Sudoku 20x20 num: 243 (Level: hard)
D
J
I
H
K
A
E
2
D
I
H
K
8
8
3
C
1
D
A
5
C
1
7
A
E
5
F
F
D
A
9
G
I
K
1
E
F
2
A
K
8
B
8
7
K
1
C
6
A
5
K
1
8
9
F
2
A
F
6
9
G
7
I
B
1
9
8
2
6
1
H
7
I
3
K
D
6
9
G
C
1
H
K
5
4
J
G
F
6
6
F
J
A
9
G
B
3
C
K
1
K
4
4
5
7
3
1
E
8
G
C
7
8
G
6
J
H
3
G
2
K
4
H
1
I
C
G
2
H
F
B
4
6
C
7
G
2
K
A
9
F62D9AEJ54G83B7IHKC1
AEJ54F62D9IHKC1G83B7
G83B7IHKC1F62D9AEJ54
IHKC1G83B7AEJ54F62D9
6FD2A9JE458GB3I7KH1C
9JE456FD2A7KH1C8GB3I
8GB3I7KH1C6FD2A9JE45
7KH1C8GB3I9JE456FD2A
2DF6EJ9AG8547I3BC1HK
J9AG82DF6EBC1HK547I3
547I3BC1HK2DF6EJ9AG8
BC1HK547I3J9AG82DF6E
D26FJEA98G45I7B31CKH
EA98GD26FJ31CKH45I7B
45I7B31CKHD26FJEA98G
31CKH45I7BEA98GD26FJ
H359FKB4A6C7GE21I8JD
KB4A6H359F1I8JDC7GE2
C7GE21I8JDH359FKB4A6
1I8JDC7GE2KB4A6H359F
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.