Sudoku 20x20 num: 262 (Level: hard)
I
F
G
9
E
A
7
1
G
4
5
A
C
D
I
F
6
G
9
4
C
1
D
9
4
H
F
H
K
6
G
4
2
E
A
4
I
H
C
8
D
8
1
7
9
G
B
4
A
7
3
4
G
4
B
E
1
A
K
H
F
1
C
E
3
2
A
H
D
J
2
7
1
C
B
8
6
G
G
K
D
B
4
E
3
1
7
5
H
7
A
4
2
B
4
E
3
7
A
5
G
6
3
B
E
G
D
F
9
A
I
C
2
G
8
F
A
3
6
I
1
8
7
H
D
1
J
9
3
6
C
2
1
8
5
D
H
2
B
F
IFH56KG94BDJ32E8AC71
KG94BIFH568AC71DJ32E
DJ32E8AC71IFH56KG94B
8AC71DJ32EKG94BIFH56
FI5HK69GB4JD238ECA17
69GB4FI5HKECA17JD238
JD238ECA17FI5HK69GB4
ECA17JD23869GB4FI5HK
H5IFG96KDJ4BE83271AC
96KDJH5IFG271AC4BE83
4BE83271ACH5IFG96KDJ
271AC4BE8396KDJH5IFG
5HFI9GK6JDB48E2317CA
GK6JD5HFI9317CAB48E2
B48E2317CA5HFI9GK6JD
317CAB48E2GK6JD5HFI9
A346IC2BKF7EDGH18J95
C2BKFA346I18J957EDGH
7EDGH18J95A346IC2BKF
18J957EDGHC2BKFA346I
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.