"Holger's Tune" opens pianist Holger Marjamaa's album Mostly Standards with an original composition that signals the Estonian-born musician's dual identity as both an interpreter of the jazz canon and a developing composer. The 62-bar AABA form in D minor at a brisk 265 beats per minute provides a distinctive and expansive harmonic framework, its unusual length distinguishing it from standard 32-bar structures. Marjamaa's three-chorus piano solo navigates his own changes with the authority of a composer who knows every corner of the harmonic architecture, his playing combining post-bop vocabulary with a European harmonic sensibility. Released in 2019, Mostly Standards documents Marjamaa's work as a leader in a small-group setting, capturing his technical command and improvisational fluency. The title track sets the tone for an album that balances respect for the jazz tradition with a personal creative voice. As one of only two originals on the record, "Holger's Tune" provides insight into the pianist's compositional thinking, with its extended form and minor tonality creating a framework that is simultaneously challenging and swinging. The fast tempo demands considerable technical facility, and Marjamaa rises to the occasion with playing that is both virtuosic and musically coherent.