Cain and Abel

Another complicated looking block that is only half square triangles and whole squares.

 

This tutorial is from Patchwork Square.  There is a pdf to download with instructions for a 15 inch block, 10 inch block, 7.5 inch block and 5 inch block; and a couple of layouts for inspiration.

This one is from Amanda Rolfe and makes a super cute 5 inch finished block

This block is based upon a 5x5 grid