Iam not sure what the name of the block is, I had put together the square and triangle counts of the colors
for the RWB version.
A 8X8 Grid
White: 20 Squares All 1/2 Square Triangles
Red: 14 Squares White/Blue 12
Blue: 2 Squares Red/Blue 12
White/Red 4
Total of 64 pieces to
match the picture layout. Hope this helps.