Six skills, three levels each
The launch library contains three positions for each of six skills: center control, hole prevention, long bars, L-shapes, combos, and recovery. Starter positions isolate the pattern. Focused positions add a competing goal. Tight positions reduce the number of acceptable alternatives.
Every board is deterministic and remains on this page. Exercise selection uses local component state rather than an indexable URL, preventing dozens of thin near-duplicate pages.
How to practice well
Before checking advice, identify the hardest visible piece and count its legal placements. Describe what your first move must preserve. Then compare that reasoning with the board-health components and the corresponding strategy guide.
More than one move can be acceptable. The purpose is to explain a tradeoff, not to claim a single universally optimal origin. A move with lower health may be justified when it completes a high-value clear and guarantees the rest of the tray.
Transfer the lesson
After solving a focused board, play an endless run and watch for the same geometry. When a difficult position appears, recreate it in the analyzer. Repetition turns a general slogan into a visible decision routine.
Exercise review standard
Positions use only the shared game engine and original piece library. They are reviewed for at least one legal route, a clear lesson, and a counterexample where mechanical application of the strategy would be weaker.
What each exercise family measures
Center-control drills compare approach directions and connected space. Hole-prevention drills ask whether a gap is truly isolated or has an immediate repair. Long-bar drills inventory contiguous lanes, while L-shape drills focus on bends and orientation. Combo drills compare reward with resolved geometry. Recovery drills search for enabling clears when one shape is nearly blocked.
Each family has a starter, focused, and tight position. Starter boards remove distractions. Focused boards introduce one competing objective, such as a clear that costs a lane. Tight boards reduce alternative origins and require a full-tray check. Difficulty describes constraint, not player ability.
How feedback avoids false certainty
Authored advice identifies the intended signal, but several placements can remain acceptable. A move is not rejected merely because it differs from one stored coordinate. Compare its legal result, health components, clear outcome, and protection of the visible tray. The site states when a lesson is conditional and includes counterexamples in the related guides.
If an exercise appears impossible, first confirm the exact piece orientation and look for a clear from another piece. If no route remains, use the analyzer to check legal origins and report the exercise identifier through Contact. Reproducible IDs make a correction possible without collecting a personal play history.
A four-pass practice routine
- Describe the board's weakest structure before moving.
- Count landing zones for the hardest offered shape.
- Choose an origin and predict the health direction.
- Compare the resolved board, then retry or advance.
Repeat one family across all three levels before switching topics. That sequence isolates the pattern, adds a conflict, and finally tests it under pressure. Apply the same scan in endless or daily play so the lesson transfers beyond the authored board.