Tsumego Hero
  • Sprint Intuition Rejuvenation Refinement
    2d (2219)

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    kovarex:
    Added this as an alternative correct move.
    14. November 2023
    16:48
    Ivan Detkov:
    Added an alternative solution.
    posetcay:
    Which solutions did you add? F17 and G18 were marked correct even though they don't work, so I marked them as wrong and added refutations.
    3. August 2023
    00:43
    posetcay:
    For some reason review mode is broken for this one. In review mode white plays first, but when I play the tsumego normally black goes first when it is black to play.
    posetcay:
    Resolved.
    15. July 2023
    22:02
    Lyde:
    (Top) F17 variation ends in KO but is accepted... G18 White can respond with G19, KO again. So, F19 should be the only solution I think?
    posetcay:
    Marked ko solutions as wrong.
    13. July 2023
    13:28
    posetcay:
    I fixed the problem as best as I could, it is solvable now.
    d4rkm4tter:
    Ok, nice. You made it solvable by removing the exchanges in the corner. Inverting colors is another approach that I also made 2-3 times in the Cho Chikun Intermediate collection.
    28. June 2023
    15:44
    posetcay:
    @jhubert I disagree, N2-O1 and it is still impossible to live for black. If you check the problem in the link kovarex provided, that is what the problem is supposed to look like.
    kovarex:
    Anyway, if we agree that the problem is broken, we should decide how to fix it. In similar situations in my weiqi collection, what I did was to simply invert colors, add the first move, and change the problem as white to kill.
    25. June 2023
    14:14
    kovarex:
    And the position in this problem actually appears in the variation tree as the incorrect solution, and is marked as not solvable.
    jhubert:
    What the problem corrected as it has now a solution.
    24. June 2023
    22:50
    kovarex:
    Interesting, it is almost identical shape as this problem I was adding. https://tsumego-hero.com/tsumegos/play/24716?orientation=bottom But the crucial difference is, that in the linked problem, the corner exchange is still open, and the solver has 2 ways to threat to live in the corner, and has to use one way or another based on the way the second move is answered. But here, the corner sequence was already done before the asking move, so the opponent can just select the move that works.
    24. June 2023
    22:48
    ola:
    I agree.
    21. June 2023
    21:00
    posetcay:
    This problem has no solution. G18-F19 dead.
    31. May 2023
    08:39
    searching...