Sudoku 20x20 num: 261 (Level: hard)
2
D
B
9
K
F
C
9
D
F
4
7
J
I
E
2
G
D
F
8
1
A
B
6
H
E
3
B
6
1
K
D
9
H
6
E
G
C
I
7
8
1
4
E
K
F
7
8
J
D
G
G
2
B
9
D
6
H
5
4
F
1
E
7
F
H
6
7
E
2
B
9
8
6
H
9
1
2
C
A
5
4
F
I
D
8
3
E
9
5
F
I
6
J
K
6
A
7
I
E
9
5
7
4
6
C
8
E
I
6
D
H
C
K
8
7
J
9
G
D
7
9
G
4
K
B
3
7
J
9
6
2
7
1
9
K
8
2
D
E
E23GDCB96H815AKJIF47
CB96HE23GDJIF47815AK
815AKJIF47E23GDCB96H
JIF47815AKCB96HE23GD
2EG3CD9BH618A5JKFI74
D9BH62EG3CKFI7418A5J
18A5JKFI742EG3CD9BH6
KFI7418A5JD9BH62EG3C
3GE2B9DC816HKJ5A47IF
9DC813GE2BA47IF6HKJ5
6HKJ5A47IF3GE2B9DC81
A47IF6HKJ59DC813GE2B
G32E9BCD18H6JKA574FI
BCD18G32E9574FIH6JKA
H6JKA574FIG32E9BCD18
574FIH6JKABCD18G32E9
I56DEFAHC24K8B37J19G
FAHC2I56DE7J19G4K8B3
4K8B37J19GI56DEFAHC2
7J19G4K8B3FAHC2I56DE
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.