Sudoku 20x20 num: 215 (Level: hard)
H
A
J
8
A
3
4
K
H
E
B
9
F
9
C
8
1
E
3
4
K
6
A
7
G
5
8
D
1
F
9
C
2
3
K
H
A
H
G
9
I
8
7
5
K
A
8
1
F
9
B
F
D
E
2
5
C
E
B
F
9
H
A
4
H
E
8
H
F
4
E
C
5
J
1
7
8
D
C
I
7
B
K
6
2
2
F
I
C
9
E
B
F
4
3
1
D
8
5
G
I
J
6
3
7
A
H
B
D
8
C
9
6
K
7
J
D
C
F
2
E
I
7
8
H
I
6
1
C
2
E
I
6
J
G
7
1
9
4
8
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A27G534K6HI8D1EFBJ9C
FBJ9CI8D1E34K6HA27G5
I8D1EFBJ9CA27G534K6H
436KAH725GBF9JICD8E1
H725G436KACD8E1BF9JI
BF9JICD8E1436KAH725G
CD8E1BF9JIH725G436KA
K63427HAFBG5CIJ91E8D
7HAFBK634291E8DG5CIJ
G5CIJ91E8DK63427HAFB
91E8DG5CIJ7HAFBK6342
6K4372AHBF5GIC9JE1D8
2AHBF6K437JE1D85GIC9
5GIC9JE1D86K4372AHBF
JE1D85GIC92AHBF6K437
8JGH3D95A41CF2KEIB76
D95A48JGH3EIB761CF2K
1CF2KEIB768JGH3D95A4
EIB761CF2KD95A48JGH3
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.