Hi Adrian,

Take a handful of black and white stones, throw them on a 9x9 board and check how many times you need to repeat this before you have a legal position :) Please report your results in case you actually proceed with this experiment.

best regards,
Jan van der Steen

On 22-01-16 16:57, Adrian Petrescu wrote:
Very cool! I find it interesting that the number is only about 1.2% of
3^361 (though I realize 3^361 doesn't take symmetries into account). On
the surface it's counterintuitive to me that nearly 99% of random stone
configurations are not legal Go positions!

On Fri, Jan 22, 2016 at 10:50 AM, Xavier Combelle
<[email protected] <mailto:[email protected]>> wrote:

    well done !

    2016-01-22 5:18 GMT+01:00 John Tromp <[email protected]
    <mailto:[email protected]>>:

        It's been a long journey, and now it's finally complete!

        http://tromp.github.io/go/legal.html

        has all the juicy details...

        regards,
        -John
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