How a pool skill rating works (and why yours moves)
A skill rating is a single number that estimates how well you play, derived from results against drills whose difficulty is also known as a number.
The idea is borrowed from chess and it works for the same reason: what a result tells you depends entirely on what you were up against.
Both sides are rated
Every drill carries a rating, and so do you. When you attempt a drill, the difference between the two ratings predicts how likely you are to pass it.
Beat a drill rated well above you and your rating rises sharply, because the result was surprising. Beat one well below you and it barely moves, because it was expected. Fail an easy one and you lose more than you would from failing a hard one.
Why this beats counting pots
A raw success rate is almost meaningless without knowing what you attempted. Eighty percent on drills you chose because they suit you says less than fifty percent on drills dealt at random from across the difficulty range.
A rating handles that automatically. It cannot be inflated by picking easy drills, because easy drills stop paying out once you are comfortably above them.
Keeping difficulty in the useful band
Because both sides are rated, the app can deal drills you have roughly a fifty-fifty chance at — the band where you are working at the edge of your ability rather than rehearsing what you already know or flailing at what you do not.
Holding that band automatically is the practical benefit of a rating, more so than the number itself. Without it, keeping practice at the right difficulty means constantly judging your own level, which people are famously bad at.
What the number is not
- It is not a comparison with professionals. It is calibrated against the drill set, not against a tour.
- It is not stable day to day. Short-term movement is mostly noise; the trend over a month is the signal.
- It is not a measure of match play. Drills do not test composure, safety exchanges under pressure, or reading an opponent.
How to read yours honestly
Look at the direction over weeks, not the value after a session. Ratings are noisy by nature — a single bad hour can move yours in a way that means nothing.
The more useful view is per-skill: most players are markedly stronger at potting than at safety or cue ball control, and knowing which facet lags tells you what to practise. That is more actionable than any single number.
Common questions
- Why did my skill rating go down?
- Because you failed drills at or below your current rating, or because a run of results suggested the previous estimate was too high. It is an estimate that updates, not a score you accumulate.
- How long before my rating settles?
- The first several drills move it a lot while the system works out roughly where you are. After that it moves more slowly and the trend becomes meaningful.
Stop choosing your own drills
CueCards deals you a randomised drill at your level, tracks whether you made it, and moves your skill rating accordingly. Free to start, no ads.
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