Star Rating (a.k.a. batting/bowling ability) explained....in detailSir Kashyap (Army Ants)
106 months ago
This seems to be a bit of a black box to a lot of users, so thought I would explain further. Understanding this is important for users to spot weaknesses in a batsman and strategize accordingly.
# For batsmen
'Skill' (Batting vs seam/spin), 'Fitness', 'Form' and 'Experience' determine the Batting Ability for a player.
Consider a player 'Ramu Ramlal' having these skills
Accomplished Experience, Decent Form and Unreliable Fitness.
Batting vs Seam bowlers
Batting vs Spin bowlers
As you can see, he is quite good against spinners but relatively weak against seamers. The Hitwicket Suresh Raina, you can say.
Now before the match, the match engine calculates his batting ability against both type of bowlers.
Batting ability against spinners (Bspin) = SomeComplexFunction(Batting vs spin bowlers, Experience, Form, Fitness)
Batting ability against seamers (Bseam) = SomeComplexFunction(Batting vs seam bowlers, Experience, Form, Fitness)
Keep in mind the Star Rating is the avg value of his batting ability against each delivery.
Case #1, during the match Ramu Ramlal faces 'x' balls, all from spinners.
Ramu's Star Rating = (x * Bspin) / x
Case #2, during the match Ramu Ramlal faces 'y' balls, all from seamers.
Ramu's Star Rating = (y * Bseam) /y
Case #3, during the match Ramu Ramlal faces 'x' balls from seamers and 'y' balls from spinner
Ramu's Star Rating = ((x * Bseam) + (y * Bspin)) / (x+y)
- Therefore, if Ramu were to face only spinners in his innings, owing to his superior spin batting skills, his star rating will be much higher than it would be if he faces only seam bowlers.
- Apart from the bowling style (spinner/seam), his star rating is not effected in any way by the ability of the bowler he faces. good bowler, bad bowler...no difference.
Update (Rule change 16/2/2014)
- Sporting, Green or Crumbling wickets do not increase or reduce the star rating of batsmen. A Flat wicket increases the star rating of batsmen.
Sorry the engineer in me makes me talk in formulas, let me know if any more clarification is needed. If ppl are able to understand this, then I'l make a similar post for bowler rating too tom.
suggestions to improve the description in manual based on the above stated facts are welcome. We don't want every user to read all this to understand how it works, thats no fun :)