invalid problem set
Problem | 10302 |
Created | 2007-09-04 |
Source | go board |
Rating | |
Difficulty | 3.2 dan |
Average Solve Time | 60 secs |
User Attempts |
324 / 1437 |
Solve Ratio Rating | 2 kyu |
| rating history |
I'm pretty sure I've covered everything... but mistakes do happen! Let me know if I've missed something :)
Thanks to Luniverse and Adam for pointing out a couple of errors.
(;AB[ar]AB[cr]AW[br]AW[cq]AW[cp]AW[co]AW[bo]AW[dp]AB[dr]AB[dq]AB[eq]AB[ep]AW[cn]AB[do]AB[dn]AB[dm]AB[cm]AB[bm]AB[bn]AW[eo]AW[en]AW[em]AW[el]AW[dl]AW[bk]TR[ar]AB[gp]C[Blacks last stone looks like a tesuji - maybe it is - but it definitely doesn't stop white from cleanly winning the race ;)]AP[goproblems]
(;W[am]C[NOTTHIS])
(;W[bl]C[NOTTHIS])
(;W[cl];B[ap]
(;W[an];B[ao]
(;W[bl];B[am]
(;W[al];B[an]
(;W[aq];B[bq])
(;W[bq];B[bs])
(;W[bs];B[bq]))
(;W[aq];B[bq]))
(;W[am];B[al])
(;W[bq];B[bs]
(;W[bl];B[am];W[al];B[an])
(;W[am];B[al])
(;W[aq];B[bp]))
(;W[aq];B[bq])
(;W[bs];B[bq])
(;W[bp];B[bq]))
(;W[ao];B[bq]
(;W[bp];B[an])
(;W[bl]TR[bp]TR[an]C[Black cannot atari from either sideRIGHT])
(;W[an];B[am])
(;W[am];B[al]
(;W[an];B[bp])
(;W[bl];B[an];W[am]C[RIGHT]))
(;W[bs];B[an]))
(;W[bq];B[ao]
(;W[bs];B[aq]C[Seki])
(;W[an];B[aq]
(;W[bs]C[Seki])
(;W[bl];B[am];W[al];B[an]
(;W[as];B[bs])
(;W[bs]C[Seki])))
(;W[aq];B[bs]C[Ko])
(;W[bl];B[bs])
(;W[am]C[NOTTHIS]))
(;W[bs];B[bq]
(;W[ao];B[an])
(;W[am]C[NOTTHIS])
(;W[bl];B[ao])
(;W[an];B[ao])
(;W[bp];B[ao]))
(;W[bl];B[ao]
(;W[an];B[am];W[al];B[an]
(;W[aq];B[bq])
(;W[bq];B[bs])
(;W[bp];B[bq]))
(;W[am];B[an]
(;W[aq];B[bq])
(;W[bp];B[bq])
(;W[bq];B[bs]))
(;W[aq];B[bq])
(;W[bq];B[bs])
(;W[bs];B[bq]))
(;W[am]C[NOTTHIS])
(;W[bp];B[ao]
(;W[am]C[NOTTHIS])
(;W[bl];B[bq])
(;W[bs];B[bq])
(;W[bq];B[bs])
(;W[aq];B[bq]))
(;W[aq];B[bq]
(;W[ao];B[an])
(;W[bp];B[ao])
(;W[an];B[ao])
(;W[bl];B[ao])
(;W[am]C[NOTTHIS])))
(;W[bq]
(;B[ap]C[CHOICE]
(;W[bs];B[ao]
(;W[aq]LB[cs:1]LB[cl:2]LB[an:3]LB[bl:4]LB[bp:5]C[After white 4, black cannot play 5 due to shortage of libertiesRIGHT])
(;W[an];B[aq]C[Seki])
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[cl];B[aq]C[Seki]))
(;W[cl];B[bs]
(;W[ao];B[aq]
(;W[bl]TR[an]TR[bp]C[Black cannot approachRIGHT])
(;W[an];B[am]))
(;W[bl];B[ao])
(;W[aq]C[Ko]))
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[an];B[bs]
(;W[ao];B[am]
(;W[aq];B[bp])
(;W[bl]C[NOTTHIS])
(;W[al]C[NOTTHIS])
(;W[cl];B[aq]))
(;W[bl]C[NOTTHIS])
(;W[am];B[ao])
(;W[cl];B[ao]
(;W[bl];B[am];W[al];B[an])
(;W[am];B[al])
(;W[aq];B[bp])))
(;W[ao];B[bs]
(;W[aq];B[an]C[Ko])
(;W[an];B[am]
(;W[aq];B[bp])
(;W[bl]C[NOTTHIS])
(;W[al]C[NOTTHIS])
(;W[cl];B[aq]))
(;W[bl]C[NOTTHIS];B[aq];W[cl]TR[an]TR[bp]C[Black cannot approachRIGHT])
(;W[cl];B[aq]
(;W[bl]TR[an]TR[bp]C[Black cannot approachRIGHT])
(;W[an];B[am]))
(;W[am];B[an];W[cl];B[al];W[bl]C[RIGHT]))
(;W[aq];B[bs]C[Ko]))
(;B[bs];W[ap]C[White wins easily]))
(;W[bs];B[bq]
(;W[bp];B[aq])
(;W[ap];B[cs]
(;W[cl];B[as]
(;W[an];B[bp];W[ao];B[am])
(;W[bl];B[bp];W[ao];B[aq]))
(;W[aq];B[as]
(;W[cl];B[br])
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[an];B[br])
(;W[bp];B[ao])
(;W[ao];B[an]))
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[an];B[am]C[Ko])
(;W[bp];B[as]))
(;W[ao];B[ap])
(;W[cl];B[ao])
(;W[bl];B[ao])
(;W[an];B[bp];W[ao];B[am])
(;W[am];B[ao]))
(;W[as];B[bs]
(;W[bq];B[ap]
(;W[aq]C[Ko])
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[cl];B[ao])
(;W[ao];B[an]))
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[cl];B[bq]
(;W[bl];B[ao])
(;W[am]C[NOTTHIS])
(;W[an];B[bp])))
(;W[an];B[bq]
(;W[am];B[al]
(;W[ao];B[ap])
(;W[bl];B[ao])
(;W[cl];B[ao])
(;W[ap];B[ao];W[an];B[bs]))
(;W[bl];B[bp]
(;W[am];B[ao])
(;W[cl];B[ao])
(;W[ao];B[am]))
(;W[cl];B[bp]
(;W[bl];B[ao])
(;W[am];B[ao])
(;W[ao];B[am]))
(;W[ap];B[bs]
(;W[am];B[bp]
(;W[ao];B[al])
(;W[bl];B[ao])
(;W[cl];B[ao]))
(;W[bp];B[aq])
(;W[ao];B[am]TR[aq]TR[bp]MA[al]MA[bl]MA[cl]C[2 libs vs 3 libs]))
(;W[ao];B[am]LB[ap:1]LB[bp:2]LB[al:1]LB[bl:2]LB[cl:3]C[3 libs vs 2 libs])
(;W[bp];B[aq]TR[ap]TR[ao]MA[bl]MA[cl]MA[am]C[2 libs vs 3 libs])
(;W[aq];B[ap])
(;W[bs];B[bp];W[ao];B[am]))
(;W[ao];B[bq]
(;W[cl];B[ap]
(;W[bl]TR[an]TR[bp]C[Black cannot atari from either sideRIGHT])
(;W[am];B[al]
(;W[an];B[bp])
(;W[bl];B[an];W[am]C[RIGHT]))
(;W[an];B[am]))
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[an];B[am]TR[ap]TR[bp]MA[al]MA[bl]MA[cl]C[2 libs vs 3 libs])
(;W[bp];B[aq])
(;W[aq];B[ap])
(;W[bs];B[ap])
(;W[ap];B[an]))
(;W[ap];B[bq]
(;W[bp];B[bs])
(;W[an];B[bs];W[cl];B[bp];W[ao];B[am])
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[cl];B[bs]
(;W[am]C[NOTTHIS])
(;W[bl];B[bp];W[ao];B[aq])
(;W[an];B[bp];W[ao];B[am]))
(;W[ao];B[aq])
(;W[bs];B[cs]
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[an];B[am]C[Ko])
(;W[ao];B[an])
(;W[cl];B[as]
(;W[an];B[bp];W[ao];B[am])
(;W[bl];B[bp];W[ao];B[aq]))))
(;W[aq];B[ap]
(;W[as];B[ao]
(;W[bp];B[bq])
(;W[bq]C[];B[cs]C[Ko])
(;W[bs];B[bq]))
(;W[bq];B[bs]C[Ko])
(;W[bs];B[bq]
(;W[ao];B[cs]
(;W[bl]C[NOTTHIS])
(;W[cl];B[an])
(;W[am];B[an])
(;W[an];B[am])
(;W[bp];B[an]))
(;W[cl];B[ao])
(;W[bl];B[ao])
(;W[am];B[ao])
(;W[an];B[ao]))
(;W[bl]C[NOTTHIS])
(;W[am]C[NOTTHIS])
(;W[cl];B[bq]
(;W[ao];B[an])
(;W[bp];B[ao])
(;W[an];B[ao])
(;W[bl];B[ao])
(;W[am]C[NOTTHIS])))
(;W[bp];B[aq]
(;W[bs];B[bq])
(;W[bq];B[bs])
(;W[ap];B[bs])))
Toggle next/previous buttons