Tsumego Hero
  • Home
  • Collections
  • Play
  • Highscore
  • Black to live. (No Ko)
    Sprint Intuition Rejuvenation Refinement
    10k (72.71%)



    hoshi911:
    I disagree with the solution using w-S2! After white S2, black answers Q1 and white should be dead! (w-S1 b-r2 or b-S1 w-r2 give no escape for white)
    d4rkm4tter:
    No, doesn't work. S2-Q1-S1-R2-T5
    27. February 2022
    14:17
    Markus:
    I disagree with the solution of ko or double-ko. Black is, in my opinion, so rock-safe alive, without any (double-)ko.
    Farkas:
    The group is unconditionally alive.
    28. August 2020
    10:20
    Ben Chaney:
    I don't see any way for black to make a double ko. White appears to be just alive.
    caranthir:
    I think I see what you mean. In my opinion it still is technically a kind of double ko, although once in every cycle, the defender has a local ko "threat" to end the double ko by capturing at C2. I write "threat" in quotation marks, because a thing living in a double ko is quite alive anyway.
    3. July 2020
    04:31
    flemenga:
    People are saying it is Alive in double ko... the only way I can see this is if you mean it is alive in *sente* with double ko. Otherwise, it seems to be totally alive in gote to me. I’m only 13kyu so still not sure if that is the way people normally refer to the life or death of a group.
    caranthir:
    Totally accurate would be to say that the life and death is unsettled, and the defender can live (in double ko). Being alive in sente or gote, for that matter, would refer to the situation at the end of the move or sequence that has been played to settle the life and death. If the defender lived "in sente", the opponent would even be forced to defend themselves locally in some way after the sequence to live - unless globally somewhere else on the board there was even more value.
    26. June 2020
    19:06
    Silveryu:
    For anyone wondering, it's actually alive in double Ko, https://senseis.xmp.net/?DoubleKo
    d4rkm4tter:
    thanks
    21. May 2020
    18:51
    Jonatan:
    Description says 'no ko', but solution is ko. Tsumego Dictionary Volume I 95/200 Black to live. (No Ko)
    Admin:
    I disagree with your comment.
    24. July 2019
    08:01
    Jametto:
    This solution finish in ko
    Admin:
    I disagree with your comment.
    1. June 2019
    08:18