PlaySudoku.us
Easy · Puzzle #463
8
9
3
5
2
1
7
6
8
4
2
6
8
5
3
6
5
9
1
4
3
1
2
7
3
5
6
7
3
9
7
3
1
2
5
9
6
9
5
7
2
5
8
9
3
4
Solving Sudoku is NP-complete for an n×n grid. For the standard 9×9, it's fast — but larger grids become exponentially harder.
Solving Sudoku is NP-complete for an n×n grid. For the standard 9×9, it's fast — but larger grids become exponentially harder.
Practice solving puzzles at a difficulty level where you succeed 90% of the time. That's the zone of maximum skill growth.
Practice solving puzzles at a difficulty level where you succeed 90% of the time. That's the zone of maximum skill growth.