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tesuji
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Problem | 12050 |
Created | 2008-12-12 |
Source | |
Rating | |
Difficulty | 8 dan |
Average Solve Time | 137 secs |
User Attempts |
28 / 216 |
Solve Ratio Rating | 2 dan |
| rating history |
White to play.
Kill all black stones on the right side ! (marked stones)
All comments appreciated ;)
(;AB[rq]AB[qq]AB[sp]AB[so]AB[ro]AW[rn]AW[rm]AB[rl]AB[ql]AB[rj]AW[qo]AW[qp]AW[rp]AW[pq]AW[pr]AW[po]AW[oo]AB[pn]AW[ol]AW[pk]AW[qk]AB[pm]AW[nn]AW[qi]AW[pi]AW[og]AW[pf]AW[rf]AB[ri]AB[si]AW[rh]AW[sh]AB[qh]AB[qg]AB[rg]AB[qc]AB[oc]AB[ob]AB[nb]AW[nc]AW[mc]AW[od]AW[oe]AB[nd]AW[me]AB[mb]AB[lc]AB[kc]AW[md]TR[qg]TR[qh]TR[rg]TR[ri]TR[rj]TR[si]TR[rl]TR[ql]TR[pm]TR[pn]TR[so]TR[ro]TR[sp]TR[rq]TR[qq]C[Ko is not a solution]AP[goproblems]
(;W[se];B[qn]C[T15 is nice ;)]
(;W[sr]
(;B[rr]
(;W[sq];B[ss]
(;W[sq]
(;B[sg]C[CHOICE]
(;W[rk];B[re]
(;W[rd];B[qe]
(;W[qf];B[sf]
(;W[qd];B[sd]
(;W[rc];B[rb]
(;W[pc];B[sc];W[qb];B[ra];W[sb]C[Very Nice !RIGHT])
(;W[pd];B[sc])
(;W[sc];B[pd];W[se]C[ko])
(;W[qb];B[pc]
(;W[sc];B[pd];W[se]C[ko])
(;W[pd];B[sc])
(;W[sb];B[pd];W[ra];B[pe]))
(;W[pe];B[sc];W[se];B[re])
(;W[sb];B[pd]))
(;W[sc];B[rc];W[se]C[ko]))
(;W[sd];B[qd]))
(;W[qd];B[qf]))
(;W[qf];B[sf]
(;W[rd];B[sd]
(;W[qd];B[rc])
(;W[rc];B[qd])
(;W[qe];B[se]
(;W[rc];B[qd])
(;W[qd];B[rc]))
(;W[sc];B[se]
(;W[qd];B[rc])
(;W[rc];B[qd])
(;W[qe];B[qd])))
(;W[sd];B[rd])
(;W[qd];B[rd];W[rc];B[rb]))
(;W[qe];B[rd]
(;W[sf];B[qf])
(;W[qf];B[sf]))
(;W[qd];B[rd];W[rc];B[rb])
(;W[pe];B[rd]
(;W[sf];B[qf])
(;W[qf];B[sf]))
(;W[sd];B[qe];W[qf];B[sf]))
(;W[sn];B[rk]))
(;B[sr]C[NOTTHIS]
(;W[sn];B[sq]
(;W[qr]
(;B[sg]
(;W[rk];B[re]
(;W[rd];B[qe]
(;W[qf];B[sf]
(;W[qd];B[sd]
(;W[rc];B[rb]
(;W[pc];B[sc];W[qb];B[ra]
(;W[sb]C[Very nice !RIGHT])
(;W[qa];B[sb]C[arg !]))
(;W[sc];B[pd];W[se]C[only ko])
(;W[pd];B[sc])
(;W[pe];B[sc];W[se];B[re])
(;W[qb];B[pc]
(;W[sb];B[pd];W[ra];B[pe])
(;W[pe];B[sc];W[se];B[re])
(;W[pd];B[sc])
(;W[sc];B[pd];W[se]C[ko])))
(;W[sc];B[rc];W[se]C[ko])
(;W[pe];B[rc];W[se];B[re]))
(;W[sd];B[qd]))
(;W[qd];B[qf]))
(;W[qf];B[sf]
(;W[rd];B[sd]
(;W[qd];B[rc])
(;W[qe];B[se]
(;W[rc];B[qd])
(;W[qd];B[rc]))
(;W[rc];B[qd];W[qe];B[se]))
(;W[sd];B[rd]))
(;W[qe];B[rd]
(;W[sf];B[qf])
(;W[qf];B[sf]))
(;W[qd];B[rd]
(;W[qf];B[sf];W[rc];B[rb])
(;W[sf];B[qf])))
(;W[sk]C[NOTTHIS])
(;W[sl]C[NOTTHIS]))
(;B[rk]C[NOTTHIS];W[sg];B[sf];W[sg];B[sh];W[sf];B[qf];W[qe]))
(;W[rs]C[NOTTHIS]))
(;W[rk]C[This move easily kill black after T3-T2 exchangeRIGHT])))
(;W[rk];B[sq];W[sl];B[sm]))
(;W[sn];B[sq]
(;W[rs];B[rk]
(;W[qr];B[sg])
(;W[sg];B[ss]C[ko]))
(;W[rk];B[rs]))
(;W[rk];B[sq]
(;W[rs];B[qs]
(;W[sn];B[ss])
(;W[sl];B[qr])
(;W[qr];B[ss];W[sl];B[sm]))
(;W[sl];B[sm])
(;W[sk];B[sm]
(;W[sl];B[qm];W[rs];B[qs])
(;W[rs];B[qs])
(;W[qs];B[rs])))
(;W[rs];B[rk]
(;W[sg];B[sm]
(;W[sq];B[ss];W[sq];B[sr])
(;W[qr];B[sn];W[sq];B[qm]))
(;W[sn];B[sg])
(;W[qr];B[sg])))
(;B[sq]C[NOTTHIS];W[rr]))
(;W[rr];B[rk]
(;W[qr];B[sg])
(;W[sg];B[sm]))
(;W[sn]
(;B[sq]C[CHOICE];W[rk];B[qr])
(;B[rk]C[CHOICE]
(;W[sq];B[sg])
(;W[sg];B[sq])))
(;W[rk];B[qr]
(;W[sl];B[sk]
(;W[sm];B[qm];W[sj]C[ko])
(;W[sj];B[qm]
(;W[sk];B[sm])
(;W[sm];B[sk]C[ko])))
(;W[sk];B[sm]
(;W[qs];B[rs])
(;W[sl];B[qm])
(;W[sr];B[sq]
(;W[rs];B[qs])
(;W[qs];B[rs])
(;W[sl];B[qm])))
(;W[sr];B[sq]
(;W[rs];B[qs];W[ps];B[sm])
(;W[sl];B[sm]
(;W[sk];B[qm])
(;W[sn];B[qm];W[qs];B[sm]
(;W[rs];B[rn])
(;W[rn];B[rs])))
(;W[sk];B[sm]
(;W[rs];B[qs])
(;W[qs];B[rs])
(;W[sl];B[qm])))
(;W[rs];B[qs];W[sl];B[sk]
(;W[sj];B[qm];W[sm];B[sk]C[ko])
(;W[sm];B[qm];W[sj]C[ko])))
(;W[qr];B[rk]
(;W[sn];B[sg])
(;W[sg];B[sm]))
(;W[sg];B[qr]
(;W[rk];B[sm])
(;W[sr];B[sq]
(;W[qs];B[rs];W[ps];B[sm])
(;W[rs];B[qs];W[ps];B[sm])
(;W[rk];B[sm]
(;W[qs];B[rs])
(;W[rs];B[qs])))))
(;W[qf];B[rk]LB[rh:1]LB[sj:2]C[Black has 2 eyes])
(;W[rk];B[qf]
(;W[qe];B[re])
(;W[re];B[qe]))
(;W[qn];B[qf]
(;W[re];B[qe])
(;W[qe];B[re]))
(;W[sf];B[qf];W[qe];B[sg]
(;W[re];B[rk])
(;W[rd];B[rk])
(;W[rk];B[re]))
(;W[re];B[rk])
(;W[sr];B[rk]))
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