Super Sudoku Page

Prepare for the ultimate sudoku challenge: sudoku with one, two, three, and even four rows per box. Can you handle it?

Sudoku Challenge #1
Grid size: 1 x 1
Number of boxes (filled in): 1 (o)
Digits: Use number 1
Level of Difficulty: None

Sudoku Challenge #2
Grid size: 4 x 4
Number of boxes (filled in): 16 (6)
Digits: Use numbers 1-4
Level of Difficulty: Easy
Sudoku Challenge #3
Grid Size: 9 x 9
Number of boxes (filled in): 81 ( c)
Digits: Use numbers 1-9
Level of Difficulty: Moderate

Sudoku Challenge #4
Grid Size: 16 x 16
Number of boxes (filled in): 256 (104)
Digits: Use numbers 1-16
Level of Difficulty: Hard