It struck me this morning while watching RS’s after one match that it should be somewhat possible to recover penalty counts for the losing side in the first n matches given every team’s RS after those n matches at a regional with n teams. Since a team’s RS is dependent on the pre-penalty losing alliance’s score, it therefore contains information about penalties that we can extract by being clever.

Given a team that:

-won games that had reported losing scores of a, b, c, and d

-lost games with reported losing scores of e, f, g, and h

-an unknown penalty vector **p**, with elements p[sub]a[/sub], p[sub]b[/sub], p[sub]c[/sub], p[sub]d[/sub]… representing how many points were deducted in penalties.

Then this team’s RS can be written as:

RS = ((a+p[sub]a[/sub]) + (b+p[sub]b[/sub]) + (c+p[sub]c[/sub]) + (d+p[sub]d[/sub]) + e + f + g + h)/[matches played = 8 in this case]

MatchesPlayed*RS - a - b - c - d - e - f - g - h = p[sub]a[/sub]+ p[sub]b[/sub]+ p[sub]c[/sub]+ p[sub]d[/sub]

We can do this for every team, and we end up with a bunch of equations with the form

(MatchesPlayed*RS minus losing scores) = sum of unknown penalty scores

We can write these into a matrix, solve it for the **p** vector, and thus derive the penalty point counts. The cell in the ith column and jth row is 1 if team j participated in and won the i’th match, 0 if they did not. The constant vector’s j’th row is ([number of matches the team played]*RS - sum of losing scores in their games). Matrix height is how many teams there are, matrix width is how many matches you’re using.

I don’t have time to implement this (as a student, I actually do have studying to do), but I thought I’d put it out there for people that might want to try it.

Limitations I can think of:

-I don’t think it’d be solveable once the number of matches exceeds the number of teams, though if you grabbed every team’s RS data at the half-way point you could probably use that data to extract penalty counts for the losing side in every match

-Only works for the losing side, I don’t think there is any information about the winning side encoded in match scores or team rankings

-If there are matches that end with 0 points, the potential number of penalties is infinite, and will probably ruin the matrix. Fortunately, there have been no such matches on Galileo so far.