Request from Spain for No. 17. Level 4. Google search of No. 17 led me to this score. Thanks to Luka Josipovic who questioned it. He is correct. This one is No. 19. That means I have to find No. 17 and do that one! https://sites.google.com/site/pianoandmathtutorials/chopin-s-waltzes Jane, a retired university math teacher, started this volunteer project in April 2009. Positive feedback from wonderful viewers worldwide keeps her motivated. Jane is a strong advocate of reading music. She made unconventional sight-reading lessons that simplifies reading music. https://sites.google.com/site/pianoandmathtutorials/sight-reading-lessons