Sudoku 20x20 num: 238 (Level: hard)
E
2
8
J
1
5
B
6
2
8
4
D
3
A
B
7
1
J
1
5
B
7
I
2
8
K
H
A
B
J
1
5
F
K
9
4
D
E
9
I
D
4
G
F
E
8
9
B
6
1
C
5
F
6
E
8
7
3
I
D
4
D
I
2
J
G
C
6
K
E
2
J
I
C
7
G
H
7
B
D
K
J
C
7
B
G
J
D
D
9
K
G
3
F
C
2
1
D
I
K
6
3
F
A
D
4
8
1
5
7
B
H
F
1
J
D
I
K
2
7
4
9
A
5
7
F
J
4
7
F
6
K
G
2
6
3
K
7
F
5
I94DE28KGHJ15CF3AB76
28KGHI94DE3AB76J15CF
J15CF3AB76I94DE28KGH
3AB76J15CF28KGHI94DE
9ID42EK8HG1JC53FBA67
EK8HG9ID42FBA671JC53
1JC53FBA679ID42EK8HG
FBA671JC53EK8HG9ID42
4DI98KE2J1GHF35C76AB
KE2J14DI98C76ABGHF35
GHF35C76AB4DI98KE2J1
C76ABGHF35KE2J14DI98
D49IK82E1JHG3FC567BA
82E1JD49IK567BAHG3FC
HG3FC567BAD49IK82E1J
567BAHG3FC82E1JD49IK
A5GEIBCH297FJ84631KD
BCH29A5GEI631KD7FJ84
7FJ84631KDA5GEIBCH29
631KD7FJ84BCH29A5GEI
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.