It is made up of five charming, simple miniatures, each of which presents a separate pianistic problem – alternating right and left hand during playing while maintaining melodic continuity (I), independence of tonal-harmonic planes (II), playing of multiphonics and production of several textural planes (III), rhythmic independence of two voices and the resulting ostensible polymetry (IV) and exposition of melodic planes placed alternately in the upper and lower registers (V). 

The various parts of the cycle have titles indicating the performance problems solved by Mycielski:

Part I: Pièce en ut-majeur

Part II: Analyse harmonique

Part III: Tenoit, en mesure

Part IV: Analyse rythmique

Part V: Tendrement, en mesure

In February 1946, Mycielski added a sixth part to the cycle, closing this musical piece with a tonal reprise – Retour a ut.