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Jonathan_Blow's profile
Jonathan Blow
Jonathan Blow
Jonathan Blow
@Jonathan_Blow

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Jonathan Blow

@Jonathan_Blow

Game designer of Braid and The Witness. Partner in IndieFund.

San Francisco
the-witness.net/news
Joined January 2010

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    1. Jonathan Blow‏ @Jonathan_Blow Jul 29
      • Report Tweet

      This seems like it would be a fun competition, for those who don’t have way too much work to do already ... !! http://azspcs.com/Contest/Nearness …

      2 replies 4 retweets 31 likes
    2. Tom Forsyth‏ @tom_forsyth Jul 29
      • Report Tweet
      Replying to @Jonathan_Blow

      This feels very similar to functions that choose pseudo-random sampling orders for progressively raytracing shadows etc.

      1 reply 0 retweets 1 like
    3. Jonathan Blow‏ @Jonathan_Blow Jul 29
      • Report Tweet
      Replying to @tom_forsyth

      I think the only flaw is, the competition is based on a fixed number of input problems, and you submit the output results, which means it's a battle over long-term search space. Would be better if "we run your program on N random examples, it has K seconds to output each result."

      1 reply 0 retweets 6 likes
    4. Jonas Bötel‏ @CodeLumpN Jul 29
      • Report Tweet
      Replying to @Jonathan_Blow @tom_forsyth

      If the grid size is bounded at 30x30 all random examples are just relabelings of the canonical labeling. The best solution can be precomputed and mapped to the relabeling.

      1 reply 0 retweets 0 likes
    5. Jonathan Blow‏ @Jonathan_Blow Jul 29
      • Report Tweet
      Replying to @CodeLumpN @tom_forsyth

      Given that there are 900! possibilities, I think the point is that the search space is way too large to precompute exhaustively.

      2 replies 0 retweets 0 likes
    6. Nathan SculptrVR‏ @SculptrVR Jul 29
      • Report Tweet
      Replying to @Jonathan_Blow @CodeLumpN @tom_forsyth

      I think what he meant is that the program you submit really could just have memorized solutions since you know the max grid size is 30.

      1 reply 0 retweets 1 like
    7. Nathan SculptrVR‏ @SculptrVR Jul 29
      • Report Tweet
      Replying to @SculptrVR @Jonathan_Blow and

      (even though that memorized solution would probably be sub-optimal)

      1 reply 0 retweets 0 likes
      Jonathan Blow‏ @Jonathan_Blow Jul 29
      • Report Tweet
      Replying to @SculptrVR @CodeLumpN @tom_forsyth

      Oh, I see. Hmmm. Yeah the problem would have to be modified further.

      8:11 PM - 29 Jul 2019
      • 2 Likes
      • Jonas Bötel Nathan SculptrVR
      1 reply 0 retweets 2 likes
        1. New conversation
        1. Nathan SculptrVR‏ @SculptrVR Jul 29
          • Report Tweet
          Replying to @Jonathan_Blow @CodeLumpN @tom_forsyth

          I agree it would be more interesting to make it a speed game, though. As it stands, someone with free college supercomputer credits might just run 1000 CPU-days of brute force for the win.

          1 reply 0 retweets 0 likes
        2. Jonas Bötel‏ @CodeLumpN Jul 30
          • Report Tweet
          Replying to @SculptrVR @Jonathan_Blow @tom_forsyth

          I am not even convinced yet that the problem space has local minima. If I did pairwise swaps as long as each of them decreases the score, would I get stuck in a suboptimal solution?

          1 reply 0 retweets 1 like
        3. Nathan SculptrVR‏ @SculptrVR Jul 30
          • Report Tweet
          Replying to @CodeLumpN @Jonathan_Blow @tom_forsyth

          My thinking is scramble the board and then do greedy pairwise swaps until you stop getting gains. Repeat for a few days and submit the best result. I thiiink you'll get stuck in local minima, but I'm not 100% sure.

          0 replies 0 retweets 0 likes
          4. End of conversation

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