Sudoku 20x20 num: 213 (Level: hard)
K
G
7
5
E
8
9
K
2
B
8
4
9
D
5
E
D
H
6
8
G
B
1
6
9
7
E
1
I
F
K
2
G
2
7
5
8
9
1
F
I
2
8
9
4
D
H
6
4
K
G
B
C
B
J
F
I
2
K
A
D
C
5
9
7
3
G
K
J
H
4
9
6
I
E
C
5
H
4
6
3
G
4
5
A
G
K
2
3
2
J
A
B
5
8
J
B
7
G
2
5
H
5
4
8
6
G
3
K
J
A
D
7
4
8
F
I
E
2
K
H
F
2
4
J
1
A
6
I
9
4
J
3
D
G
8
1
J
H
2
K23GBAJ1IF7D5HEC6849
AJ1IFK23GBC68497D5HE
7D5HEC6849K23GBAJ1IF
C68497D5HEAJ1IFK23GB
2KG3AB1JFID7H5CE8694
B1JFI2KG3AE8694D7H5C
D7H5CE86942KG3AB1JFI
E8694D7H5CB1JFI2KG3A
3GK2J1BA7DIFEC5H4968
1BA7D3GK2JH4968IFEC5
IFEC5H49683GK2J1BA7D
H4968IFEC51BA7D3GK2J
G32K1JABD7FICEH59486
JABD7G32K159486FICEH
FICEH59486G32K1JABD7
59486FICEHJABD7G32K1
65IBK8HFA24E7J39CD1G
8HFA265IBK9CD1G4E7J3
4E7J39CD1G65IBK8HFA2
9CD1G4E7J38HFA265IBK
Sudoku 20x20
Sudoku 20x20 takes the traditional puzzle format and magnifies it into a truly impressive grid of 20 rows and 20 columns. The board is divided into rectangular regions of 4x5 cells, and the challenge is to place the numbers 1 through 20 so that none repeat in any row, column, or region. Working with a wider range of digits means you'll encounter more complex interactions and patterns, which demand a careful and methodical approach. Rather than focusing on speed, this format rewards patience, steady reasoning, and the ability to keep track of multiple possibilities at once. Solving it feels like navigating a large logical landscape, where every step brings you closer to order.
Each game begins with a selection of pre-filled numbers that serve as your starting framework. From these given values, you gradually uncover the solution by cross-checking rows and columns, testing relationships between regions, and ruling out conflicts. Every 20x20 Sudoku is designed to have a single unique solution, achieved through pure logic and observation. This larger format is ideal for players who want to explore puzzles beyond 12x12, 16x16, or even 18x18, and who enjoy the satisfaction of working on a board that feels expansive and ambitious. It strengthens memory, focus, and problem-solving skills while offering a deeply engaging experience. Completing a 20x20 Sudoku is both a mental workout and a rewarding achievement, transforming a grid full of possibilities into a perfectly balanced structure.