Sudoku 20x20 num: 216 (Level: hard)
A
4
3
9
B
E
7
9
A
I
7
C
D
G
5
F
1
A
8
3
9
2
5
D
3
B
I
8
9
2
B
G
C
H
D
J
9
1
I
K
E
C
E
G
H
K
I
8
D
5
H
A
1
I
A
6
3
E
B
H
K
J
7
6
4
7
F
2
D
H
5
J
1
3
C
B
2
D
6
I
6
8
B
J
K
4
A
6
5
J
K
7
2
B
D
J
7
4
I
A
6
9
G
J
B
D
C
3
8
4
1
8
1
F
A
H
6
4
A
7
B
8
E
D
G
9
6
4
8
1
2
A
J
6
K
G
I
3
A
5
1AI48396B2GE5CDH7FKJ
396B21AI48H7FKJGE5CD
GE5CDH7FKJ1AI48396B2
H7FKJGE5CD396B21AI48
A14I38692BEGC5HDF7JK
8692BA14I3DF7JKEGC5H
EGC5HDF7JKA14I38692B
DF7JKEGC5H8692BA14I3
I41A9683GEB2DH5CKJ7F
683GEI41A9CKJ7FB2DH5
B2DH5CKJ7FI41A9683GE
CKJ7FB2DH5683GEI41A9
4IA16938EG2BHDC5JKF7
938EG4IA165JKF72BHDC
2BHDC5JKF74IA16938EG
5JKF72BHDC938EG4IA16
75B81FC23AKDG9IJHE64
FC23A75B81JHE64KDG9I
KDG9IJHE6475B81FC23A
JHE64KDG9IFC23A75B81
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.