Find the missing piece to complete the pattern

Complete the pattern, what figure (1-9) should be at the question mark?

Created by myself

• Why do you let us wait with the solution(s) Mr. Plarsen? Mar 5, 2018 at 18:05
• I am new here and thought that was part of the idea? to wait until someone give the correct answer? Mar 5, 2018 at 18:19
• Oh yes that's right of course! But it would be nice if you could write in the comments of an answer if it's correct or not. Mar 5, 2018 at 18:23
• @watchme oh, sorry I misunderstood. I am on to it right away Mar 5, 2018 at 18:27

I believe it's:

Bottom middle.

Based on:

Pattern matches from top to bottom, diagonal from top left to bottom right, and left to right. + is due to missing option with 2 triangles and rotation.

• Close, you have choosen one with the correct number of inner figure positions. One hint is that both the 4 position cube structures and the 6 position pyramid structures all is someway (sometimes hidden behind others) containing 9 sub-figures that is mapped onto the available 4 or 6 positions. The pattern is quite complex to visualize because of the dynamic limit of available positions. Mar 5, 2018 at 18:33