Tsumego Hero
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    Sprint Intuition Rejuvenation Refinement
    4d (21.11%)
    File by Omicron



    RobinB:
    You cannot kill without a ko : the answer to the first move in the "real" solution is wrong. If the answer is hane and not nobi, then the only way to kill is a ko.
    Ivan Detkov:
    You are right. It was resolved.
    31. May 2022
    07:23
    RobinB:
    I proposed this problem to my Go Club and someone came with a solution that I didn't expect : white can actually obtain a ko when black plays the first good move. The sequence is a bit long so here is a sgf with it (it's AI approved).
    Ivan Detkov:
    The real solution is to kill without ko. This is sub-optimal.
    29. May 2022
    15:41
    RobinB:
    SGF
    29. May 2022
    15:41