Sudoku 20x20 num: 252 (Level: hard)
G
H
4
8
2
6
J
1
3
8
2
6
4
C
F
B
B
E
1
5
F
7
H
8
2
6
J
I
3
J
G
H
4
C
4
7
F
H
I
7
E
B
K
I
7
F
A
G
6
B
C
8
H
3
H
3
6
J
5
C
B
E
F
7
5
I
J
1
6
K
D
9
5
I
4
2
B
9
F
7
I
6
2
3
E
4
3
1
7
F
I
3
B
H
2
I
6
1
K
J
6
1
D
F
I
2
8
E
7
5
8
E
G
5
G
I
9
J
F
K
8
1
3
6
C
2
4
F
8
K
1
E
G
7
1
2
B
9
J
G
GAH4C3826JBED9K15IF7
3826JGAH4C15IF7BED9K
BED9K15IF7GAH4C3826J
15IF7BED9K3826JGAH4C
AG4H3C28J6EB9D1KI57F
C28J6AG4H3KI57FEB9D1
EB9D1KI57FAG4H3C28J6
KI57FEB9D1C28J6AG4H3
H4GA82C3BE6JK1D9F75I
2C3BEH4GA89F75I6JK1D
6JK1D9F75IH4GA82C3BE
9F75I6JK1D2C3BEH4GA8
4HAG283CEBJ61K9D7FI5
83CEB4HAG2D7FI5J61K9
J61K9D7FI54HAG283CEB
D7FI5J61K983CEB4HAG2
5D6CGI9J3AFKB8H71E24
I9J3A5D6CG71E24FKB8H
FKB8H71E245D6CGI9J3A
71E24FKB8HI9J3A5D6CG
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.