De/Total Skill Index
Der Total Skill Index (oder TSI ist ein offizielles Maß für die Fähigkeiten eines Spielers. Die Formel für die Berechnung ist unbekannt, aber es wurden einige halbwegs erfolgreiche Versuche unternommen um sie annähernd nachzubilden. Es ist ein Gerücht im Umlauf, nach dem HT-Bjorn die Formel ändert, sobald jemand zu nah an der Lösung dran ist.
Generel gilt - je höher der Wert, destso besser der Spieler. Aber wie immer kann man das nicht so pauschal sagen. Ein Spieler mit guten ausgeglichenen Werten in Verteidigung, Passspiel, and scoring
As a general rule, the higher the TSI, the better the player. However, there are problems with this theory. A player who is average in several skills (e.g. inadequate in defending, passing, and scoring, but with excellent stamina) will often have a higher TSI than a more specialized player (e.g. excellent defending, but everything else poor or lower). TSI also increases with training and it can also increase and decrease with form. Sometimes, TSI will drop even though form does not. This is an easy way of spotting that a background form change has occurred, and the form sub-level has decreased.
TSI for goalkeepers is a different matter. The higher TSI for a keeper, the better. Since a keeper only specializes in one skill, goalkeeping skill can be measured quite accurately based on their TSI and form (e.g. using http://www.hottrick.org/hattrick_keeper_tool.php).
Interestingly, goalkeepers typically have higher TSI at the same skill level than outfield players. A common theory is that both form and stamina have a multiplying effect on the TSI, whereas the other skills (for keepers, goaltending only) contribute as a sum of exponential functions.
Set Pieces and experience do not affect the TSI.
TSI approximation
For Goalkeepers an approximated formula for TSI calculation is:
TSI = [(0.025f+0.1)[10(s-1)]^(3.4)]/100
With f = Form and s = Skill (1 = disastrous, 2 = wretched, etc.)
