Sudoku 20x20 num: 235 (Level: hard)
G
I
1
9
8
4
H
J
C
5
1
E
7
7
5
1
3
H
J
B
G
5
A
E
K
D
B
8
G
F
6
G
E
2
A
1
B
F
G
3
7
5
1
7
3
J
7
5
2
C
G
9
3
B
8
6
K
7
2
1
I
9
E
H
J
5
F
C
D
7
D
1
I
5
H
E
K
F
7
D
9
H
H
4
3
B
F
1
I
6
K
J
H
8
D
1
F
C
G
C
I
4
8
B
6
K
1
G
7
2
B
H
4
6
2
F
9
7
B
K
8
J
F
6
K
J
1
E
H
1
C
8
I
D
3
4
K
8
1
6
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9B8GF34HJ6CI51AEKD27
EKD27CI51A34HJ69B8GF
CI51AEKD279B8GF34HJ6
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68BFG43JH975IA1KE2DC
KE2DC75IA143JH968BFG
75IA1KE2DC68BFG43JH9
HJ34B869EKGF7CD21AI5
869EKHJ34B21AI5GF7CD
GF7CD21AI5HJ34B869EK
21AI5GF7CD869EKHJ34B
JH438B96KEFGC72DA15I
B96KEJH438DA15IFGC72
FGC72DA15IJH438B96KE
DA15IFGC72B96KEJH438
IDG6352F9417EBHACK8J
52F94IDG63ACK8J17EBH
17EBHACK8JIDG6352F94
ACK8J17EBH52F94IDG63
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.