Is there a drill that can be used to measure my level of play?
Many “playing the ghost” player rating drills have been developed and used over the years. The phrase “playing the ghost” implies that you are playing by yourself against a fictitious opponent (the “ghost”) who never misses. A ghost drill consists of racking a certain number of balls (e.g., 7, 9, 10, 15), breaking, taking ball in hand after the break, and attempting to run out. Alternatively, you can just randomly spread the balls on the table before taking ball in hand. If you run out, you have beaten the “ghost.” You can keep score by keeping track of your rack winning percentage or by totaling the total number of balls pocketed before missing in a given number of racks (e.g., 10).
“Playing the ghost” drills are useful to rate your level of play and track improvement over time. They also provide practice with offensive skills (shot making, position play, handling of clusters and problem balls, and breaking). Safety play, a very important part of the game, is not addressed in “playing the ghost” drills. Example “playing the ghost” drills and rating systems are the 9-ball rating drill (which provides a 1-10 and A-D rating) and the 10-ball version described below. The 15-ball-rotation rating drill provides a similar way to rate performance. The 10-ball-ghost version is the most recommended and seems to provide fairly accurate player ratings. Here’s a record-keeping spreadsheet created by “tashworth19191” (in AZB post) useful for tracking progress over time with the 9-ball rating drill. Videos of many people doing a race-to-seven and other “playing the ghost” challenges can be found in the AZB Ghost Challenge thread.
The “playing the ghost” drills do not test a complete range of pool skills, but they do a decent job at rating a person’s primary offensive skills. However, the scores can vary a lot from one session to the next, and there can be a fair amount of luck (both good and bad) involved concerning ball clustering and weird run-out patterns; but if you do a bunch of sessions and throw out the low and high scores, the median (middle) score provides a fairly accurate measure of one’s offensive ability.
A better system for determining and monitoring a player’s level of ability is the Billiard University (BU) rating system. It assesses a wide range of important pool skills in a methodical, thorough, and consistent way. It also provides a numeric and descriptive rating. The BU rating comparison chart shows how the BU rating correlates to other commonly used rating and handicapping systems.
As with all rating systems and drills, results can vary with table size. Generally, the rating systems are developed assuming the drills are done on a typical-difficulty-level, standard 9′ table. The Table Difficulty Factor (TDF) offers a way to compare difficulty levels of different tables to help put scores and ratings into proper perspective.
More rating drills can be found under drills here.