Sudoku 20x20 num: 294 (Level: hard)
6
1
J
7
4
2
3
D
2
1
I
H
G
3
K
B
9
9
H
G
5
1
4
H
3
D
K
F
J
7
8
5
C
4
K
C
4
2
6
D
3
B
F
I
G
6
C
4
7
D
F
8
1
1
5
6
C
I
E
4
C
K
B
1
8
D
2
I
A
I
E
G
J
K
D
H
9
E
4
J
B
1
6
8
6
5
B
9
E
G
H
1
5
4
D
H
2
F
D
3
5
4
C
K
G
H
2
J
C
5
H
A
C
5
G
F
J
3
1
2
J
H
A
C
5
I
4
1
I
B
4
5
F
2
6
D
4
1
A
C
5618CJ74A2KBEF9IHG3D
J74A25618CIHG3DKBEF9
KBEF9IHG3D5618CJ74A2
IHG3DKBEF9J74A25618C
6581JC472ABKFEI9GHD3
C472A6581J9GHD3BKFEI
BKFEI9GHD36581JC472A
9GHD3BKFEIC472A6581J
185674CJKBA29IEF3DHG
4CJKB18567F3DHGA29IE
A29IEF3DHG185674CJKB
F3DHGA29IE4CJKB18567
816547JCBK2AI9FED3GH
7JCBK81654ED3GH2AI9F
2AI9FED3GH816547JCBK
ED3GH2AI9F7JCBK81654
HEAC5GF2J639K71DIB48
GF2J6HEAC5DIB4839K71
39K71DIB48HEAC5GF2J6
DIB4839K71GF2J6HEAC5
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.