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About SumoLyubo

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  1. SumoLyubo

    Bright colored mawashi, Ura among them...

    Sentoryu chose his shikona because it sounded like his hometown of St. Louis, no?
  2. SumoLyubo

    The English commentators- views

    I actually wondered for a long time if they had an explicit policy that they must define each term a certain number of times per day or per tournament. Not that I minded -- it worked to get me hooked on sumo.
  3. SumoLyubo

    Top 10 Sumo Records Natsu 2021

    Ryuden had a top rank in Juryo at the time he fell down the ranks and only made his top-division debut later.
  4. SumoLyubo

    Hiro Morita Basho Review and opinions

    American film (indeed, with part of the drama centering on short cons vs long cons), also an adaptation of a novel. I very much enjoyed it.
  5. SumoLyubo

    Natsu basho 2021

    That was my reaction too...
  6. SumoLyubo

    March basho 2021

    That was a scary-looking tachiai; I'm amazed Terunofuji stayed on his feet. An amazing finish for him--3 for 3 ozeki matches.
  7. SumoLyubo

    March basho 2021

    "No yusho, no kanto-sho, nothing for Takayasu" -- well said by Hiro, but a little cruel
  8. SumoLyubo

    March basho 2021

    Never guessed that the Terunofuji-Takakeisho match would be so important for the yusho, but am glad that the last day is going to be so exciting
  9. SumoLyubo

    2021 "Kozumo" Hatsu Basho discussion thread

    Yeah they had a different angle in the replay. Probably okay.
  10. SumoLyubo

    2021 "Kozumo" Hatsu Basho discussion thread

    Did anyone else think Hokutofuji didn't have one of his hands down at the tachiai? Frustrating how that's occasionally not enforced.
  11. SumoLyubo

    Theoretical Sumo Tournaments

    Yeah, I'm digging through my old AI textbooks to figure out what would be a good approach. I had not thought about an expert system but that seems very promising.
  12. SumoLyubo

    Theoretical Sumo Tournaments

    I've lurked the Sumo Forum for a while, but now I've found occasion to post. I spent some of my free time last week encoding sumo tournament scheduling as an integer linear programming (ILP) problem, largely as an excuse to play around with an ILP solver but also out of curiosity for figuring out certain theoretical possibilities for sumo tournaments, such as the lowest possible winning score without a tie, the largest possible tie, etc. I have posted my silly tool and written up some results here. Many of these bounds are, in retrospect, not too hard to figure out by hand: For example, if there are 315 total wins in a tournament, then there can be at most 315/8 = 39.375 (round down to 39) top-division wrestlers with a winning score, etc. Nevertheless, it is not obvious (at least to me) how to go from verifying one of these bounds to producing a specific tournament that fulfills those criteria. Note that the tool is pretty slow, so it's probably not a practical way to explore possible sumo tournaments. I am curious as to whether others have worked these out on paper before and whether there are more results of this vein that I never considered. I am really bad with combinatorics, so I am also curious as to whether some of the problems I've stated are instances of "canonical problems" that I'm simply unaware of. This was just a feverish first pass at the scheduling problem (also I don't have much prior experience with ILP solvers so I may just be encoding it badly), so I am also interested in extending or improving this solver. One thing I am curious about is whether trying to encode the typical scheduling customs (yokozuna and ozeki facing the komusubi and top maegashira in week 1 and then the sekiwake and each other in week 2, etc) might actually improve the performance of the solver, as it may reduce the search space. I would be curious if there are neat formulations of these rules I could try passing to the solver, either as hard constraints ("a yokozuna will never face M17E unless they're tied for the lead," etc) or soft ones ("minimize the distance in rank between the fighters in each bout"), that also seem realistic. Another problem I would like to consider is sampling likely tournaments (schedules and outcomes), but I haven't worked out how to do it. A practical application of such a tool would be if one could judge the probability of a particular tournament as it unfolds. I'm curious if others have written up tools like that, as I'm sure someone's tried before.