The Diminished Scale

This scale, which is shown in example 1, consists of alternating major and minors 2nds (this is one reason to also call this scale whole tone-half tone-whole tone). Most of the chords we find are of diminished quality. There are only 2 modes of this scale: one which starts with the major 2nd and followed by a minor 2nd, and the other one starting with the minor 2nd, followed by the major 2nd. There are only 3 transpositions: the one at example 1, the second one which starts with C#-D# and the other one which starts with D-E (example 2), any other transposition or mode will only duplicate the material contents.

Example 1

Example 2

Additional resources about diminished scales:

Diminished Scale teoría's Book of Scales