10 thoughts on “Black to play”

  1. Long time no play. Hmm. I think I’ve got it.

    Black F, it’s the crucial place to form two eyes. White E would threaten to connect at A, but can be countered with D. The freedom above D is crucial to black’s survival.

    Playing E would have white press down at A and A’, which need to be countered by B and B’, respectively; then A takes F and Black dies.

    [Yes. And in a certain meta-way, its obvious: no other play is sufficiently counter-intuitive to be an interesting answer. I realised it eventually when I found, in all the other sequences, that white kept playing at “f” -W]


  2. OT – other fun.

    With AMSR down, what is now your favourite map/graph?

    [Ah, is that it? I’d noticed that IJIS wasn’t updated, but hadn’t been paying attention to why. I’ll need to think about that -W]

    There is quite a collection at



    is probably most similar to IJIS/JAXA one.

    There is a pool for the maximum at

    with my brief, but probably useless, pointers.


  3. AMSR2 is due for launch in a few days, but aneone got any ideas how long before information becomes available? Dr Spencer said they wanted a year of overlap between AMSR-E and AMSR2 so I am doubting calibration phase will be quick.

    News of end of AMSR-E was in update to

    The graph page does say “Sea-ice data update stops for a while due to the suspension of AMSR-E observation.” and graph even had an AMSR-E heading.

    [Interesting. Hopefully something obvious will be in place before the Spring for the bets. Either that, or the answer becomes obvious -W]


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