PlaySudoku.us
Expert · Puzzle #50
1
4
5
7
2
1
2
7
9
3
8
1
9
5
1
4
2
8
2
9
6
9
3
2
5
8
8
Techniques used
- Hidden Single
- Naked Pair
- Naked Single
- Box-Line Reduction
- Simple Coloring
- XY-Chain
"To ask the right question is harder than to answer it." — Georg Cantor
"To ask the right question is harder than to answer it." — Georg Cantor
"The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience." — Immanuel Kant
"The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience." — Immanuel Kant