr];W[eq])
(;B[fs];W[eq]
(;B[er];W[fq])
(;B[fq];W[er]))
(;B[ds];W[eq]
(;B[er];W[dq]
(;B[fq];W[fs])
(;B[fr];W[dn])
(;B[fs];W[fq]))
(;B[fq];W[er])
(;B[fr];W[dn])
(;B[fs];W[er])
(;B[gs];W[dn]))
(;B[gs];W[eq])))
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