A last esthetic suggestion: let's mark the lower group and label with
1 the last move Black did in the ko:
https://drive.google.com/file/d/1L62m7i_IJX8FCB_8rIOwjYK3tR1GZZaq/view?usp=sharing
On 23 June 2018 at 00:19, Marcel Crasmaru wrote:
> Well all my reasoning was good but for the formula whic
Well all my reasoning was good but for the formula which is actually
F = z || (y && x) :-)
Mea culpa I didn't see that the ladder choices are reversed. I let
other people try showing that the group is alive in John's initial
problem (last move was B capture at x, the lower side ko).
OK I think there is one thing to be done to make the solution longer:
1. mark the middle ko and then
2. problem should be: B just captured in the middle ko and W is to
move - is the group alive?
See here:
https://drive.google.com/file/d/1J5Xn4XkOqSsYx0AEBQJj6EL-SjNqNq-o/view?usp=sharing
Assumi
Errata: assuming x is the top ko then the formula encoded by this problem is
z && (y || x)
with x = 1, y = 0, z = 0 and W cannot play at z. Thus W is already
dead you cannot make the formula true.
--Marcel
On 22 June 2018 at 22:19, Marcel Crasmaru wrote:
> The position looks OK is great - I
The position looks OK is great - I didn't find any side solutions.
Just one observation: I think this encodes x && y || y || z and W is
dead already thus is arguably a easier problem :)
Should make for a great wall poster.
On 22 June 2018 at 19:48, John Tromp wrote:
> at the bottom of my
at the bottom of my Go page http://tromp.github.io/go.html, which also
contains an sgf link.
Direct link to image: http://tromp.github.io/img/WO5lives.png
Enlarging the board to 29x29 allows for a much better final (I hope)
look, close to my first attempt.
-John
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On 2018-06-22 at 09:07, "Ingo Althöfer" <3-hirn-ver...@gmx.de> wrote with
subject “[Computer-go] thumbs crossed ?! [offtopic]”:
>>> I think you meant "cross my fingers". 🙂
>
> yes that is the American way to formulate is.
> Our Chancellor, however, prefers "thumbs pressed".
Not only Mrs. Merk
> The hunt for the simplest possible ko gadget continues...
Latest attempt at the usual place:
>>> at the bottom of my Go page http://tromp.github.io/go.html, which also
>>> contains an sgf link.
>>> Direct link to image: http://tromp.github.io/img/WO5lives.png
Unfortunately not as pretty as the
> Hopefully fixed now.
Nope. Still no good. White can play O13, M11, or Q11 instead of recapturing ko.
The hunt for the simplest possible ko gadget continues...
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> I assume after white plays at U22
This fails the goal of saving White O5, as Black will just P5, and
White's only means of escape,
with the ladder M3 N4 N5 M5 M6, fails when Black directs it to N17.
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Hello,
I assume after white plays at U22, black T20, white T19, black should
have a choice of playing either at S21, capturing one white stone and
leading the ladder to the top ko, or at S20, leading the ladder to the
middle ko.
However, if black plays at S21, the sequence:
wS20 bT21 wR20 bS22 wS
Hello,
I assume after white pla
2018-06-22 0:27 UTC+02:00, John Tromp :
Direct link to image: http://tromp.github.io/img/WO5lives.png
>
> Might be useful for go event organizers in need of arrow signs...
>
> regards,
> -John
> ___
> Computer-go mai
> I also think that what makes real go that hard is ko, but you've shown that
> it's
> equivalent to ladder, which frankly baffles me. I'd love to understand that.
Just different definitions of "hard"? Ko is still way harder (more
confusing, harder to discover a winning move when one exists) tha
Hi Richard,
>> I think you meant "cross my fingers". 🙂
yes that is the American way to formulate is.
Our Chancellor, however, prefers "thumbs pressed".
Look here:
https://www.bz-berlin.de/data/uploads/2014/07/merkel_1404473813-768x432.jpg
In the photo, look at the single white Go stone
and th
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