Sudoku 20x20 num: 244 (Level: hard)
K
7
8
6
4
H
K
B
3
6
G
8
5
J
6
C
I
K
B
F
G
1
4
8
A
H
B
9
B
A
J
5
G
F
B
3
H
G
1
D
E
A
8
J
6
I
3
H
K
F
B
5
1
D
E
3
3
C
K
2
H
D
F
5
6
G
2
E
I
G
B
J
J
A
9
2
H
D
1
6
B
5
C
K
C
F
B
5
6
I
7
4
1
F
B
5
A
F
B
J
5
A
G
6
K
H
D
E
4
G
J
H
7
6
8
B
2
9
G
1
K
4
D
F
C
8
2
9
4
E
5
4
6
B
2
1
G
A
H
B
9C3I2HK7BFED8A5J6G14
HK7BF9C3I2J6G14ED8A5
ED8A5J6G149C3I2HK7BF
J6G14ED8A5HK7BF9C3I2
C9I3H27KFBDEA8J5G641
27KFBC9I3H5G641DEA8J
DEA8J5G641C9I3H27KFB
5G641DEA8J27KFBC9I3H
3I9CK72HEDBF5J8A146G
72HED3I9CKA146GBF5J8
BF5J8A146G3I9CK72HED
A146GBF5J872HED3I9CK
I3C97KH2DEFBJ5A841G6
KH2DEI3C97841G6FBJ5A
FBJ5A841G6I3C97KH2DE
841G6FBJ5AKH2DEI3C97
68B29GAFHC15EK34JD7I
GAFHC68B294JD7I15EK3
15EK34JD7I68B29GAFHC
4JD7I15EK3GAFHC68B29
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.