Assembly

STEP 1 - Remove all edge pieces and set aside

STEP 2 - Separate tiles into 2 piles - Style 'A' and 'B'

A Tiles - small dark square in the lower right corner / crosshatch pattern on left

B Tiles - small dark square in the lower left corner / crosshatch pattern on right

STEP 3 - Match Corners

Match patterns in corner of A Tiles

Match remaining B Tiles according to pattern

STEP 4 - Choose a Layout

Option 1

Option 2

STEP 4 - Attach Tiles and Edge Pieces

Since there are 2 styles, edge pieces are interchangeable and don't always match the tile pattern exactly. Correct positioning for corners shown in red.