Tsumego Hero
  • Sign In
    		•
    Black to live. (best ko)
    		Sprint Intuition Rejuvenation Refinement
    2k (1941)
    Upgrade to Premium
  • 1045



    • kovarex:
    I changed this problem to status based and marked T2 as incorrect, as it is a ko, which is clearly worse than being unconditionally alive.
    posetcay:
    Changed the hint to make it clearer.
    		21. March 2024
    17:40
    CosmicHawk:
    When set up in the top left, A18 also leads to a ko : B18 B19 This ko when resolved lose only 1 point compared to the optimal solution when the ko is also resolved I believe it could still be considered correct since it lived through a ko and both ko have is at the opponent adv.
    Ivan Detkov:
    Your move has been added.
    		16. September 2022
    19:13
    ogee:
    2nd move, resisting seems wrong. Instead below sequence seems to create ko. I feel this is the best answer for both. B2-B3-C3-A2-A1-A3-C2-A2
    caranthir:
    I agree. I changed sequences and the description.
    		29. May 2021
    07:34
    Andrey:
    nyoshi, if A2 - B2 B3 B1 dead, B1 A1 ko.
    caranthir:
    Resolved.
    		25. December 2019
    15:44
    nyoshi:
    why isn't A2 a good answer?
    caranthir:
    Resolved.
    		28. November 2019
    15:12
    searching...