invalid problem set
Previous
|
Next
|
|
|
life and death
|
|
+7
|
|
Next
|
Problem | 4222 |
Created | 2004-04-08 |
Source | 2k v. 3d game in Delft |
Rating | |
Difficulty | 5.8 kyu |
Average Solve Time | 54 secs |
User Attempts |
1365 / 4757 |
Solve Ratio Rating | 4 kyu |
| rating history |
With thanks to Hans and Verbal.
(;AB[dr]AW[dq]AW[cr]AW[cq]AB[eq]AB[es]AB[fq]AB[gq]AB[hq]AB[jq]AB[jr]AW[ep]AW[fp]AW[gp]AW[hp]AW[ip]AW[jp]AW[kq]AW[kr]AW[js]AB[fr]AP[goproblems]
(;W[gs];B[is]
(;W[cs];B[iq]
(;W[hr];B[ks]
(;W[ds];B[er]C[seki])
(;W[gr];B[hs];W[ds];B[er]C[seki])
(;W[hs];B[gr]C[seki])
(;W[fs];B[hs])
(;W[lr];B[hs]
(;W[ds];B[gr])
(;W[gr];B[ds])
(;W[ls];B[ds]))
(;W[mr];B[hs]
(;W[ds];B[gr])
(;W[gr];B[ds])
(;W[ls];B[ds])))
(;W[gr];B[hr])
(;W[hs];B[ks]
(;W[hr];B[gr]C[seki])
(;W[ds];B[hr]))
(;W[ds];B[hr]
(;W[er];B[fs])
(;W[hs];B[ks])
(;W[fs];B[er])))
(;W[ir];B[ks]
(;W[iq];B[hr]
(;W[hs]C[and Black resigned.RIGHT])
(;W[cs];B[hs];W[ds];B[lr]C[Black tries to escape and may well succeed. This is not as good as the solution, where Black gets captured outright.])
(;W[js];B[hs]))
(;W[hs];B[iq]C[Ko])
(;W[cs];B[iq]C[Alive])
(;W[hr];B[iq]
(;W[hs];B[fs];W[js];B[gr])
(;W[gr];B[fs])
(;W[fs];B[gr])
(;W[cs];B[gr]))
(;W[gr];B[iq])
(;W[fs];B[iq])
(;W[ls];B[iq]
(;W[js];B[hr])
(;W[hs];B[hr];W[js];B[ir])
(;W[hr];B[gr])
(;W[cs];B[hr])
(;W[fs];B[hr])
(;W[gr];B[hr])))
(;W[iq];B[hr]
(;W[cs];B[ds];W[fs]C[RIGHT])
(;W[ir];B[hs])
(;W[fs];B[cs]
(;W[ir];B[hs])
(;W[bs];B[hs]C[Ko]))
(;W[ds];B[cs]C[Alive.])
(;W[hs];B[ir]C[Alive.]))
(;W[hr];B[iq]
(;W[ir];B[gr];W[hs];B[fs])
(;W[cs];B[ks]
(;W[ds];B[er]C[seki])
(;W[gr];B[hs];W[ds];B[er]C[seki])
(;W[hs];B[gr]C[seki])
(;W[fs];B[hs])
(;W[lr];B[hs]
(;W[ds];B[gr])
(;W[gr];B[ds])
(;W[ls];B[ds]))
(;W[mr];B[hs]
(;W[ds];B[gr])
(;W[gr];B[ds])
(;W[ls];B[ds])))
(;W[hs];B[ir])
(;W[gr];B[ir])
(;W[fs];B[gr])
(;W[ks];B[gr]
(;W[hs];B[fs])
(;W[cs];B[ds];W[hs];B[fs])))
(;W[hs];B[ir]
(;W[iq];B[hr])
(;W[hr];B[iq])
(;W[ks];B[fs])
(;W[fs];B[hr];W[cs];B[gr]
(;W[ds];B[gs];W[er]C[Ko])
(;W[gs];B[ds]))
(;W[cs];B[ds];W[fs]C[RIGHT])
(;W[ds];B[cs]
(;W[bs];B[fs]
(;W[ds]C[Ko])
(;W[iq];B[ks]
(;W[ds];B[lr]C[Ko, or Black will escape.])
(;W[ls];B[ds]))
(;W[ks];B[ds]))
(;W[fs];B[hr];W[bs];B[gr];W[ds];B[gs];W[er]C[Ko])))
(;W[gr];B[hr])
(;W[fs];B[iq]
(;W[cs];B[hs]
(;W[ds];B[er])
(;W[hr];B[gr])
(;W[ir];B[gr]))
(;W[hs];B[ks]
(;W[hr];B[gr])
(;W[cs];B[hr])
(;W[ds];B[cs]
(;W[hr];B[gr])
(;W[bs];B[hr]))
(;W[ls];B[hr]))
(;W[hr];B[gr]))
(;W[ks];B[hr]
(;W[cs];B[hs]
(;W[ds];B[iq])
(;W[iq];B[ds]))
(;W[iq];B[ds])
(;W[hs];B[ir])
(;W[ir];B[hs])))
(;W[cs];B[ir]
(;W[ds];B[gs]C[Ko])
(;W[gs];B[hs]
(;W[ds];B[gr]C[Black lives.])
(;W[gr];B[ds])
(;W[iq];B[ds])
(;W[ks];B[ds]))
(;W[iq];B[ds]
(;W[hr];B[gs])
(;W[gs];B[hs])
(;W[is];B[hr])
(;W[hs];B[hr])
(;W[gr];B[hr]))
(;W[is];B[hs]
(;W[ds];B[ks]C[The marked points are miai for life.]MA[js]MA[gr])
(;W[ks];B[ds])
(;W[iq];B[ks]))
(;W[hs];B[gs]
(;W[hr];B[gr])
(;W[is];B[hr])
(;W[iq];B[hr])
(;W[ds];B[hr]))
(;W[ks];B[ds]
(;W[gs];B[hs])
(;W[is];B[hs])
(;W[hs];B[is])
(;W[iq];B[hr])
(;W[hr];B[hs])
(;W[fs];B[gs]))
(;W[hr];B[hs]))
(;W[iq];B[hr]
(;W[gs];B[hs])
(;W[ir];B[ds])
(;W[cs];B[ds])
(;W[is];B[ds])
(;W[hs];B[gs]))
(;W[ir];B[hr])
(;W[hr];B[gs]
(;W[gr];B[ir])
(;W[iq];B[gr])
(;W[ir];B[iq]
(;W[gr];B[is])
(;W[is];B[gr])
(;W[cs];B[ds])
(;W[hs]C[Black lives as it stands, and could capture 3 stones by playing G2.]))
(;W[cs];B[ds])
(;W[hs];B[iq]
(;W[gr];B[is])
(;W[is];B[gr])
(;W[cs];B[is]
(;W[ir];B[ds])
(;W[ds];B[ks];W[er]C[Ko]))
(;W[ir]C[Black is alive as it stands and can capture 3 stones by playing G2.]))
(;W[is];B[gr])
(;W[ds];B[cs]))
(;W[hs];B[gs])
(;W[is];B[gs])
(;W[gr];B[hr])
(;W[ks];B[gs])
(;W[ds];B[gs]
(;W[er];B[hr]
(;W[fs];B[is])
(;W[is];B[dr]C[Ko]))
(;W[hr];B[cs])
(;W[hs];B[cs])
(;W[iq];B[cs])
(;W[ir];B[cs])
(;W[is];B[cs])
(;W[cs];B[hr]
(;W[is];B[er])
(;W[er];B[is])
(;W[iq];B[ir]
(;W[er];B[is])
(;W[is];B[er]))
(;W[ir];B[iq])))
(;W[fs];B[gs]C[Alive and well.])
(;W[kp];B[ir]C[Very much alive now.]))
Toggle next/previous buttons