Sudoku 20x20 num: 254 (Level: hard)
2
6
D
K
H
5
7
3
C
A
D
B
9
J
E
H
E
8
B
I
6
F
K
7
8
B
9
1
G
J
H
F
7
3
6
F
B
I
K
2
F
B
8
9
I
E
4
G
E
9
A
6
F
5
8
1
4
7
6
6
A
F
9
F
A
C
K
I
9
4
J
9
8
B
A
2
K
5
E
7
3
J
F
1
6
C
2
A
H
E
J
I
F
A
6
5
9
I
7
H
3
4
H
9
I
B
8
5
D
G
9
I
8
7
H
D
6
8
7
F
6
9
4
B
D
9
K
1
5
8
J
7
C
4
G
I
6
B
E
2
C26ADFK5731GJEH48BI9
FK573C26AD48BI91GJEH
1GJEH48BI9C26ADFK573
48BI91GJEHFK573C26AD
2CA6FD5K37G1EJ4HB89I
D5K372CA6FHB89IG1EJ4
G1EJ4HB89I2CA6FD5K37
HB89IG1EJ4D5K372CA6F
6AC2K5DF1G73H4JEI98B
5DF1G6AC2KEI98B73H4J
73H4JEI98B6AC2K5DF1G
EI98B73H4J5DF1G6AC2K
A62C5KFDG1374HEJ9IB8
KFDG1A62C5J9IB8374HE
374HEJ9IB8A62C5KFDG1
J9IB8374HEKFDG1A62C5
8J7DCBE3F2IH1K694G5A
BE3F28J7DC94G5AIH1K6
IH1K694G5A8J7DCBE3F2
94G5AIH1K6BE3F28J7DC
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.