Nie wiem czemu ale mam gdzieś błąd w algorytmie, który rozwiązuje zadane sudoku i nie umiem go znaleźć. O to mój algorytm:
#include <iostream>
using namespace std;
bool mozliwe(int tab[9][9], int i, int j, int k){
for(int a = 0; a < 9; a++){
if(k == tab[i][a] || k == tab[a][j]) return false;
}
i /= 3;
j /= 3;
i *= 3;
j *= 3;
for(int m = i; m < i + 3; m++)
for(int n = j; n < j + 3; n++)
if(tab[i][j] == k) return false;
return true;
}
void solver(int tab[9][9], int k, int l){
if(k == 8 && l == 8) return;
else{
for(k; k < 9; k++){
l %= 9;
for(l; l < 9; l++){
if(tab[k][l] != 0) continue;
for(int m = 1; m < 10; m++){
if(mozliwe(tab, k, l, m)){
tab[k][l] = m;
solver(tab, k, (l + 1) % 9);
tab[k][l] = 0;
}
}
}
}
}
}
int main(){
int sudoku[9][9] = {{0,6,0,7,5,0,0,0,3},
{0,0,0,0,3,8,0,0,2},
{9,0,0,0,0,6,0,0,0},
{6,0,0,5,0,7,0,0,0},
{8,0,0,0,0,0,0,1,0},
{3,0,0,1,0,0,2,0,7},
{0,0,0,0,0,0,0,0,5},
{0,0,7,9,0,0,0,6,0},
{0,9,0,6,0,0,0,0,0}};
solver(sudoku, 0, 0);
for(int i = 0; i < 9; i++){
for(int j = 0; j < 9; j++)
cout << sudoku[i][j];
cout << endl;}
}
C++ 
