invalid problem set
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life and death
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Problem | 8511 |
Created | 2006-05-05 |
Name | k30 |
Source | dashnet |
Rating | |
Difficulty | 8 dan |
Average Solve Time | 43 secs |
User Attempts |
95 / 1388 |
Solve Ratio Rating | 5 dan |
| rating history |
(;AB[br]AB[cr]AB[dr]AB[fr]AB[fq]AB[gq]AB[hq]AB[iq]AB[jq]AB[lq]AB[kr]AB[ep]AB[eo]AB[co]AB[bo]AB[bm]C[Black to kill]AW[bq]AW[cq]AW[dq]AW[eq]AW[er]AW[fs]AW[gr]AW[hr]AW[ir]AW[jr]AP[goproblems]
(;B[bs]
(;W[ar]C[CHOICE]
(;B[es]
(;W[ds]C[CHOICE]
(;B[js]C[];W[es]
(;B[cs]C[RIGHT])
(;B[is];W[cs]))
(;B[gs]C[];W[es]
(;B[cs]C[RIGHT])
(;B[js];W[cs])
(;B[ap];W[cs];B[aq];W[as];B[br];W[cr]))
(;B[cs];W[as]
(;B[cr];W[gs])
(;B[gs];W[cr])
(;B[js];W[cr])))
(;W[gs];B[js]
(;W[ds];B[is]C[];W[es];B[cs]C[RIGHT])
(;W[cs];B[is];W[ds];B[es]C[RIGHT])))
(;B[js];W[es]C[seki, at most])
(;B[gs];W[es]C[If black moves 'a' - seki, otherwise white moves 'a' and lives.]LB[cs:a])
(;B[ds];W[es])
(;B[ap]C[];W[aq]
(;B[es];W[gs]
(;B[js];W[as]
(;B[is];W[ds])
(;B[cs];W[ds]))
(;B[cs];W[as])
(;B[ds];W[as]))
(;B[ds];W[es])
(;B[cs];W[es]C[seki])
(;B[gs];W[es]C[seki at most]))
(;B[cs];W[es]C[seki])
(;B[is];W[js])
(;B[hs];W[gs]))
(;W[ds];B[js];W[es];B[cs]C[RIGHT]))
(;B[js];W[bs]
(;B[ar];W[aq])
(;B[cs];W[ar];B[as];W[aq]
(;B[es];W[ds]C[double ko])
(;B[gs];W[es])))
(;B[aq]C[];W[ap]
(;B[ar];W[bp]
(;B[ds];W[bs];B[es];W[gs])
(;B[bs];W[ds])
(;B[cs];W[es]))
(;B[bs];W[ar]
(;B[es];W[ds]
(;B[gs];W[hs];B[js];W[bp])
(;B[js];W[gs];B[is];W[bp])
(;B[bp];W[gs]))
(;B[ds];W[es])
(;B[bp];W[gs])
(;B[gs];W[es];B[bp];W[cs])))
(;B[ar];W[aq]
(;B[ds];W[bs])
(;B[es];W[ds])
(;B[gs];W[es])
(;B[bs];W[ds]))
(;B[ds]
(;W[ar]
(;B[es];W[gs]
(;B[bs];W[aq])
(;B[js];W[bs]))
(;B[gs];W[es];B[bs];W[aq])
(;B[bs])
(;B[cs];W[es]))
(;W[bs]
(;B[es];W[gs]
(;B[ar];W[aq])
(;B[js];W[ar]))
(;B[ar];W[aq]
(;B[es];W[gs];B[js];W[cs])
(;B[gs];W[es]))
(;B[aq];W[ap];B[ar];W[bp])))
(;B[cs];W[es])
(;B[gs]C[];W[es]
(;B[bs];W[ar]C[]
(;B[cs]C[seki])
(;B[js];W[cs])
(;B[ds]))
(;B[aq];W[ap]C[w's got enough liberties to kill b, - see other variations];B[ar];W[bp];B[bs];W[ds])
(;B[js];W[bs]
(;B[cs];W[ar];B[as];W[aq])
(;B[ar];W[aq]))
(;B[hs];W[bs]
(;B[cs];W[ar];B[as];W[aq])
(;B[ar];W[aq])
(;B[aq];W[ap];B[ar];W[bp]))
(;B[ar];W[aq])
(;B[cs];W[bs]))
(;B[es]
(;W[gs]
(;B[js];W[ds]
(;B[is];W[bs])
(;B[bs];W[is])
(;B[cs];W[bs]
(;B[as];W[aq];B[es];W[ar]C[double ko])
(;B[es];W[ar]C[double ko];B[as];W[aq])))
(;B[ds];W[bs])
(;B[aq];W[ap];B[ar];W[bp]
(;B[ds];W[bs])
(;B[bs];W[ds])
(;B[cs]C[];W[ds]C[3-step ko]))
(;B[ar];W[aq];B[cs];W[ds]))
(;W[ds]
(;B[bs];W[gs];B[aq];W[ap];B[ar];W[bp])
(;B[gs];W[hs]
(;B[cs];W[es]
(;B[js];W[bs])
(;B[bs];W[js]))
(;B[bs];W[js])
(;B[ar];W[aq])
(;B[js];W[bs])))))
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