Logic Masters Deutschland e.V.

Many years ago this grid used to appear in a supplement magazine for a Saturday newspaper under the name Super Sudoku X. I’ve always fancied making a puzzle using this grid, so I settled on a numberless version with extended high, low, odd, even clues.

Rules

Place digits 1-8 in each row, column, 2x4 outlined box, 4x2 shaded box and both diagonals.
Letters indicate the type of number in that cell,

H is a high number (4)
E is an even number (4)
L is a low number (4)
P is a prime number (4)
F is a factor of 10 (3)
O is an odd number (4)
X is a power of 2. I.e. X=2ⁿ, where n is an integer (4)

Brackets indicate how many numbers are in each group.

penpa+ link

CtC link

Note. The Penpa+ version lists all possible numbers for each clue in the rules to clear up any confusion.