Development
m.m 49- 55: The first theme repeated with there are some differences such as measure 50 is repeated in measure 51 again. His theme ends in the first beat of 55 with HC. And it is A flat Major.
m.m 55- 63 : The second theme starts in b flat minor and ends in the first beat of measure 63 with HC.
m.m 63- 100: His is transition part. In the half of measure 63 and its tonality is do minor. Between 63-67 , small part of the second theme is repeated in the left hand then measures 68- 71 little part of the second theme repeated again but this time the right hand has the melody. In measure 70, it modulates to “b flat minor” and after that modulates to “ A flat major” in the 71th measure then modulates to “f minör” in the 74th measure.