Sudoku 20x20 num: 285 (Level: hard)
3
1
I
7
G
4
8
3
9
F
F
9
B
5
G
E
D
B
G
4
8
C
J
G
I
1
2
5
7
K
J
H
2
B
1
D
A
1
2
5
7
K
8
C
J
H
G
6
4
2
F
3
4
8
6
H
1
7
9
H
J
5
9
B
E
2
D
4
1
I
5
9
6
G
A
F
7
4
E
2
1
F
J
6
J
G
A
4
I
1
7
H
F
A
C
J
1
B
9
E
4
I
E
1
C
8
6
3
A
5
D
2
I
H
K
1
3
I
D
C
B
K
9
7
2
A
J
J
D
3
B
E
7
J
B
I
E
K
4
8
8KJC3H6G4EAF1I2D9B75
H6G4E8KJC3D9B75AF1I2
AF1I2D9B758KJC3H6G4E
D9B75AF1I2H6G4E8KJC3
K8CJH3G6E4FAI1D2B957
3G6E4K8CJH2B957FAI1D
FAI1D2B957K8CJH3G6E4
2B957FAI1D3G6E4K8CJH
JC8K6G3HAF4E2D1I759B
G3HAFJC8K6I759B4E2D1
4E2D1I759BJC8K6G3HAF
I759B4E2D1G3HAFJC8K6
CJK8G6H3FAE4D2I157B9
6H3FACJK8G157B9E4D2I
E4D2I157B9CJK8G6H3FA
157B9E4D2I6H3FACJK8G
91438BIEHK72A6J5DFGC
BIEHK914385DFGC72A6J
72A6J5DFGC91438BIEHK
5DFGC72A6JBIEHK91438
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.