invalid problem set
Problem | 21315 |
Created | 2016-08-29 |
Source | |
Rating | |
Difficulty | 8 dan |
Average Solve Time | 82 secs |
User Attempts |
22 / 174 |
Solve Ratio Rating | 2 dan |
| rating history |
Appeared in one of my games.
(;AW[ch]AW[ci]AW[bl]AW[cm]AW[dm]AW[dn]AW[fn]AW[do]AW[ep]AW[eq]AW[gq]AW[jq]AW[fr]AW[fs]AB[bk]AB[cl]AB[dl]AB[el]AB[bm]AB[cn]AB[co]AB[dp]AB[dq]AB[cr]AB[er]AB[es]LB[bk:4]LB[bl:3]LB[bm:2]LB[cm:1]C[Black decided to take the cutting stone. Gain something in the corner.]
(;W[bn];B[al]
(;W[cp];B[bo]
(;W[bp]
(;B[an]C[CHOICE]
(;W[cq];B[dr]
(;W[br]
(;B[bq]C[CHOICE]
(;W[aq]
(;B[ap]C[CHOICE]
(;W[ao]C[Good ko. (White took first and has a local threat at B3.)RIGHT])
(;W[cs];B[bq])
(;W[ds];B[bq])
(;W[bs];B[bq])
(;W[as];B[bq])
(;W[ar];B[bq]))
(;B[bs];W[cs];B[ds];W[cs]C[RIGHT]))
(;W[ap]
(;B[bs]C[CHOICE]
(;W[ar];B[ao];W[aq];B[cs]C[Seki.RIGHT])
(;W[aq];B[cs]
(;W[ar];B[ao]C[Seki.RIGHT])
(;W[as];B[ar]C[Good ko.RIGHT]))
(;W[cs];B[ar])
(;W[ds];B[ar])
(;W[as];B[ar]))
(;B[ar]
(;W[bs];B[ao];W[aq];B[bq])
(;W[aq];B[bs];W[as]C[Good ko.RIGHT])))
(;W[cs];B[ap])
(;W[ds];B[ap])
(;W[bs];B[ap])
(;W[ar];B[ap])
(;W[ao];B[ap]))
(;B[ap];W[bq]
(;B[cs];W[bs]C[RIGHT])
(;B[aq];W[cs]C[RIGHT])
(;B[bs];W[cs];B[ds];W[cs]C[RIGHT]))
(;B[cs];W[bs]C[RIGHT])
(;B[bs];W[cs];B[ds];W[cs]C[RIGHT]))
(;W[ao];B[ap];W[bq];B[br])
(;W[ap];B[br]C[Black wins the race.])
(;W[bq];B[br])
(;W[ar];B[ap];W[bq];B[br])
(;W[aq];B[br];W[ao];B[bn]))
(;W[dr]
(;B[ds];W[cq];B[dr];W[br]C[RIGHT])
(;B[cq]C[CHOICE]
(;W[ds];B[bq]C[You could have gained more.])
(;W[cs];B[bs];W[ds];B[br]C[You could have gained more.])
(;W[br]
(;B[bq]C[CHOICE];W[cs];B[ap]
(;W[ds]C[RIGHT])
(;W[bs]C[RIGHT]))
(;B[ds]
(;W[bq]
(;B[ap];W[bs]C[RIGHT])
(;B[cs];W[bs]C[RIGHT])
(;B[bs]C[CHOICE]
(;W[as];B[ar])
(;W[ar];B[ap]C[White can't approach.])
(;W[aq];B[as]C[White can't approach.];W[ao];B[bn])
(;W[ap];B[ar]C[White can't approach.])))
(;W[ap];B[bq]
(;W[aq];B[ao]
(;W[ar];B[bs])
(;W[cs];B[bs]))
(;W[cs];B[bs]
(;W[ar];B[aq])
(;W[aq];B[ar])))
(;W[bs];B[bq];W[cs];B[aq];W[dr]C[RIGHT]))))))
(;B[ao];W[cq];B[dr];W[br]
(;B[bq];W[aq]
(;B[cs];W[bs]C[RIGHT])
(;B[bs];W[cs]C[RIGHT]))
(;B[ap];W[bq];B[bs];W[cs]C[RIGHT])
(;B[bs];W[cs]C[RIGHT])))
(;W[cq];B[dr]
(;W[br];B[bq])
(;W[bp];B[an]
(;W[br];B[bq];W[aq];B[ap];W[ao]C[Good ko. (White took first and has a local threat at B3.)RIGHT])
(;B[dr]
(;W[br]
(;B[bq]C[CHOICE]
(;W[aq]
(;B[ap]C[CHOICE]
(;W[ao]C[Good ko. (White took first and has a local threat at B3.)RIGHT])
(;W[cs];B[bq])
(;W[ds];B[bq])
(;W[bs];B[bq])
(;W[as];B[bq])
(;W[ar];B[bq]))
(;B[bs];W[cs];B[ds];W[cs]C[RIGHT]))
(;W[ap]
(;B[bs]C[CHOICE]
(;W[ar];B[ao];W[aq];B[cs]C[Seki.RIGHT])
(;W[aq];B[cs]
(;W[ar];B[ao]C[Seki.RIGHT])
(;W[as];B[ar]C[Good ko.RIGHT]))
(;W[cs];B[ar])
(;W[ds];B[ar])
(;W[as];B[ar]))
(;B[ar]
(;W[bs];B[ao];W[aq];B[bq])
(;W[aq];B[bs];W[as]C[Good ko.RIGHT])))
(;W[cs];B[ap])
(;W[ds];B[ap])
(;W[bs];B[ap])
(;W[ar];B[ap])
(;W[ao];B[ap]))
(;B[ap];W[bq]
(;B[cs];W[bs]C[RIGHT])
(;B[aq];W[cs]C[RIGHT])
(;B[bs];W[cs];B[ds];W[cs]C[RIGHT]))
(;B[cs];W[bs]C[RIGHT])
(;B[bs];W[cs];B[ds];W[cs]C[RIGHT]))
(;W[ao];B[ap];W[bq];B[br])
(;W[ap];B[br]C[Black wins the race.])
(;W[bq];B[br])
(;W[ar];B[ap];W[bq];B[br])
(;W[aq];B[br];W[ao];B[bn]))))
(;W[dr];B[cq]
(;W[bp];B[an]
(;W[br]
(;B[bq]C[CHOICE];W[cs];B[ap]
(;W[ds]C[RIGHT])
(;W[bs]C[RIGHT]))
(;B[ds]
(;W[bq]
(;B[ap];W[bs]C[RIGHT])
(;B[cs];W[bs]C[RIGHT])
(;B[bs]C[CHOICE]
(;W[as];B[ar])
(;W[ar];B[ap]C[White can't approach.])
(;W[aq];B[as]C[White can't approach.];W[ao];B[bn])
(;W[ap];B[ar]C[White can't approach.])))
(;W[ap];B[bq]
(;W[aq];B[ao]
(;W[ar];B[bs])
(;W[cs];B[bs]))
(;W[cs];B[bs]
(;W[ar];B[aq])
(;W[aq];B[ar])))
(;W[bs];B[bq];W[cs];B[aq];W[dr]C[RIGHT])))
(;W[ds];B[bq]C[You could have gained more.])
(;W[cs];B[bs];W[ds];B[br]C[You could have gained more.]))
(;W[ds];B[bp]C[You could have gained more.])
(;W[cs];B[bs];W[ds];B[br]C[You could have gained more.])
(;W[br];B[ds];W[bp];B[an];W[bq];B[bs]
(;W[ap];B[ar])
(;W[ao];B[ap])
(;W[aq];B[as];W[ao];B[bn])
(;W[ar];B[ap])
(;W[as];B[ar]))))
(;W[bo];B[cp];W[bp];B[bq])
(;W[bp];B[cp]
(;W[bq];B[bo])
(;W[bo];B[bq]))
(;W[dr];B[cp];W[cs];B[bs];W[ds];B[br]C[You could have gained more.]))
(;W[cp];B[bo]
(;W[cq];B[dr];W[br];B[bq])
(;W[bp];B[ao]
(;W[cq];B[dr];W[br];B[bq];W[aq];B[ap];W[bq];B[bs])
(;W[an];B[ap])))
(;W[dr]
(;B[cp];W[cs];B[bs];W[ds];B[br]C[You could have gained more.])
(;B[ds]
(;W[cp];B[bn];W[cq];B[dr];W[br]C[RIGHT])
(;W[bn];B[al];W[cp];B[bo];W[bp];B[an];W[cq]C[RIGHT]))))
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