[Problem] Black to play and… get a pae for mutual life

Update: the 2d in question who played this game with The Kibitzer informed me that some key information is missing… The stones to the left that I didn’t capture in my snapshot of the position are relevant, as the crux is that J1 and K2 would be seonsu [선수; sente]… I’ll admit that I have no clue what that entails, but there you have it… A DDK should not be trusted to take a picture of a local position on a board :p

test
Black to play… and barely save his stones

This problem was happened on the same day as the other one I posted a few days ago. This wasn’t in my game, but a game between The Kibitzer 3d and a 2d… At the review, we spent probably 40 minutes or so on this particular position. The question was whether Black could save the marked stones or not… In this particular case, we ended up spending a lot of time looking at the possibilities after White plays A.

If White doesn’t play A, and plays somewhere else, life should be possible (I think); yet the question whether life for Black  is possible after A is a debate that went way over my head – I know I’m kinda short, but still, that was some high flying baduk… After variation after variation after variation, the semi-conclusion was reached that Black could force a pae [패; ko] for mutual life… I have no clue how, as the variations went too fast for me, but in the end The Kibitzer said he’d stake his rank as a 3d on it – which prompted his opponent to remark that ad hoc demotions on the ranking system are possible… In the diagram above I didn’t include the rest of the board, as it should be possible locally…

So… Anyone want to try bump The Kibitzer down to 1d? Black to play and force a pae for mutual life

P.S.: I actually managed to make the Black stones live! After which the two dan players remarked, with smirks on their faces, that my solution was based on White making a dumb mistake.

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4 thoughts on “[Problem] Black to play and… get a pae for mutual life”

  1. HeJin, some critical information is missing. The crux of the ko seki was that both J1 and K2 were sente. Without that there’s no chance of life. So the stones to the left of the shown position are needed.

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