odds
odds(0, 0, 0);
odds(abs(b - i), 0, abs(board[b]));
odds(0, 0, 0);
odds(j, 0, 1);
odds(k, j - k, 1);
odds(0, 0, 0);
void odds(int, int, int);
odds(k, diff - k, addon);
odds(diff, 0, addon);
odds(0, 0, 0);