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life and death
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+2
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Problem | 15452 |
Created | 2011-12-10 |
Source | Sensei's library |
Rating | |
Difficulty | 1.4 dan |
Average Solve Time | 71 secs |
User Attempts |
274 / 861 |
Solve Ratio Rating | 4 kyu |
| rating history |
Found this one on senseis. I hope that every variation is covered.
(;AB[bb]AB[ha]AB[ia]AB[ka]AB[kb]AB[jb]AB[ic]AB[hc]AB[hd]AB[gd]AB[jd]AW[cb]AW[db]AW[dd]AW[dc]AW[ed]AW[fd]AW[ge]AW[gf]AW[ff]AW[ef]AW[df]AW[gc]AW[gb]AW[hb]AW[ib]AB[eb]AB[cc]AB[cd]AB[ce]AB[cg]AB[dg]AB[bh]AB[eh]AB[gg]AB[hg]AB[if]C[Black to Kill, please keep in mind that playing at A won't accomplish anything, it will only reduce white eye]LB[de:A]AP[goproblems]
(;B[bi]C[NOTTHIS])
(;B[ja]
(;W[ga]
(;B[fc]C[RIGHT])
(;B[fb];W[fc];B[ea];W[ca]C[white lives])
(;B[fa];W[fc];B[da];W[ca]C[Black cannot prevent white life])
(;B[da];W[fc]
(;B[ca];W[ea]
(;B[fa];W[ba]
(;B[aa];W[fb];B[ba];W[ec];B[ea];W[bc];B[bd];W[ab])
(;B[ea];W[bc];B[aa];W[fb];B[ba];W[ec];B[bd];W[ab])
(;B[bc];W[ea]
(;B[da];W[ca];B[de];W[ee];B[cf];W[fb];B[hf];W[ec])
(;B[ca];W[da])))
(;B[fb];W[fa])
(;B[ec];W[fb])
(;B[ba];W[fa]))
(;B[ea];W[ca])
(;B[fa];W[ca]C[Black cannot prevent white life])
(;B[fb];W[ea]
(;B[ca];W[fa])
(;B[fa];W[ca])
(;B[ba];W[ca]))
(;B[ba];W[ca])
(;B[ec];W[ca])))
(;W[fb]
(;B[fa];W[ec]
(;B[ea]
(;W[ga];B[fc]C[RIGHT])
(;W[da];B[ga]C[RIGHT]))
(;B[da];W[ea]C[It's either a ko or a and b become miai]LB[ca:a]LB[ga:b]))
(;B[ea];W[fa]
(;B[ec];W[da])
(;B[da];W[ca])
(;B[ca];W[da])
(;B[ga];W[fc]
(;B[da];W[ca])
(;B[ca];W[da])))
(;B[ga];W[ea]
(;B[fa];W[ec])
(;B[da];W[ca]
(;B[fa];W[ec])
(;B[ec];W[fc]))
(;B[ca];W[ec]))
(;B[da];W[fa]
(;B[ec];W[ea])
(;B[ea];W[ca])
(;B[ca];W[ea])
(;B[ga];W[ec]
(;B[ea];W[ca])
(;B[ca];W[ea]))))
(;W[fa]
(;B[fb]LB[ga:a]LB[fc:b]C[a and b are miaiRIGHT])
(;B[ea];W[fb]
(;B[ec];W[da])
(;B[da];W[ca])
(;B[ca];W[da])
(;B[ga];W[fc]
(;B[da];W[ca])
(;B[ca];W[da])))
(;B[fc];W[fb]
(;B[ea];W[ec])
(;B[ec];W[ea])
(;B[ga];W[ec])
(;B[da];W[ca]
(;B[ga];W[ec])
(;B[ea];W[ec])
(;B[ec];W[ea])))
(;B[ec];W[fc]
(;B[ea];W[da])
(;B[da];W[ea])
(;B[ga];W[ea])
(;B[ca];W[ea]))
(;B[da];W[fc]
(;B[ca];W[ea])
(;B[ea];W[ca];B[ga];W[fb])
(;B[ec];W[ea])
(;B[ga];W[fb]
(;B[ca];W[ea])
(;B[ea];W[ca]))
(;B[fb];W[ga]
(;B[ca];W[ea])
(;B[ea];W[ca])))))
(;B[de]C[NOTTHIS])
(;B[ga];W[fa]
(;B[ja];W[fb])
(;B[fb];W[ja]))
(;B[fc];W[fb]
(;B[ea];W[ec]
(;B[fa];W[da]LB[ga:A]C[Connecting at A is oiotoshi])
(;B[ga];W[da]LB[fa:A]C[Connecting at A is oiotoshi])
(;B[da];W[ca])
(;B[ca];W[da]
(;B[ga];W[fa])
(;B[fa];W[ga])))
(;B[fa];W[ec]
(;B[ea];W[da]LB[ga:A]C[Connecting at A is oiotoshi])
(;B[ga];W[ea])
(;B[ca];W[ea])
(;B[da];W[ca]
(;B[ga])
(;B[ea];W[ga])))
(;B[ec];W[ea])
(;B[ga];W[ec]
(;B[fa];W[ea])
(;B[ea];W[da]LB[fa:A]C[Connecting at A is oiotoshi])
(;B[ca];W[ea])
(;B[da];W[ea]))
(;B[da];W[ec]
(;B[ea];W[ca])
(;B[ga];W[ca];B[fa];W[ea])
(;B[fa];W[ca]
(;B[ga];W[ea])
(;B[ea];W[ga]))
(;B[ca];W[ea]))
(;B[ca];W[ea]))
(;B[fb];W[ga]
(;B[fc];W[ja]
(;B[ia];W[ea])
(;B[ha];W[ea];B[ia];W[ja])
(;B[fa];W[ec]C[White has 1 more liberty];B[da];W[ca]C[])
(;B[ea];W[da]
(;B[ha];W[ec])
(;B[ia];W[ec]))
(;B[ec];W[ea])
(;B[da];W[ea]
(;B[ec];W[fa])
(;B[fa];W[ec])
(;B[ca];W[ec];B[fa];W[ea])))
(;B[ja];W[fc];B[ea];W[ca]C[white lives])
(;B[ca];W[fc]
(;B[ea];W[da])
(;B[da];W[ea];B[fa];W[ec];B[ea];W[ba])
(;B[fa];W[da]))
(;B[da];W[fc]
(;B[ca];W[ea];B[fa];W[ec];B[ea];W[ba])
(;B[ea];W[ca]))
(;B[fa];W[fc]
(;B[ca];W[da])
(;B[da];W[ca]))
(;B[ea];W[fc];B[ca];W[da]))
(;B[fa];W[ga]
(;B[fc];W[ja]
(;B[ia];W[ec])
(;B[ha];W[ec]))
(;B[fb];W[fc]
(;B[ca])
(;B[da];W[ca]))
(;B[da];W[ja]
(;B[ca];W[fb]
(;B[ec];W[fc])
(;B[ia];W[ec];B[ea];W[ba])
(;B[ba];W[ia]))
(;B[ia];W[fb]
(;B[ec];W[fc])
(;B[ca];W[ec];B[ea];W[ba]))
(;B[fc];W[fb]
(;B[ia];W[ec]
(;B[ca];W[ea])
(;B[ea];W[ca]))
(;B[ea];W[ec]
(;B[ca];W[ba])
(;B[ia];W[ca]))
(;B[ec];W[ea])
(;B[ca];W[ec]
(;B[ia];W[ea])
(;B[ea];W[ba])))
(;B[ha];W[fb]
(;B[ia];W[ja]
(;B[ha];W[ec])
(;B[ia];W[ec]
(;B[ca];W[ea])
(;B[ea];W[ca]))
(;B[ec];W[fc])
(;B[fc];W[ec]))
(;B[ec];W[fc])
(;B[ca];W[ec]
(;B[ea];W[ba])
(;B[ia];W[ea])
(;B[ba];W[ea])))
(;B[fb];W[fc]
(;B[ia];W[ca];B[de];W[ee])
(;B[ca]
(;W[ia])
(;W[ec]
(;B[ba];W[ea])
(;B[ea];W[ba]))))
(;B[ec];W[fc]
(;B[ia];W[ca])
(;B[ca];W[fb]))
(;B[ea];W[fc]
(;B[ca];W[ia])
(;B[ec];W[ca])
(;B[fb];W[ca])
(;B[ia];W[ca])))
(;B[ec];W[ja]
(;B[fc];W[fb])
(;B[fb];W[fc])
(;B[da];W[fc];B[ia];W[ca])
(;B[ea];W[fc]
(;B[ia];W[da])
(;B[da];W[ca]))
(;B[ca];W[da]
(;B[fc];W[fb])
(;B[ia];W[fc])))
(;B[ea];W[fc]
(;B[ja];W[da])
(;B[da];W[ca])
(;B[ca];W[da])
(;B[ec];W[da])
(;B[fb];W[da]))
(;B[ca];W[da]
(;B[fc];W[ja]
(;B[ia];W[ec])
(;B[ha];W[ec];B[ia];W[ja])
(;B[fb];W[ec])
(;B[ec];W[ea])
(;B[ea];W[ec]))
(;B[ec];W[fc]))
(;B[ja];W[fc];B[da];W[ca]C[Black cannot prevent white life]))
(;B[ec];W[fb]
(;B[fa];W[fc]
(;B[ea];W[ga])
(;B[da];W[ga]
(;B[ca];W[ea])
(;B[ea];W[ca])
(;B[ja];W[ea]))
(;B[ga];W[ea])
(;B[ca];W[ea]))
(;B[ga];W[ea])
(;B[ea];W[fa]
(;B[ga];W[fc]
(;B[ca];W[da])
(;B[da];W[ca]))
(;B[fc])
(;B[da];W[ca];B[ga]
(;W[fc])
(;W[ja]))
(;B[ca];W[da]))
(;B[fc];W[ea])
(;B[da];W[fc]
(;B[fa];W[ga]
(;B[ca];W[ea])
(;B[ea];W[ca])
(;B[ja];W[ea]))
(;B[ea];W[fa]
(;B[ga];W[ca])
(;B[ca];W[ba]))
(;B[ca];W[ea])
(;B[ga];W[ea]))
(;B[ca];W[ea]))
(;B[ea];W[ga]
(;B[fc];W[ja]
(;B[ia];W[fb]
(;B[fa];W[ec])
(;B[ec];W[da])
(;B[da];W[ca]))
(;B[ha];W[fb];B[ia];W[ec])
(;B[fb];W[da]
(;B[ha];W[ec])
(;B[ia];W[ec]))
(;B[ec];W[da]
(;B[ia];W[fb])
(;B[fb];W[fa])
(;B[ha];W[fb];B[ia];W[fa]))
(;B[fa];W[fb]
(;B[ia];W[ec])
(;B[ha];W[ec];B[ia];W[ja])
(;B[da];W[ec]
(;B[ca];W[ba])
(;B[ia]))
(;B[ca];W[da]))
(;B[ca];W[da]
(;B[fb];W[fa])
(;B[ec];W[fb])
(;B[fa];W[ec])))
(;B[ja];W[fc]
(;B[ec];W[da])
(;B[ca];W[da])
(;B[da];W[ca])
(;B[fa];W[da])
(;B[fb];W[ca]C[white lives]))
(;B[ca];W[da]
(;B[fc];W[ja]
(;B[fb];W[fa])
(;B[ec];W[fb])
(;B[fa]))
(;B[ja];W[fc])
(;B[fb];W[fc])
(;B[ec];W[fc]))
(;B[da];W[ca]
(;B[fc];W[ja]
(;B[ia];W[fb])
(;B[ha];W[fb];B[ia];W[ec])
(;B[fb];W[ec])
(;B[fa];W[fb]))
(;B[fb];W[fc])
(;B[ec];W[fc]))
(;B[ec];W[fc]
(;B[ca];W[da])
(;B[da];W[ca])
(;B[fb];W[da])
(;B[fa];W[da]))
(;B[fb];W[fc];B[ca])
(;B[fa];W[fc]
(;B[ja];W[da])
(;B[da];W[ca])
(;B[ca];W[da])
(;B[ec];W[da])
(;B[fb];W[da])))
(;B[da];W[fa]
(;B[ea];W[ca]
(;B[fb];W[fc];B[ga];W[ec]
(;B[ja];W[fa])
(;B[fa];W[ja]))
(;B[ga];W[fc];B[fb];W[ec]
(;B[ja];W[fa])
(;B[fa];W[ja]))
(;B[fc];W[ec];B[ga];W[fb])
(;B[ec];W[fc];B[ga];W[fb]))
(;B[fc];W[fb]
(;B[ea])
(;B[ec];W[ca])
(;B[ca];W[ec]
(;B[ba];W[ea])
(;B[ea];W[ba])))
(;B[fb];W[fc]
(;B[ga]
(;W[ca];B[ea];W[ec]
(;B[ja];W[fa])
(;B[fa];W[ja]))
(;W[ja]
(;B[ca];W[ga]
(;B[ia];W[ea])
(;B[ea];W[ia]))
(;B[ea];W[ca]
(;B[ga];W[ha])
(;B[ia];W[ga]))))
(;B[ea];W[ca];B[ga];W[ec]
(;B[ja];W[fa])
(;B[fa];W[ja]))
(;B[ec];W[ea])
(;B[ca];W[ba];B[aa];W[ga]
(;B[ea];W[ec];B[ba];W[bc])
(;B[ba];W[ea])))
(;B[ec];W[fc]
(;B[ea];W[ca];B[ga];W[fb])
(;B[ca];W[ea])
(;B[ga];W[ca]))
(;B[ca];W[ba]
(;B[aa];W[fb]
(;B[ec];W[fc]
(;B[ea];W[ba])
(;B[ba];W[ea]))
(;B[ea];W[ec];B[ba];W[bc])
(;B[ba];W[ea]))
(;B[ea];W[fb]
(;B[aa];W[ec];B[ba];W[bc])
(;B[ec];W[fc]))
(;B[fb];W[fc];B[aa];W[ga]
(;B[ea];W[ec];B[ba];W[bc])
(;B[ba];W[ea]))
(;B[fc];W[fb]
(;B[ea];W[ec])
(;B[ec];W[ea]))
(;B[ec];W[ea]))
(;B[ga];W[fb]
(;B[ca];W[ba]
(;B[aa];W[ec]
(;B[ba];W[ea])
(;B[ea];W[ba]))
(;B[ea];W[ec]))
(;B[ea];W[fc]
(;B[ca];W[ba];B[aa];W[bc]
(;B[bd];W[ec]
(;B[ac];W[ba])
(;B[ba];W[ab]))
(;B[ba];W[ec])
(;B[ac];W[ec]
(;B[bd];W[ba])
(;B[ba];W[ab])))
(;B[ba];W[ca]))
(;B[ba];W[ca])
(;B[fc];W[ec];B[ca];W[ea])
(;B[ec];W[fc]
(;B[ca];W[ea])
(;B[ea];W[ca]))))
(;B[ca];W[fb]
(;B[ea];W[da]
(;B[ga];W[ec]LB[fa:a]C[a is oiotoshi])
(;B[fa];W[ec])
(;B[ec];W[fa]))
(;B[ec];W[ea])
(;B[ga];W[fa]
(;B[ea];W[ja]
(;B[da];W[ba];B[aa];W[ec];B[ba];W[bc])
(;B[ia];W[da]))
(;B[da];W[ba]
(;B[aa];W[ec]
(;B[ba];W[ea])
(;B[ea];W[ba]))
(;B[ea];W[ec])))
(;B[da];W[fa]
(;B[ec];W[ea])
(;B[ea];W[ba]
(;B[aa])
(;B[ec];W[fc])))
(;B[fa];W[ec]
(;B[ga];W[ea])
(;B[ea];W[da])
(;B[da];W[ea]C[ko]))))
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