Sudoku 20x20 num: 289 (Level: hard)
A
1
K
9
I
5
3
G
K
B
6
J
7
4
G
D
I
5
F
H
I
F
H
3
G
7
1
8
B
4
3
D
8
B
A
J
K
9
5
I
F
8
A
7
E
H
3
I
F
2
H
G
3
C
A
K
1
H
3
F
2
A
J
K
I
2
D
G
B
1
C
9
E
8
B
1
I
D
6
I
5
A
8
E
B
K
6
4
C
3
5
7
3
4
6
4
2
7
B
1
2
G
H
8
K
5
3
2
1
F
I
4
5
K
9
1
A
D
5
C
8
E
I
8
5
1
G
K
J
D
5
B
7
G
F
6
K
J
9
A
AJE71K8B96I52FH43GCD
K8B96AJE7143GCDI52FH
I52FH43GCDAJE71K8B96
43GCDI52FHK8B96AJE71
JA7EK1B8695IF24HG3DC
1B869JA7EKHG3DC5IF24
5IF24HG3DCJA7EK1B869
HG3DC5IF241B869JA7EK
E7AJ8B1KI596H42FCD3G
B1KI5E7AJ8FCD3G96H42
96H42FCD3GE7AJ8B1KI5
FCD3G96H42B1KI5E7AJ8
7EJAB8K15I694HF2DCG3
8K15I7EJAB2DCG3694HF
694HF2DCG37EJAB8K15I
2DCG3694HF8K15I7EJAB
3291AGF6KJCHI8ED45B7
GF6KJ3291AD45B7CHI8E
CHI8ED45B73291AGF6KJ
D45B7CHI8EGF6KJ3291A
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.