How Do You Choose a Piece That Is Challenging Without Being Unlearnable?

Building a Piano Piece · Season Two: From One Piece to Long-Term Progress · Article Five

A piece is loved, and the score looks only a little harder than current repertoire. It easily becomes the next goal. Yet difficulty is not one property printed on a cover. The same work may be sight-reading for one learner, a long-term challenge for another, a physical risk for a third, or a task whose components cannot yet be organised.

Examination grades, method levels and editors’ labels are useful starting points. They cannot replace an individual judgement. One learner may handle rapid scales but have little polyphonic experience. Another may read slowly while possessing strong aural memory. The functional demand of the same graded work is not equal for both.

Selection should not seek the hardest work whose notes can barely be reached. It should find a functional position: new learning must arise while the learner remains able to hear, diagnose and progressively integrate the problems.

The challenge point is a framework, not a success-rate formula

The challenge-point framework in motor learning distinguishes nominal task difficulty from functional difficulty. The same task generates different amounts of usable information for a novice and an expert. Too little demand may provide little learning information; too much can exceed the learner’s ability to process it. The original framework offers piano learners a useful question: difficulty exists relative to skill and practice conditions.

It was not a piano-repertoire experiment, and it did not establish that “seventy per cent correct at first reading” is an ideal level. Subsequent motor research has produced mixed evidence about a unique optimum. A study of visuomotor learning notes that relations among task difficulty, acquisition, retention and transfer are not reduced to choosing the middle level. The framework should organise judgement, not become a numerical repertoire calculator.

Music also has a motivational dimension. A case study of a beginning clarinettist compared teacher-assigned and self-selected repertoire. The learner spent more time and used more advanced strategies on her own selection. A one-person case cannot prove that a loved piece is always learnt better, but it demonstrates how interest changes functional difficulty. Music that sustains observation and problem solving is not equivalent to suitably graded music that the student refuses to approach.

Eight dimensions instead of one grade

Before deciding, inspect a candidate work across eight dimensions.

1. Reading load

Are key signature, accidentals, clef changes, cross-stave notation, voices and rhythms recognisable? If every bar requires note-by-note decoding, working attention is consumed before sound and movement can be monitored.

2. Rhythm and time

Does the piece contain unfamiliar syncopation, polyrhythm, ornaments, tempo flexibility or long-range metre? Counting a rhythm away from the piano does not guarantee maintaining it between hands, pedal and phrase.

3. Keyboard geography

Do spans, leaps, black–white-key combinations, repeated notes, double notes or rapid relocations exceed current orientation? A hand being physically able to reach an interval does not establish repeatability at musical tempo and dynamic.

4. Hands and voices

Are the hands simply aligned, or do they use complementary rhythms, crossing, three-against-two, transferred melody or independent polyphony? Several entirely new relations at once may constitute a curriculum rather than one challenge.

5. Speed and endurance

Can local groups safely approach the required movement? Does sustained repetition, chordal work or octaves increase load over a whole section? Target tempo is not the only criterion, but some movement organisation differs between extreme slow practice and performance speed; short safe sampling is needed.

6. Sound and style

Can the learner imagine a plausible sound? Baroque polyphony, Classical transparency, Romantic voicing and pedal, and Impressionist colour demand different listening. Correct notes without a sound model may place the work beyond present independent judgement.

7. Length, structure and memory

One densely notated page may be harder than four pages of repeated structure. Longer works add planning, proportion and memory maintenance. Page count alone is misleading.

8. Body and resources

Hand span, existing symptoms, available time, teacher support, edition quality and reliable models alter functional difficulty. A piece appropriate with regular teacher intervention may be unsuitable for unsupported learning.

Replace a cover judgement with three trials

A candidate piece does not require an immediate promise of completion.

Trial one: map it. Spend ten to fifteen minutes surveying the complete score. Mark form, recurrent material and the three highest-load locations. If the principal organisation remains invisible, choose an easier entry or obtain assistance.

Trial two: cold-read it. Select one easy, one moderate and one difficult passage. Read while preserving pulse. Classify failure as notation, rhythm, location, coordination, sound or load. A wrong-note count is insufficient.

Trial three: test its response to learning. Give the hardest passage twenty minutes of diagnosis and targeted practice. Leave for five minutes, then return. The question is not whether it is mastered. Can the problem be separated? Did one strategy produce a repeatable change? Is the next step describable?

If twenty minutes leaves only “repeat it more”, there is too little control. The piece may require a teacher, reduced or fragmentary study, prerequisite repertoire, or postponement as a complete work.

Assign a role instead of declaring can or cannot

The same work can occupy different roles:

• Fluency repertoire: below maximum capacity, used for reading, continuity and timely completion.
• Growth repertoire: mostly manageable while introducing one or two concentrated new problems.
• Challenge repertoire: a longer project requiring teaching and detailed planning.
• Study fragment: one section used for a sound, harmony or technical problem without promising the entire piece.
• Future repertoire: a preserved aspiration, edition and recording list to revisit after prerequisites develop.

This avoids two extremes. Loving a difficult work does not oblige immediate conquest, and a grade above the present level does not forbid all contact. A fragment can provide direction while main learning time remains with music that can be integrated.

A practical red–amber–green decision

Mark each of the eight dimensions:

Green: already available and manageable at first contact.

Amber: new, but responsive to an identifiable strategy.

Red: the problem cannot be explained, movement appears unsafe, or a missing prerequisite controls the task.

A useful growth piece will usually contain much green and a limited concentration of amber. It should not be red across reading, rhythm, movement, voicing, endurance and style simultaneously. There is no fixed ratio; teaching support, deadlines and intended role alter the decision. Two interdependent red problems in the same passage—an uncontrolled span combined with an unfamiliar polyrhythm, for example—often indicate the value of bridge repertoire.

Ask also what can be carried away after completion. If a new demand occurs once in a peculiar bar, the investment may offer limited return. A texture repeated through the work and encountered in later repertoire may form a worthwhile growth task.

Difficult pieces are not the only path to progress

Easier music can train rapid mapping, independent fingering, finished sound, sight-reading, memory and reliable single-take performance. A learner who spends years exclusively on works beyond current capacity can develop a paradoxical profile: able to assemble a few difficult passages slowly, yet unable to read, finish and maintain a range of music.

A long-term portfolio should therefore combine readily finished works with a small number of genuine challenges. Easy does not mean careless; sound, style, memory or deadline can be raised. Challenging does not mean maximally difficult; usable challenge keeps feedback interpretable.

When postponement is the right result

The following are information, not failure: basic pulse remains absent after weeks; nearly all work is consumed by single-note decoding; near-tempo movement is possible only with markedly increased force; every session rebuilds the same location; a teacher identifies a missing prerequisite; or the piece repeatedly provokes pain and persistent discomfort.

Keep analysis, fingering decisions and recordings, choose one or two bridge pieces, and test again after several months. Postponement does not erase the investment. It converts unprocessable difficulty into a future target.

The selection judgement can be stated clearly:

A suitable growth piece need not sound good at first, but after limited practice it must make the problem, the effective response and the path back into the music more intelligible.

That is what it means for a work to be challenging without being unlearnable.

Primary sources and further reading

• The original challenge-point framework
• Experimental study of task difficulty in visuomotor learning
• Case study of student-selected repertoire and practice behaviour
• Self-regulated practice among tertiary piano students
• Trinity College London teacher resource on choosing piano repertoire

Continue reading: Building a Piano Piece series page

If you would like to bring these ideas about listening, understanding, and practice to the keyboard, you might try ScoreFlow, an app I developed to make score reading and daily practice flow more naturally together.