function number_of_attacks = find_attacks_gen(A)
% finds thenumber of attacks for queens for the general case.
% The board does not have to be square shape, and the number of
% queens is arbitrary. If queens "P" and "Q" attacks each other,
% it counts for 1 attack, not 2.

    [a b]=find(A);
    number_of_attacks=0;
    for i=1:numel(a)-1  % N-1
        p1=a(i);
        q1=b(i);
        for j=i+1:numel(a)  % N
            p2=a(j);
            q2=b(j);
            if ((p1==p2) || (q1==q2) || abs(p1-p2)==abs(q1-q2))
                number_of_attacks=number_of_attacks+1;
            end
        end
    end
end