45     unsigned short solved_element;  member
71             printf(" %d", b[row * BOARD_DIM + col].solved_element);  in print_board()
84             if (b[row * BOARD_DIM + col].solved_element)  in print_potential_board()
85                 printf("  %4d ", b[row * BOARD_DIM + col].solved_element);  in print_potential_board()
99         b[i].solved_element = b[i].potential_set = 0;  in init_board()
104         b[i].solved_element = arr[i];  in init_board()
116         if (b[i].solved_element == 0)  in fixed_board()
123         if (c != col && b[row * BOARD_DIM + c].solved_element == p)  in in_row()
130         if (r != row && b[r * BOARD_DIM + col].solved_element == p)  in in_col()
139             if (!(i == row && j == col) && b[i * BOARD_DIM + j].solved_element == p)  in in_block()
147         if (!b[i].solved_element) { // element is not yet fixed  in calculate_potentials()
161         if (success && b[i].solved_element) { // element is fixed  in valid_board()
163             if (in_row(b, row, col, b[i].solved_element) ||  in valid_board()
164                 in_col(b, row, col, b[i].solved_element) ||  in valid_board()
165                 in_block(b, row, col, b[i].solved_element))  in valid_board()
175         if (b[i].solved_element == 0 && b[i].potential_set == 0) // empty set  in examine_potentials()
179                 b[i].solved_element = 1;  in examine_potentials()
184                 b[i].solved_element = 2;  in examine_potentials()
189                 b[i].solved_element = 3;  in examine_potentials()
194                 b[i].solved_element = 4;  in examine_potentials()
199                 b[i].solved_element = 5;  in examine_potentials()
204                 b[i].solved_element = 6;  in examine_potentials()
209                 b[i].solved_element = 7;  in examine_potentials()
214                 b[i].solved_element = 8;  in examine_potentials()
219                 b[i].solved_element = 9;  in examine_potentials()
247         while (b[first_potential_set].solved_element != 0)  in partial_solve()
255                     new_board[first_potential_set].solved_element = potential;  in partial_solve()