Mathematical Mind

"What is a proof? It is a demonstration that a statement is necessarily true — a guarantee that no exception can exist." — Henri Poincaré

Mathematical Mind

"What is a proof? It is a demonstration that a statement is necessarily true — a guarantee that no exception can exist." — Henri Poincaré

4 8 3 7 3 4 3 1 6 5 2 8 6 4 7 9 3 7 5 8 6 1 3 1 2 4 8 9 6 8 5 3

PlaySudoku.us

Medium · Puzzle #687

✓ Completed! 👍

4

3

8

7

3

1

6

3

4

5

2

8

6

3

7

5

4

7

8

9

6

1

3

1

2

9

6

8

5

4

8

3

00:00

Pro Tip

Scan by digit rather than by cell: find everywhere '7' must go before switching to '8'.

Pro Tip

Scan by digit rather than by cell: find everywhere '7' must go before switching to '8'.