Problem 5317
Created 2004-10-22
Source Gui Yong Liao 9p and Bo Ding 5p at EGC 2004 in Tuchola, also GZP End 175
Rating
Difficulty 5.7 dan
Average Solve Time 78 secs
User Attempts
245 / 1727
Solve Ratio Rating 2 dan
rating history
This is a variation on problem 1489, Jimmy Cha's famous problem.
This time, it is not a matter of killing Black, but for Black to live.
The source mentioned is two chinese professionals who were in Tuchola, Poland for EGC 2004 (of which I was a participant). Although it's just a variation of an existing problem, I found it interesting, though not that hard if you know the original.
If you know the original, try solving this problem entirely in your head. (a good exercise anyhow :)
(This problem also exists in the Guan Zi Pu)
(;AB[bp]AB[bq]AB[cr]AB[dr]AB[er]AB[fr]AB[gr]AB[hr]AW[ao]AW[bo]AW[co]AW[cp]AW[cq]AW[br]AW[dq]AW[eq]AW[fq]AW[gq]AW[hq]AW[ir]AW[hs]AW[kr]AW[iq]C[Black to live without Ko]AP[goproblems]
(;B[ar];W[bs]
(;B[aq];W[gs]
(;B[fs];W[cs]
(;B[is];W[ds]
(;B[hs];W[js]C[Black cannot approach, so he is dead.])
(;B[es]
(;W[hs]
(;B[as]C[Black livesRIGHT])
(;B[gs];W[ap];B[as];W[cs]
(;B[bs];W[br])
(;B[ds];W[bs])))
(;W[ap]C[CHOICE]
(;B[hs]
(;W[as];B[bq]C[Black livesRIGHT])
(;W[js];B[as];W[cs]
(;B[br]C[RIGHT])
(;B[bs];W[br])
(;B[ds]C[RIGHT])))
(;B[as];W[cs]
(;B[hs];W[br]
(;B[bs];W[br])
(;B[ds];W[bs]))
(;B[br];W[hs])
(;B[bs];W[br])
(;B[ds];W[bs];B[br];W[hs]))))
(;B[js];W[hs])
(;B[as];W[ap]))
(;B[ds];W[es])
(;B[as];W[ap])
(;B[js];W[is]))
(;B[cs];W[fs]
(;B[es];W[ds])
(;B[as];W[es]))
(;B[as];W[ap])
(;B[es];W[cs])
(;B[is];W[js]C[This is a nice variation. Brings back memories... Muhahaha. Go ahead, make my day. :)]
(;B[fs];W[cs]
(;B[is];W[ds]
(;B[hs];W[ap];B[es];W[gs])
(;B[es];W[ap]
(;B[as];W[cs]
(;B[hs];W[br];B[bs];W[br])
(;B[br];W[hs])
(;B[bs];W[br])
(;B[ds];W[bs]
(;B[br];W[hs])
(;B[hs];W[br])))
(;B[hs];W[gs]))
(;B[as];W[ap]))
(;B[ds];W[es])
(;B[as];W[ap]))
(;B[cs];W[fs]
(;B[es];W[ds])
(;B[as];W[es]))
(;B[as];W[ap])
(;B[ds];W[fs])
(;B[es];W[cs]))
(;B[js];W[is]))
(;B[cs];W[aq]
(;B[as];W[br]
(;B[bs];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[es]
(;B[bs];W[ap])
(;B[ap];W[aq]
(;B[bq];W[ap])
(;B[ap];W[bq])))
(;B[es];W[gs]
(;B[ap];W[aq])
(;B[bs];W[ap]))
(;B[ap];W[aq]
(;B[gs];W[es]
(;B[bq];W[ap])
(;B[ap];W[bq]))
(;B[es];W[gs];B[bq];W[bp])
(;B[bq];W[bp]
(;B[gs];W[es])
(;B[es];W[gs]))))
(;B[ap];W[aq]
(;B[bq];W[bp]
(;B[es];W[gs])
(;B[gs];W[es]))
(;B[ap];W[bq]
(;B[es];W[gs])
(;B[gs];W[es]))
(;B[es];W[gs];B[bq];W[bp])
(;B[gs];W[es]
(;B[bq];W[bp])
(;B[ap];W[bq])))
(;B[gs];W[es]
(;B[as];W[br]
(;B[bs];W[ap])
(;B[ap];W[aq]
(;B[bq];W[ap])
(;B[ap];W[bq])))
(;B[ap];W[aq]
(;B[bq];W[bp])
(;B[ap];W[bq])))
(;B[es];W[gs]
(;B[ap];W[aq])
(;B[as];W[br]
(;B[ap];W[aq])
(;B[bs];W[ap]))))
(;B[as];W[aq])
(;B[gs];W[aq]
(;B[cs];W[es]
(;B[as];W[br]
(;B[bs];W[ap])
(;B[ap];W[aq]
(;B[bq];W[ap])
(;B[ap];W[bq])))
(;B[ap];W[aq]
(;B[bq];W[bp])
(;B[ap];W[bq])))
(;B[es];W[cs]
(;B[ds];W[ap];B[bq];W[bp])
(;B[ap];W[aq]
(;B[bq];W[bp])
(;B[ap];W[bq]))))
(;B[is];W[aq]
(;B[cs];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[ap]
(;B[cs];W[es])
(;B[es];W[cs]))
(;B[es];W[cs];B[ds];W[ap];B[bq];W[bp])
(;B[ap];W[aq]))
(;B[ds];W[jn]C[White tenukis]
(;B[aq];W[gs]
(;B[fs];W[is]C[Nothing but ko threats for black. (Small side note: Bj1 was a better ko threat, since you get another ko threat.)])
(;B[is];W[js];B[fs];W[is]C[Nothing but ko threats for black.]))
(;B[fs];W[ap])
(;B[gs];W[ap];B[aq];W[as];B[cs];W[bq])
(;B[cs]
(;W[gs]
(;B[fs];W[es])
(;B[as];W[ap]
(;B[aq];W[fs])
(;B[br];W[fs])
(;B[fs];W[br]
(;B[is];W[hs])
(;B[aq];W[bs])
(;B[bs];W[aq];B[is];W[hs]))))
(;W[aq]
(;B[ap];W[aq])
(;B[as];W[br]
(;B[ap];W[aq])
(;B[bs];W[ap])))))
(;B[es];W[gs]
(;B[cs];W[aq]
(;B[ap];W[aq];B[bq];W[bp])
(;B[as];W[br]
(;B[ap];W[aq];B[bq];W[bp])
(;B[bs];W[ap])))
(;B[aq];W[cs]))
(;B[fs];W[ap];B[cs];W[aq])
(;B[js]))
(;B[bs];W[ar]
(;B[cs];W[aq]
(;B[gs];W[es])
(;B[as];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[es];W[gs];B[as];W[ap]))
(;B[as];W[cs])
(;B[aq];W[ap])
(;B[gs];W[cs])
(;B[es];W[cs]))
(;B[aq];W[ar]
(;B[bs];W[ap])
(;B[as];W[ap]))
(;B[ap]C[Dead in gote!])
(;B[cs];W[aq]
(;B[bs];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[ar];W[ap]
(;B[bs];W[bq]
(;B[es];W[gs])
(;B[gs];W[es]))
(;B[bq];W[as]
(;B[bs];W[ar]
(;B[es];W[gs])
(;B[gs];W[es]))
(;B[es];W[gs])
(;B[gs];W[es]))
(;B[es];W[gs]
(;B[bs];W[bq])
(;B[bq];W[bp]))
(;B[gs];W[es]
(;B[bs];W[bq])
(;B[bq];W[bp])))
(;B[es];W[gs]
(;B[bs];W[ar];B[as];W[ap])
(;B[ar];W[ap]
(;B[bs];W[bq])
(;B[bq];W[bp])))
(;B[gs];W[es]
(;B[bs];W[ar])
(;B[ar];W[ap]
(;B[bs];W[bq])
(;B[bq];W[bp]))))
(;B[gs];W[aq]
(;B[bs];W[ap]
(;B[es];W[cs])
(;B[cs];W[es]))
(;B[ar];W[bs]
(;B[cs];W[es];B[as];W[br]
(;B[bs];W[ap])
(;B[ap];W[aq]
(;B[bq];W[ap])
(;B[ap];W[bq])))
(;B[es];W[cs]
(;B[ap];W[aq]
(;B[bq];W[bp])
(;B[ap];W[bq]))
(;B[ds];W[fs])))
(;B[cs];W[es]
(;B[bs];W[ar])
(;B[ar];W[ap]
(;B[bs];W[bq])
(;B[bq];W[bp])))
(;B[es];W[cs]
(;B[bs];W[ar])
(;B[ar];W[ap]
(;B[bq];W[as])
(;B[bs];W[as]))))
(;B[fs];W[aq])
(;B[es];W[aq]
(;B[cs];W[gs]
(;B[bs];W[ar];B[as];W[ap])
(;B[ar];W[ap]
(;B[bs];W[bq])
(;B[bq];W[bp])))
(;B[gs];W[cs]
(;B[bs];W[ar])
(;B[ar];W[ap]
(;B[bq];W[as])
(;B[bs];W[as])))
(;B[bs];W[ar]
(;B[cs];W[gs];B[as];W[ap])
(;B[gs];W[cs]))
(;B[ar];W[bs]
(;B[cs];W[gs]
(;B[as];W[br]
(;B[bs];W[ap])
(;B[ap];W[aq];B[bq];W[bp]))
(;B[ap];W[aq];B[bq];W[bp]))
(;B[ap];W[aq]
(;B[cs];W[gs];B[bq];W[bp])
(;B[gs];W[cs]
(;B[bq];W[bp])
(;B[ap];W[bq])))
(;B[gs];W[cs]
(;B[ds];W[fs])
(;B[ap];W[aq]
(;B[bq];W[bp])
(;B[ap];W[bq])))))
(;B[ds];W[aq])
(;B[is]
(;W[aq]
(;B[bs];W[ar])
(;B[ar];W[bs]
(;B[cs];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[ap]
(;B[cs];W[es])
(;B[es];W[cs]))
(;B[es];W[cs];B[ds];W[ap];B[bq];W[bp])
(;B[ap];W[aq])))
(;W[js]C[This is a nice variation. Brings back memories... Muhahaha. Go ahead, make my day. :)]
(;B[ar];W[bs];B[aq];W[gs]
(;B[fs];W[cs]
(;B[ds];W[es])
(;B[is];W[ds]
(;B[es];W[ap]
(;B[as];W[cs]
(;B[bs];W[br])
(;B[br];W[hs])
(;B[ds];W[bs]
(;B[hs];W[br])
(;B[br];W[hs]))
(;B[hs];W[br]
(;B[bs];W[br])
(;B[ds];W[gs])))
(;B[hs];W[gs]))
(;B[hs];W[ap];B[es];W[gs])
(;B[as];W[ap]))
(;B[as];W[ap]))
(;B[as];W[ap])
(;B[cs];W[fs]
(;B[es];W[ds])
(;B[as];W[es]))
(;B[es];W[cs]))
(;B[bs];W[ar]
(;B[aq];W[ap])
(;B[as];W[cs])
(;B[cs];W[aq]
(;B[as];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[aq]
(;B[cs];W[es])
(;B[es];W[cs])
(;B[as];W[cs]))
(;B[es];W[gs]
(;B[cs];W[aq];B[as];W[ap])
(;B[aq];W[ap])))
(;B[gs];W[aq]
(;B[cs];W[es])
(;B[es];W[cs])
(;B[ar];W[bs]
(;B[cs];W[es])
(;B[es];W[cs]))
(;B[bs];W[ar]
(;B[cs];W[es])
(;B[es];W[cs])))
(;B[es];W[aq]
(;B[gs];W[cs])
(;B[cs];W[gs]
(;B[bs];W[ar];B[as];W[ap])
(;B[ar];W[ap]
(;B[bs];W[bq])
(;B[bq];W[bp])))
(;B[bs];W[ar])
(;B[ar];W[bs];B[cs];W[gs]
(;B[as];W[br];B[ap];W[aq];B[bq];W[ap])
(;B[ap];W[aq])))
(;B[cs];W[aq]
(;B[gs];W[es])
(;B[es];W[gs]
(;B[bs];W[ar];B[as];W[ap])
(;B[ar];W[ap]
(;B[bs];W[bq])
(;B[bq];W[bp])))
(;B[bs];W[ar]
(;B[as];W[ap]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[es])
(;B[es];W[gs];B[as];W[ap]))
(;B[ar];W[ap]
(;B[bs];W[bq]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[bq];W[bp]
(;B[gs];W[es])
(;B[es];W[gs]))
(;B[gs];W[es])
(;B[es];W[gs]
(;B[bs];W[bq])
(;B[bq];W[bp]))))))
(;B[js];W[aq]
(;B[bs];W[ar])
(;B[ar];W[bs]))
(;B[as];W[aq]
(;B[bs];W[ap]
(;B[ar];W[cs])
(;B[bq];W[ar]))
(;B[ar];W[bs])))
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