invalid problem set
Problem | 7704 |
Created | 2005-11-23 |
Name | 8-point |
Source | Beginner game, KGS |
Rating | |
Difficulty | 19.2 kyu |
Average Solve Time | 23 secs |
User Attempts |
8468 / 16829 |
Solve Ratio Rating | 10 kyu |
| rating history |
It looks like white takes a vital point, but can black live without seki or ko?
(;AB[hs]AB[hr]AB[hq]AB[hp]AB[ip]AB[jp]AB[kp]AB[kq]AB[lq]AB[lr]AB[ls]AW[gs]AW[gr]AW[gq]AW[gp]AW[go]AW[ho]AW[io]AW[jo]AW[ko]AW[lo]AW[lp]AW[mp]AW[mq]AW[mr]AW[ms]AW[jr]AP[goproblems]
(;B[ir]
(;W[jq]C[CHOICE]
(;B[js]C[Black now has two eyes.RIGHT])
(;B[kr];W[js]C[Seki])
(;B[iq];W[js]
(;B[kr]C[Seki])
(;B[is];W[kr];B[ks];W[jr]C[Dead :-(])
(;B[ks];W[kr];B[is];W[jr]C[Dead :-(]))
(;B[is];W[kr]
(;B[js]C[Seki])
(;B[ks];W[js];B[iq];W[jr]C[Dead :-(])
(;B[iq];W[js];B[ks];W[jr]C[Dead :-(]))
(;B[ks];W[js]
(;B[kr]C[Seki])
(;B[iq];W[kr];B[is];W[jr]C[Dead :-(])
(;B[is];W[kr];B[iq];W[jr]C[Dead :-(])))
(;W[js]C[CHOICE];B[jq]C[Black now has two eyes.RIGHT]))
(;B[js];W[ir]C[CHOICE]
(;B[kr]C[];W[is]C[]
(;B[jq];W[ks]C[Ko])
(;B[iq];W[ks]C[Ko])
(;B[ks];W[iq];B[jq];W[ir]C[Dead :-(]))
(;B[jq];W[is]
(;B[kr];W[ks]C[Ko])
(;B[ks];W[iq];B[kr];W[ir]C[Dead :-(])
(;B[iq];W[ks]C[Dead :-(]))
(;B[is];W[kr]
(;B[iq];W[jq];B[ks];W[jr]C[Dead :-(])
(;B[jq]C[Seki])
(;B[ks];W[jq];B[iq];W[jr]C[Dead :-(]))
(;B[iq];W[is]
(;B[kr];W[ks]C[Ko])
(;B[ks]C[Seki])
(;B[jq];W[ks]C[Dead :-(]))
(;B[ks];W[is]
(;B[kr];W[iq];B[jq];W[ir]C[Dead :-(])
(;B[jq];W[iq];B[kr];W[ir]C[Dead :-(])
(;B[iq]C[Seki])))
(;B[jq];W[ir]
(;B[js];W[is]
(;B[kr];W[ks]C[Ko])
(;B[ks];W[iq];B[kr];W[ir]C[Dead :-(])
(;B[iq];W[ks]C[Dead :-(]))
(;B[kr];W[js]C[]
(;B[iq]C[Not a seki. White can still capture, starting with J1])
(;B[is]C[Seki])
(;B[ks]C[Not a seki. White can still capture, starting with J1]))
(;B[is];W[js]
(;B[iq];W[kr];B[ks];W[jr]C[Dead :-(])
(;B[kr]C[Seki])
(;B[ks]C[];W[kr];B[iq];W[jr]C[Dead :-(]))
(;B[iq];W[js]
(;B[kr]C[Not a seki. White can still capture, starting with J1])
(;B[is];W[kr];B[ks];W[jr]C[Dead :-(])
(;B[ks];W[kr];B[is];W[jr]C[Dead :-(]))
(;B[ks];W[js]
(;B[kr]C[Not a seki. White can still capture, starting at J1])
(;B[iq]C[Not a seki. White can still capture, starting at J1];W[kr];B[is];W[jr]C[Dead :-(])
(;B[is];W[kr];B[iq];W[jr]C[Dead :-(])))
(;B[iq];W[js]
(;B[kr];W[jq]
(;B[ir]C[Seki])
(;B[is]C[];W[ir];B[ks];W[jr]C[Dead :-(])
(;B[ks];W[ir];B[is];W[jr]C[Dead :-(]))
(;B[ir];W[jq]
(;B[kr]C[Seki])
(;B[ks];W[kr];B[is];W[jr]C[Dead :-(])
(;B[is];W[kr];B[ks];W[jr]C[Dead :-(]))
(;B[is];W[kr]
(;B[ks]C[]
(;W[ir]C[CHOICE];B[jq];W[jr]C[Dead :-(])
(;W[jq]C[CHOICE];B[ir];W[jr]C[Dead :-(]))
(;B[jq];W[ir];B[ks];W[jr]C[Dead :-(])
(;B[ir];W[jq];B[ks];W[jr]C[Dead :-(]))
(;B[ks];W[ir]
(;B[is]
(;W[jq]C[CHOICE];B[kr];W[jr]C[Dead :-(])
(;W[kr]C[CHOICE];B[jq];W[jr]C[Dead :-(]))
(;B[jq];W[kr];B[is];W[jr]C[Dead :-(])
(;B[kr];W[jq];B[is];W[jr]C[Dead :-(])))
(;B[is];W[js]
(;B[jq];W[ir]
(;B[ks];W[kr];B[iq];W[jr]C[Dead :-(])
(;B[kr]C[Seki])
(;B[iq];W[kr];B[ks];W[jr]C[Dead :-(]))
(;B[ir];W[jq]
(;B[iq];W[kr];B[ks];W[jr]C[Dead :-(])
(;B[kr]C[Seki])
(;B[ks];W[kr];B[iq];W[jr]C[Dead :-(]))
(;B[iq];W[kr]
(;B[ks];W[ir];B[jq];W[jr]C[Dead :-(])
(;B[ir];W[jq];B[ks];W[jr]C[Dead :-(])
(;B[jq];W[ir];B[ks];W[jr]C[Dead :-(]))
(;B[kr];W[jq]
(;B[ks];W[ir];B[iq];W[jr]C[Dead :-(])
(;B[iq];W[ir];B[ks];W[jr]C[Dead :-(])
(;B[ir]C[Seki]))
(;B[ks];W[ir]
(;B[kr];W[jq];B[iq];W[jr]C[Dead :-(])
(;B[jq];W[kr];B[iq];W[jr]C[Dead :-(])
(;B[iq];W[jq];B[kr];W[jr]C[Dead :-(]))))
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