invalid problem set
Problem | 2912 |
Created | 2003-09-05 |
Name | build a tunnel |
Source | |
Rating | |
Difficulty | 7 kyu |
Average Solve Time | 55 secs |
User Attempts |
1440 / 5682 |
Solve Ratio Rating | 3 kyu |
| rating history |
The four black stones seems to be surrounded.
However, white has bad aji. Black to find a
way to connect.
(;AW[ao]AW[bp]AW[cp]AW[bn]AW[dq]AW[eq]AW[gp]AW[dm]AW[fm]AW[el]AB[bo]AB[co]AB[do]AB[dp]AB[dl]AB[cl]AB[cj]C[This is a classic problem. Black needsto find a way to connect his stones utilizing white's bad aji.]SZ[19]
(;B[cm];W[cn];B[dn];W[em]
(;B[bm];W[an];B[cq];W[bq]
(;B[ap];W[aq];B[am];W[ap];B[cr];W[br]
(;B[bs]C[RIGHT])
(;B[dr];W[bs])
(;B[cs]C[RIGHT]))
(;B[cr];W[br];B[ap];W[aq];B[am];W[ap]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT])))
(;B[cq];W[bq]
(;B[an];W[am]
(;B[bm];W[an];B[ap];W[aq];B[al];W[ap];B[cr]C[RIGHT]
(;B[bm];W[an];B[ap];W[aq];B[am];W[ap];B[cr];W[br]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT]))
(;B[ap];W[aq]
(;B[bm];W[an];B[am];W[ap];B[cr];W[br]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT]))
(;B[cr];W[br];B[bm];W[an];B[am];W[ap]
(;B[cs]C[RIGHT])
(;B[bs]C[RIGHT]))))
(;B[cr];W[br];B[bm];W[an];B[ap];W[aq];B[al]C[RIGHT]))
(;B[bm];W[an];B[ap];W[aq];B[am];W[ap];B[cr]C[RIGHT];W[br]
(;B[bs]C[RIGHT])
(;B[dr];W[bs])
(;B[cs]C[RIGHT]))
(;B[cr];W[br]
(;B[bm];W[an];B[ap];W[aq];B[am]C[RIGHT];W[ap]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT]))
(;B[ap];W[aq];B[bm];W[an];B[am]C[RIGHT];W[ap]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT]))
(;B[an];W[am];B[bm];W[an];B[ap];W[aq];B[al]C[RIGHT])
(;B[am];W[an];B[ap];W[aq];B[bm]C[RIGHT];W[ap]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT])))
(;B[ap];W[aq]
(;B[an];W[am];B[bm];W[an];B[al];W[ap];B[cr]C[RIGHT]
(;B[bm];W[an];B[am];W[ap];B[cr]C[RIGHT];W[an];B[am];W[ap];B[cr]C[RIGHT])
(;B[cr];W[br];B[bm];W[an];B[am]C[RIGHT];W[ap]
(;B[cs]C[RIGHT])
(;B[bs]C[RIGHT])))
(;B[am];W[an];B[bm];W[ap];B[cr]C[RIGHT];W[br]
(;B[bs]C[RIGHT])
(;B[dr];W[bs])
(;B[cs]C[RIGHT]))
(;B[bm];W[an];B[am];W[ap];B[cr]C[RIGHT];W[br]
(;B[bs]C[RIGHT])
(;B[dr];W[bs])
(;B[cs]C[RIGHT]))
(;B[cr]C[RIGHT]))
(;B[am];W[an];B[ap];W[aq];B[bm];W[ap];B[cr]C[RIGHT];W[br]
(;B[bs]C[RIGHT])
(;B[dr];W[bs])
(;B[cs]C[RIGHT])))
(;B[ap];W[aq];B[bm];W[an]
(;B[cq];W[cr];B[am];W[ap])
(;B[am];W[ap];B[cq];W[cr]))
(;B[an];W[am]
(;B[cq];W[bq];B[bm];W[an];B[ap];W[aq];B[al];W[ap];B[cr];W[br]
(;B[cs]C[RIGHT])
(;B[bs]C[RIGHT]))
(;B[bm];W[an];B[cq];W[bq];B[ap];W[aq];B[al];W[ap];B[cr];W[br]
(;B[cs]C[RIGHT])
(;B[bs]C[RIGHT])))
(;B[am];W[an];B[cq];W[bq]
(;B[ap];W[aq];B[bm];W[ap];B[cr]C[RIGHT];W[br]
(;B[bs]C[RIGHT])
(;B[dr];W[bs])
(;B[cs]C[RIGHT]))
(;B[cr];W[br];B[ap];W[aq];B[bm]C[RIGHT];W[ap]
(;B[bs]C[RIGHT])
(;B[cs]C[RIGHT]))))
(;B[cn];W[cm];B[bm];W[an];B[ap];W[aq];B[am];W[ap];B[cq];W[cr])
(;B[bm];W[cn])
(;B[cq];W[cn];B[bq];W[ap];B[aq];W[an])
(;B[ap];W[aq];B[cm];W[cn];B[dn];W[em];B[bm];W[an];B[am];W[ap];B[cq];W[cr]))
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