Has anyone done the GCHQ puzzle yet? The grid & constraints are at http://www.bbc.com/news/uk-35058761 I noticed one row was completely specified by the information supplied. Rich
On 15 Dec 2015 at 17:08, rcs@xmission.com wrote:
Has anyone done the GCHQ puzzle yet?
I've just started on it...
The grid & constraints are at
http://www.bbc.com/news/uk-35058761
I noticed one row was completely specified by the information supplied.
There are at least three rows completely specified [all I've found so far]. There are many that are very close to completely specified [and so there are only a few squares of freedom across the row. /Bernie\ -- Bernie Cosell Fantasy Farm Fibers mailto:bernie@fantasyfarm.com Pearisburg, VA --> Too many people, too few sheep <--
Rich Schroeppel wrote:
Has anyone done the GCHQ puzzle yet? The grid & constraints are at
The grid puzzle is a fairly easy one of its kind. It leads to other puzzles that are trickier, or at least tricky in a different way. The ones I've seen aren't very mathematical. -- g
It’s a QR code. I wrote an iterative solver in Mma that gets a solution in about 10 iterations starting from a random 25x25 grid. I didn’t include the given black squares as constraints, but a fair fraction of the solutions are consistent with those constraints. -Veit
On Dec 15, 2015, at 7:08 PM, rcs@xmission.com wrote:
Has anyone done the GCHQ puzzle yet? The grid & constraints are at
http://www.bbc.com/news/uk-35058761
I noticed one row was completely specified by the information supplied.
Rich
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I have two questions about this type of puzzle: 1) Does it have a name? 2) Are there heuristics for designing puzzles that are very hard? -Veit
On Dec 15, 2015, at 7:08 PM, rcs@xmission.com wrote:
Has anyone done the GCHQ puzzle yet? The grid & constraints are at
http://www.bbc.com/news/uk-35058761
I noticed one row was completely specified by the information supplied.
Rich
1) Paint by Numbers, and Nonogram 2) Can't answer this. I believe most are computer generated, without regard for difficulty. Nick On 1/10/2016 10:41 AM, Veit Elser wrote:
I have two questions about this type of puzzle:
1) Does it have a name?
2) Are there heuristics for designing puzzles that are very hard?
-Veit
On Dec 15, 2015, at 7:08 PM, rcs@xmission.com wrote:
Has anyone done the GCHQ puzzle yet? The grid & constraints are at
http://www.bbc.com/news/uk-35058761
I noticed one row was completely specified by the information supplied.
Rich
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
participants (5)
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Bernie Cosell -
Gareth McCaughan -
Nick Baxter -
rcs＠xmission.com -
Veit Elser