Sudoku 20x20 num: 263 (Level: hard)
F
K
J
D
1
H
C
4
7
G
3
D
1
K
B
E
4
C
2
6
H
C
B
9
F
J
3
I
B
E
A
G
3
K
J
8
5
K
H
B
5
3
I
K
2
A
C
9
4
3
I
1
E
7
A
D
3
I
F
8
G
F
5
2
1
H
4
9
5
8
K
E
1
F
K
A
4
E
I
C
B
D
5
G
2
8
F
K
F
D
3
G
5
A
E
9
8
J
4
9
1
C
H
1
B
H
E
9
D
G
2
A
4
E
C
3
8
F
I
G
C
J
B
2
E
I
K
9
1
B
2
8
3
4
A
J
6
F
A
9
FKJ85G3D1IA26HCB9E47
G3D1IFKJ85B9E47A26HC
A26HCB9E47FKJ85G3D1I
B9E47A26HCG3D1IFKJ85
KF8JG5D3I12AH6BCE974
5D3I1KF8JGCE9742AH6B
2AH6BCE974KF8JG5D3I1
CE9742AH6B5D3I1KF8JG
J8FK3D5GA21ICB6H479E
D5GA2J8FK3H479E1ICB6
1ICB6H479EJ8FK3D5GA2
H479E1ICB6D5GA2J8FK3
8JKFD3G52AI1BCH674E9
3G52A8JKFD674E9I1BCH
I1BCH674E98JKFD3G52A
674E9I1BCH3G52A8JKFD
9615FEHIGK4CA3J7B2D8
EHIGK9615F7B2D84CA3J
4CA3J7B2D89615FEHIGK
7B2D84CA3JEHIGK9615F
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.