The objective of this dissertation is to review the discrepancies between the first edition, Stradal’s edition and Marzocchi’s edition of Reubke’s piano sonata, providing assistance for performers by clarifying inconsistencies between the three editions. Information in reference to major aspects such as fingerings, pedaling, phrasing, tempo markings is presented. Examples of discrepancies found throughout the first movement are discussed in Chapter 3. Detailed assessment of these discrepancies, accompanied by the author’s comments are listed in the comprehensive comparison table in Appendix A. Additionally, directions are given in cases of presumptive errors, and discrepancies are addressed with possible variant solutions. In conclusion, the relative merit of the three editions is assessed in Chapter 4.