4 ms·

Google's interactive doodle in celebration of Alan Turing's 100th birthday

44 points by antichaos 14y ago

nthitz 14y ago
Ok I get that it's emulating a turing machine, but can anyone explain what you are supposed to do with this?
- sp332 14y ago
  Each puzzle that you complete colors in another letter in the logo. Here's a video walkthrough: http://www.youtube.com/watch?v=84pbZSt_a9k http://www.youtube.com/watch?v=84pbZSt_a9k
- djabatt 14y ago
  I guess have fun with it.
  - TazeTSchnitzel 14y ago
    No. Solve puzzles. When you run it, it checks each number to see if it matches the expected result shown in the top-right.
antichaos 14y ago
Once you complete the six puzzles, click the bunny button to get some more challenges.
fbeeper 14y ago
Why is there a bunny?
- MitziMoto 14y ago
  Because it leads you down a rabbit hole of unproductivity.
hk_kh 14y ago
Curious about what the final-final TM does: "1 . D1 . . . . _ R D_ B2" "R U _ R D_ B2 . 1 B8 1 D_ L B2" "U . B2 . 1 R 0 U_ L B2 0 B9" Was it just spitting binary words? I am too lazy to redo the previous 12 TM again. If you get there, do not reload.
kibwen 14y ago
I found a way to get an infinite loop on one of the puzzles, but it looks like the machine halts after a fixed number of iterations. Does this mean it doesn't meet the criteria necessary to be considered a Turing machine?
- Spoom 14y ago
  I think it checks if you get far enough on one side or the other of the preprinted numbers on the tape that the numbers can no longer be seen, at which point it declares an infinite loop and restarts. Sure, technically it should keep going, but it's a game.
  - Xlythe 14y ago
    There are puzzles where it's very easy to loop it forever, while not straying from the prepreinted numbers. It's more likely just the number of iterations. Here's an example where it loops up/down. It speeds up and then "burns out": https://dl.dropbox.com/u/80052639/Screenshot%20from%202012-06-22%2014%3A38%3A03.png https://dl.dropbox.com/u/80052639/Screenshot%20from%202012-0...
bayleo 14y ago
I'm just getting a static jpg; did they take it down? http://www.google.co.nz/logos/2012/turing-doodle-static.jpg http://www.google.co.nz/logos/2012/turing-doodle-static.jpg
pbrumm 14y ago
The doodle was surprisingly enjoyable. I would love for an iphone or ipad version. Sudoku for programmers.

44 points by antichaos 14y ago

nthitz 14y ago

Ok I get that it's emulating a turing machine, but can anyone explain what you are supposed to do with this?

sp332 14y ago
Each puzzle that you complete colors in another letter in the logo. Here's a video walkthrough: http://www.youtube.com/watch?v=84pbZSt_a9k http://www.youtube.com/watch?v=84pbZSt_a9k
djabatt 14y ago
I guess have fun with it.
- TazeTSchnitzel 14y ago
  No. Solve puzzles. When you run it, it checks each number to see if it matches the expected result shown in the top-right.

antichaos 14y ago

Once you complete the six puzzles, click the bunny button to get some more challenges.

fbeeper 14y ago

Why is there a bunny?

MitziMoto 14y ago
Because it leads you down a rabbit hole of unproductivity.

hk_kh 14y ago

Curious about what the final-final TM does: "1 . D1 . . . . _ R D_ B2" "R U _ R D_ B2 . 1 B8 1 D_ L B2" "U . B2 . 1 R 0 U_ L B2 0 B9" Was it just spitting binary words? I am too lazy to redo the previous 12 TM again. If you get there, do not reload.

kibwen 14y ago

I found a way to get an infinite loop on one of the puzzles, but it looks like the machine halts after a fixed number of iterations. Does this mean it doesn't meet the criteria necessary to be considered a Turing machine?

Spoom 14y ago
I think it checks if you get far enough on one side or the other of the preprinted numbers on the tape that the numbers can no longer be seen, at which point it declares an infinite loop and restarts. Sure, technically it should keep going, but it's a game.
- Xlythe 14y ago
  There are puzzles where it's very easy to loop it forever, while not straying from the prepreinted numbers. It's more likely just the number of iterations. Here's an example where it loops up/down. It speeds up and then "burns out": https://dl.dropbox.com/u/80052639/Screenshot%20from%202012-06-22%2014%3A38%3A03.png https://dl.dropbox.com/u/80052639/Screenshot%20from%202012-0...

bayleo 14y ago

I'm just getting a static jpg; did they take it down? http://www.google.co.nz/logos/2012/turing-doodle-static.jpg http://www.google.co.nz/logos/2012/turing-doodle-static.jpg

pbrumm 14y ago

The doodle was surprisingly enjoyable. I would love for an iphone or ipad version. Sudoku for programmers.