Sudoku 20x20 num: 298 (Level: hard)
I
K
8
E
H
1
J
I
K
D
7
7
G
F
H
A
3
J
6
E
5
4
B
K
I
K
J
4
D
2
F
G
C
1
J
B
3
C
2
E
7
6
A
B
K
4
H
C
D
E
2
7
J
B
9
3
I
I
3
9
1
7
2
4
F
4
J
F
H
9
5
K
8
E
4
J
7
K
3
9
1
K
J
H
I
1
7
A
H
J
F
G
7
6
H
C
3
1
8
K
D
E
A
J
4
F
D
E
1
K
2
B
G
5
F
1
2
J
8
C
4
K
6
A
I
F
1
C
4
2
J
3
G
H
2
J
B
4
K
9
9BI3K8514JED72GFCHA6
8514J9BI3KFCHA6ED72G
ED72GFCHA69BI3K8514J
FCHA6ED72G8514J9BI3K
B93I8K15J4DE27FGHC6A
K15J4B93I8GHC6ADE27F
DE27FGHC6AB93I8K15J4
GHC6ADE27FK15J4B93I8
I39B51K8ED4JGF72A6CH
1K8EDI39B52A6CH4JGF7
4JGF72A6CHI39B51K8ED
2A6CH4JGF71K8EDI39B5
3IB9158KDEJ4FG276AHC
58KDE3IB9176AHCJ4FG2
J4FG276AHC3IB9158KDE
76AHCJ4FG258KDE3IB91
C74K9H2J8BAGE5I6FD13
H2J8BC74K96FD13AGE5I
AGE5I6FD13C74K9H2J8B
6FD13AGE5IH2J8BC74K9
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.