I calculate the informal Elo ratings of a small pool of players (~10-15 in number) of whom I'm a member, using a scientific calculator.

Can I do the same with the Glicko rating system, feasibly? (I'd prefer the Glicko-2 system, but even Glicko-1 would do.)


If it isn't possible, could someone name some online or offline program by which I could do that?


I've edited the question to make my implication clear: is it feasible to calculate the Glicko rating with the assistance of a scientific calculator?

  • If you have a bit of experience with computers, it shouldn't be that hard to code it yourself using, say, python python.org
    – Ant
    Dec 4 '17 at 15:55

Of course it is possible! All the functions needed for the calculations are available on a scientific calculator, e.g. square root, log, value for pi, etc.

The Wikipedia page should get you started.
Mark Glickman's page on the system should take you further.

This pdf has detailed descriptions and equations for Glicko-2 - http://www.glicko.net/glicko/glicko2.pdf.

Javascript code for implemeting Glicko-2 is available here - https://www.npmjs.com/package/glicko2.

  • Link-only answer, without any quotations, is not an answer.
    – user11153
    Dec 4 '17 at 15:41
  • 4
    @user11153, I suppose the answer to the question is "Of course", which is not behind a link. The question doesn't ask how. That's just added info behind a link.
    – Tom Bowen
    Dec 4 '17 at 15:57
  • @Tom.Bowen89 I thought this is a common sense that when someone is asking "Is X possible?" they want to know how something is possible/impossible, not just "because I said so". OP is asking if this is possible because he wants to do this, as stated in the last sentence of his question.
    – user11153
    Dec 4 '17 at 16:14
  • 3
    I think the question implictly asks "is is feasible / the effort needed not too great" not just "is it possible if in theory". Glicko is primitive enough that that using a pocket calculator should be feasible, though it'd be nice to provide an estimate for the number of calculation steps required to see how annoying it'd be. Dec 4 '17 at 17:14
  • Thanks, that's helpful! I just wanted to verify a thing: is it possible to recalculate the rating after every match (like it's done on Chess.com)? The algorithm seems to update the rating based on all the matches played during a rating period, not match by match. Dec 4 '17 at 18:48

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