A modification to the rating system encourages sportsmanship by disregarding goal margins in excess of 10. A team favored by more than 10 goals need only win by 10 without suffering any loss to its power ratings. Likewise, a team that is an underdog by more than 10 goals will not improve its rating when an opponent achieves the 10-goal limit.

Below is an explanation of the TGL, but be advised that this concept is not easily explained. The important thing to know is that if a team defeats another team by a margin greater than ten, their rating will be no greater than if that had won by only ten.

If Team A is predicted to win by 15 goals, it need only win by 10 goals and no loss or gain is achieved by either opponent. Any loss in power points by the victor in 'underperforming' will be made up by compensating that team in the TGL adjustment as shown on the Computer Ratings page. Likewise, any gain in rating points made by the loser who played above its expectation (lost by 10 instead of 15 goals) will lose power rating points, compensating for the gain in the TGL adjustment as shown on the Computer Rating page. If Team A wins by more than 10 goals, it will not realize any benefit to its power rating. The actual adjustment is determined by the "error" shown on each team's analysis page, where the error is indicated by the above (+) or below (-) performance for that game.

The net effect of a mismatch, where a team is favored by more than 10 goals and wins by at least that margin is to not count the game at all in developing a rating for either team, as these results do not provide useful information to the formula in any case. If, on the other hand, an underdog by more than 10 goals holds the favorite to fewer than 10 goals, then the favorite will lose rating points and the underdog will gain rating points. In effect, the favorite has everything to lose but nothing to gain, and the underdog has everything to gain and nothing to lose when there is a predicted goal margin in excess of 10.

Let's go through a few examples:

Team A is favored by 20 goals over Team B

(a) Team A wins by 10 goals
(b) Team A wins by 24 goals
(c) Team A wins by 4 goals

For cases (a) and (b), the game will have no effect on either team's rating. For case (c), Team A will lose rating points, and Team B will gain rating points.

Team A is favored by 6 goals over Team B

(a) Team A wins by 10 goals
(b) Team A wins by 24 goals
(c) Team A wins by 4 goals
(d) Team A wins by 8 goals
(e) Team A loses by 3 goals

For cases (a) and (b), Team A will beat its expected performance by up to, but no more than, 4 goals. Both cases (a) and (b) produce the same result on the power ratings. For cases (c), (d) and (e), the 10-goal rule does not apply.

Team A is favored by 2 goals over Team B

(a) Team A wins by 10 goals
(b) Team A wins by 24 goals
(c) Team A wins by 4 goals
(d) Team A wins by 8 goals
(e) Team A loses by 3 goals

For case (a), Team A will gain significant points, and Team B will lose an equal amount. For case (b), Team A will gain the same amount as in (a), and team B will lose an equal amount. For cases (c), (d) and (e), the 10-goal rule does not apply.

If a team is favored to win the game but loses by more than 10 goals, then it will suffer significantly, but it will be limited to a 10-goal loss.

Let's take an example of a case where team A is favored to win over team B by 4 goals but actually wins by 12 (i.e., 18-6). The team will get credit for winning by 10 goals and not 12, so the 8-goal difference must be reduced to 6, and the TGL correction is -2.0. If team A was expected to win by 10 or more goals over team B, then the TGL correction would be exactly equal to the -(Err-L) for that game. When a team is favored to win by less than 10 goals and wins by 10 or more, then they get to keep part of the 'Err-L' up to 10 goals.


In summary, no power rating gain is achieved when winning by more than 10 goals.

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