PlaySudoku.us
Hard · Puzzle #413
4
5
8
1
4
2
3
4
1
2
8
8
1
9
4
3
7
8
7
3
5
7
8
9
2
2
1
Euler's "problème des 36 officiers" — an unsolvable 6×6 Latin square — is a direct mathematical precursor to Sudoku.
Euler's "problème des 36 officiers" — an unsolvable 6×6 Latin square — is a direct mathematical precursor to Sudoku.
"Tell me and I forget. Teach me and I remember. Involve me and I learn." — Benjamin Franklin
"Tell me and I forget. Teach me and I remember. Involve me and I learn." — Benjamin Franklin