The Tournament Director Forums
Main => General Discussion => Topic started by: jeff b on November 22, 2008, 01:53:18 PM
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Can someone please explain the relationship between Points for Playing, Tournament Score and Overall Score? I set up a points for playing formula for our league and so far we've played one tournament and everything seems fine just using the points for playing. I can see our standings and the points work as I had intended, and the overall score is ranked the same but the numbers are much different. What am I missing?
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The way I understand it to work, "Overall score" and "Tournament score", when used in default settings (unchanged), basically formulates everything into a score that bases on average finishing position. That's probably why you see a change. If you have played only one tournament (which now I see on your post that you have, sorry), then this shouldn't change unless you have hits/rebuys/add-ons incorporated somehow. I use my overall, or "Rock" score as i call it, to determine the best consistent player. Also, it turns out, I found that it worked out as a tie-breaker for our Player of the Year (we use Points for determining that). 2 of us finished with the same number of events played and the exact same points total. The overall score broke the tie (one player had 4 wins, the other one had 2, and on paper, that person with 4 wins had a higher average finishing spot than the other player). So that's how I use it. Everyone, feel free to correct me if I am wrong, as I suspect I am not 100% sure this is exactly right.
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The "Points for Playing" formula allows you to award points to players in your tournament based on a formula. The formula is saved as part of the tournament, so the method (formula) can be unique for each tournament.
The "Tournament Scoring" formula provides a way to use a consistent (single) formula to rank players across a series of tournaments, without having to enter that formula for each tournament. You can change this formula and re-run stats and presto: new scores for every player in every tournament on which you've run stats. This is completely independent of "Points for Playing".
The "Overall Scoring" formula is just a way for you to combine the "Tournament Scoring" results for a player into a single value. Since the "Tournament Scoring" formula produces a value for each tournament, you can then use the "Overall Scoring" formula to, say, add up those values and average them.
The default formulas for "Tournament Scoring" and "Overall Scoring" attempt to score players based on their finishing ranks and number of tournaments in which they've participated. They don't look at a player's "Points", only their finishing rank, so yes, they would most likely look very different from your players' final "Points".
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Ok, cool, that makes sense. We do have some players who play with us but aren't participating in our league, and therefore get 0 points. I'll still be using the same points formula for all our tournaments but the scoring could come in handy for ranking everyone who plays with us.
I see that the default tournament score formula results in a pretty gradual increase from bottom to top. The one we implemented for our league is a modified version of sqrt(n)/sqrt(r), with multipliers built in so as to result in a number of chips each player will get in our championship tournament. That one produces a much steeper curve the higher you finish in the tournament. Anyone have any thoughts on what each type of formula shows? That is, would one or the other more accurately reflect each player's performance over several months or a year? I'd like to incorporate a few other factors, such as knockouts, earnings, etc. - I assume all the same functions and operators work in the scoring formulas as in the points formulas?
Thanks.
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I assume all the same functions and operators work in the scoring formulas as in the points formulas?
The "Tournament Scoring" formula has all the same variables available to it as the "Points for Playing" formula - with the addition of the "points" variable, which represents the points a player earned for the tournament.
The "Overall Scoring" formula has only the variables: "scores", "numberOfScores" or "s", and "numberOfTournaments" or "n".
The same set of functions, such as "floor()", "if()", and "pow()", are always available to all functions. Functions that take a list of values, such as "sum()" and "average()", are available to all formulas, but really only have relevance in the "Overall Scoring" formula, since the "scores" variable is a list of values.
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Ok, now that all of this makes sense, I'm wondering what people think of the log-based scoring such as the default tournament score, vs. a formula like sqrt(n)/sqrt(r). I've gone back and cleaned up the tournament files I had saved since I got the software last January, getting rid of the incomplete ones and such. I basically kept the default tournament score, and for the overall score I modified it to drop the highest and lowest score for each person, essentially setting a minimum of 3 played. It was pretty interesting to see who ranked where.
But as far as comparing the point results of our current league season (only 3 tourneys to date) which is a variation of the sqrt(n)/sqrt(r) formula, the weighing of the points toward the top seems pretty similar. Anyone have a broader basis for comparison of the two methods?