Drill

A drill is a short task that isolates one skill and repeats the cycle of attempt, result, and correction. Unlike playing games without a defined objective, a drill decides in advance what is being practiced and how a correct response will be recognized.

Elements of a useful drill

• A narrow target, such as recognizing forks, attacks by one piece against two or more targets at once, calculating two moves, recalling squares, or executing a basic late-game procedure.
• Enough difficulty to require attention, but not so much that every answer becomes a guess.
• Feedback, meaning prompt information about whether the answer was right, what failed, and why.
• Repetition with correction so that the next attempt does not automatically reproduce the same error.

Drills may use positions with immediate threats, piece routes, memory questions, opening decisions, or endgame procedures. The number of repetitions is not the only measure. If quality falls through fatigue or the player begins recognizing an answer without rebuilding the idea, the material should change or the session should end.

A drill describes what task is repeated. Spaced repetition describes when that task returns over time. The same drill can be concentrated inside one session or distributed across several days.