PlaySudoku.us
Evil · Puzzle #844
4
6
8
5
3
2
3
1
8
7
2
7
5
1
5
8
6
9
1
9
8
6
2
4
Techniques used
- Naked Single
- Hidden Single
- Naked Triple
- Pointing Pair
- Naked Pair
- Box-Line Reduction
- XY-Chain
- Forcing Chains
"In science there is only physics; all the rest is stamp collecting." — Ernest Rutherford
"In science there is only physics; all the rest is stamp collecting." — Ernest Rutherford
X-Wing: if a digit appears in exactly two cells in two rows, and those cells share the same two columns, eliminate that digit from those columns elsewhere.
X-Wing: if a digit appears in exactly two cells in two rows, and those cells share the same two columns, eliminate that digit from those columns elsewhere.