Sudoku 20x20 num: 268 (Level: hard)
I
4
B
5
C
D
J
6
F
9
H
8
3
4
6
F
9
1
D
D
I
3
7
H
8
6
F
D
2
K
8
E
3
B
3
7
4
H
B
K
1
F
9
A
3
7
4
J
6
1
1
9
A
3
7
B
8
5
6
C
D
8
K
E
7
7
3
J
D
8
K
A
J
E
G
9
4
2
J
D
I
K
4
3
C
G
9
A
H
C
7
I
9
A
6
5
5
E
A
3
I
H
B
C
D
F
6
E
B
1
I
6
E
I
5
A
4
9
5
6
E
B
9
G
C
K
4
J
4
B
I
5
8
7
C
K
2
D
E
B
I347BHK8E5C1D2JG6FA9
HK8E5I347BG6FA9C1D2J
C1D2JG6FA9I347BHK8E5
G6FA9C1D2JHK8E5I347B
3I74HB8K5E1C2DGJF69A
B8K5E3I74HJF69A1C2DG
1C2DGJF69A3I74HB8K5E
JF69A1C2DGB8K5E3I74H
47I3K8BHC1E5JGD2A96F
8BHC147I3K2A96FE5JGD
E5JGD2A96F47I3K8BHC1
2A96FE5JGD8BHC147I3K
743I8KHB1C5EGJ2D9AF6
KHB1C743I8D9AF65EGJ2
5EGJ2D9AF6743I8KHB1C
D9AF65EGJ2KHB1C743I8
6DEBIF25H3AJCK49G187
F25H36DEBI9G187AJCK4
AJCK49G1876DEBIF25H3
9G187AJCK4F25H36DEBI
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.