Sudoku Rules

Easy

Normal

Hard

Expert

Master

Sudoku Techniques: X-Wing

X-Wing

Spot the 2×2 rectangle that forms the X-Wing pattern

Sudoku Techniques: XY-Wing

XY-Wing

Sometimes just called “Y-Wing”. Find three cells that form a “Y”-shape

Sudoku Techniques: Swordfish

Swordfish

Spot the 3×3 rectangle that forms the Swordfish pattern

Sudoku Techniques: Jellyfish

Jellyfish

Spot the 4×4 rectangle that forms the Jellyfish pattern