Sudoku 20x20 num: 269 (Level: hard)
8
I
9
7
5
2
4
H
I
9
7
1
6
H
B
2
1
E
D
A
F
I
7
D
A
8
D
E
J
A
F
8
7
2
3
G
I
5
D
J
H
6
3
G
2
G
H
6
A
1
H
K
8
9
E
F
I
9
7
2
B
D
6
C
7
G
5
4
K
1
J
E
9
3
H
5
2
A
J
E
D
I
E
4
3
G
C
I
E
G
6
4
3
7
3
H
1
6
C
5
7
I
F
J
9
1
7
D
2
A
K
B
9
C
3
5
1
G
7
8
9
J
I
6
2
B
9
3
5
D
K
B
9
I
C
3
F
1
G
7
EDAJ8FI9752BG34K1C6H
FI975EDAJ8K1C6H2BG34
2BG34K1C6HEDAJ8FI975
K1C6H2BG34FI975EDAJ8
DEJAF89I57B23GK4C1H6
89I57DEJAF4C1H6B23GK
B23GK4C1H6DEJAF89I57
4C1H6B23GK89I57DEJAF
AJEDI98F2B754KG36H1C
98F2BAJEDI36H1C754KG
754KG36H1CAJEDI98F2B
36H1C754KG98F2BAJEDI
JADE9IF8B257K43GH6C1
IF8B2JADE9GH6C157K43
57K43GH6C1JADE9IF8B2
GH6C157K43IF8B2JADE9
1G78EC35FD642IAHKB9J
C35FD1G78EHKB9J642IA
642IAHKB9J1G78EC35FD
HKB9J642IAC35FD1G78E
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.