Sudoku 20x20 num: 226 (Level: hard)
6
2
4
G
J
F
3
5
9
G
I
D
H
2
4
A
F
8
3
K
5
6
C
E
5
K
D
H
6
1
C
6
C
G
H
3
K
E
A
J
I
6
9
F
B
8
7
F
A
C
2
G
J
H
5
9
A
D
1
C
G
D
C
1
I
A
E
H
K
7
8
5
6
I
4
B
F
3
A
H
K
G
2
G
F
D
K
3
A
5
I
G
F
6
8
D
7
8
9
C
1
J
F
9
5
K
G
B
6
8
D
5
3
1
B
2
9
J
3
4
6
9
7
C
B
I
A
2
J
E
D
6
5
1
C
A
K
2
H
4
612C4GIJDHBF83K7E5A9
GIJDH612C47E5A9BF83K
BF83K7E5A9612C4GIJDH
7E5A9BF83KGIJDH612C4
16C2G4JIHDFB387K5E9A
4JIHD16C2GK5E9AFB387
FB387K5E9A16C2G4JIHD
K5E9AFB3874JIHD16C2G
2C61IJ4GBFDHK783A9E5
J4GBF2C61I3A9E5DHK78
DHK783A9E52C61IJ4GBF
3A9E5DHK78J4GBF2C61I
C216JIG4FBHD7K389A5E
IG4FBC216J89A5EHD7K3
HD7K389A5EC216JIG4FB
89A5EHD7K3IG4FBC216J
E8D4653HG1AKBI297FJC
53HG1E8D4697FJCAKBI2
AKBI297FJCE8D4653HG1
97FJCAKBI253HG1E8D46
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.