Sudoku 20x20 num: 212 (Level: hard)
D
1
J
I
5
B
K
I
C
2
G
I
6
A
D
8
4
5
I
9
C
4
H
1
6
A
D
E
1
I
7
B
5
6
4
I
J
2
K
3
C
9
A
D
E
8
1
B
5
G
I
C
9
3
K
8
B
A
4
E
D
F
E
6
J
C
I
B
9
C
D
A
4
C
7
5
G
8
3
D
6
D
E
1
4
3
K
2
C
9
H
4
8
E
A
7
B
K
J
7
D
A
6
1
8
3
C
B
5
J
8
D
A
1
2
5
9
G
E
K
4
A
6
K
G
F
H
9
G
3
1
B
4
C
K
D
9
E
J
A
6AED84H15BF32JGK7I9C
4H15B6AED8K7I9CF32JG
F32JGK7I9C6AED84H15B
K7I9CF32JG4H15B6AED8
A6DE481HB53FJ2KGI7C9
81HB5A6DE4GI7C93FJ2K
3FJ2KGI7C9A6DE481HB5
GI7C93FJ2K81HB5A6DE4
ED6AH184F35BGK2J9C7I
184F3ED6AHJ9C7I5BGK2
5BGK2J9C7IED6AH184F3
J9C7I5BGK2184F3ED6AH
DEA61H483FB5KGJ2C9I7
H483FDEA612C9I7B5KGJ
B5KGJ2C9I7DEA61H483F
2C9I7B5KGJH483FDEA61
72586IJB4A9GFHECK31D
IJB4A72586CK31D9GFHE
9GFHECK31D72586IJB4A
CK31D9GFHEIJB4A72586
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.