Sudoku 20x20 num: 206 (Level: hard)
6
5
8
1
K
H
B
1
C
8
D
3
H
H
9
J
D
5
4
C
I
I
E
2
4
H
7
F
B
E
G
C
5
A
9
2
H
7
H
D
6
G
F
B
D
J
E
G
6
5
K
E
A
4
C
7
3
H
J
K
A
2
I
D
F
F
9
8
6
K
A
4
F
7
3
2
1
8
I
6
E
G
C
7
H
D
9
1
A
2
8
I
5
6
D
J
C
F
D
I
5
1
A
2
4
3
D
B
7
1
5
3
E
6
A
4
7
2
3
C
D
7
2
J
F
1
J
I
2
K
3
A
5
D
8
F
1
H
A
5
65I8EA1KCG423HF7B9JD
A1KCG65I8E7B9JD423HF
423HF7B9JD65I8EA1KCG
7B9JD423HFA1KCG65I8E
568IAEK1GC24H37F9BDJ
EK1GC568IAF9BDJ24H37
24H37F9BDJ568IAEK1GC
F9BDJ24H37EK1GC568IA
I8651KEA42CGF73HJDB9
KEA42I8651HJDB9CGF73
CGF73HJDB9I8651KEA42
HJDB9CGF73KEA42I8651
8I56K1AE24GC7FH3DJ9B
1AE248I56K3DJ9BGC7FH
GC7FH3DJ9B8I56K1AE24
3DJ9BGC7FH1AE248I56K
B3CE69HGA5JF41ID72K8
9HGA5B3CE6D72K8JF41I
JF41ID72K8B3CE69HGA5
D72K8JF41I9HGA5B3CE6
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.