Sudoku 20x20 num: 242 (Level: hard)
D
9
2
H
3
B
1
F
6
G
9
2
9
2
3
1
7
8
C
H
3
B
G
8
8
2
A
5
3
D
6
K
E
B
1
J
A
J
A
1
7
E
8
4
F
D
C
G
B
3
I
9
D
G
7
F
C
6
F
J
K
2
I
B
F
J
8
7
C
G
K
A
3
B
4
7
C
D
B
H
F
8
E
7
C
8
D
J
5
2
I
B
F
D
J
8
7
6
1
3
K
G
5
K
2
A
1
6
1
K
H
5
4
7
A
G
E
K
F
1
9
I
7
3
D
8
1
9
5
9
C
H
D
7
H
5
K
A
G
E
E748DFC6GK9JA25H3B1I
FC6GKE748DH3B1I9JA25
9JA25H3B1IE748DFC6GK
H3B1I9JA25FC6GKE748D
7E84FD6CKGJ92AH5B3I1
D6CKG7E84F5B3I1J92AH
J92AH5B3I17E84FD6CKG
5B3I1J92AHD6CKG7E84F
48E7C6DF9JGK5HA21I3B
6DF9J48E7C21I3BGK5HA
GK5HA21I3B48E7C6DF9J
21I3BGK5HA6DF9J48E7C
847E6CFDJ9KGH52AI1B3
CFDJ9847E6AI1B3KGH52
KGH52AI1B3847E6CFDJ9
AI1B3KGH52CFDJ9847E6
3AGDEB2KF7159C4IHJ68
B2KF73AGDEIHJ68159C4
159C4IHJ683AGDEB2KF7
IHJ68159C4B2KF73AGDE
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.