Sudoku 20x20 num: 220 (Level: hard)
J
G
2
7
A
6
5
I
3
J
G
5
C
5
1
9
K
2
7
4
A
6
D
I
B
9
5
A
2
G
7
A
8
5
1
3
9
A
D
6
J
K
G
1
3
9
H
C
8
F
9
J
K
7
6
3
8
2
E
G
K
J
E
4
A
H
6
3
1
2
H
G
4
8
6
D
F
6
B
9
K
J
A
C
H
B
1
2
7
C
J
E
G
J
H
5
9
B
4
7
K
A
3
6
I
8
6
5
3
G
4
C
B
D
F
8
2
8
E
4
G
K
2
J
K
B
C
G
9
I
H
6
9
F
C
G
1
3
5
6
JEGK274A6DCH58FI31B9
74A6DJEGK2I31B9CH58F
CH58FI31B9JEGK274A6D
I31B9CH58F74A6DJEGK2
EJKG72A4D6HC85IF139B
2A4D6EJKG7F139BHC85I
HC85IF139BEJKG72A4D6
F139BHC85I2A4D6EJKG7
GKJE4A27CH6DFI58B931
A27CHGKJE48B9316DFI5
6DFI58B931GKJE4A27CH
8B9316DFI5A27CHGKJE4
KGEJA472HCD6IF859B13
472HCKGEJA59B13D6IF8
D6IF859B13KGEJA472HC
59B13D6IF8472HCKGEJA
3562J18D7EBFC4G9IHAK
18D7E3562J9IHAKBFC4G
BFC4G9IHAK3562J18D7E
9IHAKBFC4G18D7E3562J
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.