Sudoku 20x20 num: 249 (Level: hard)
D
3
6
C
E
9
7
A
D
F
E
F
E
4
3
5
6
K
9
C
E
2
D
H
H
4
A
5
6
I
9
2
7
A
6
2
9
F
I
2
1
4
5
6
8
I
E
5
6
3
D
H
1
4
C
2
G
3
F
D
J
I
B
K
9
E
7
B
D
1
5
A
3
C
7
G
B
K
A
3
F
J
H
5
3
F
E
B
4
F
C
J
1
A
G
B
6
I
9
7
8
H
J
A
5
4
2
I
F
C
J
8
6
3
J
7
C
D
B
I
J
8
4
1
F
A
H
7
C
D
9
F
A
8
E
B
I
H
5
1
1JDH435A6KCFEI298B7G
35A6K1JDH498B7GCFEI2
CFEI298B7G1JDH435A6K
98B7GCFEI235A6K1JDH4
J1HD34A5K6FCIE92B8G7
4A5K6J1HD32B8G7FCIE9
FCIE92B8G7J1HD34A5K6
2B8G7FCIE94A5K6J1HD3
DH1J5A43CF6K29EI7G8B
A43CFDH1J5I7G8B6K29E
6K29EI7G8BDH1J5A43CF
I7G8B6K29EA43CFDH1J5
HDJ1A534FCK692IEG7B8
534FCHDJ1AEG7B8K692I
K692IEG7B8HDJ1A534FC
EG7B8K692I534FCHDJ1A
8E641BIK3J72C5DG9FAH
BIK3J8E641G9FAH72C5D
72C5DG9FAH8E641BIK3J
G9FAH72C5DBIK3J8E641
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.