Basak, I believe that 'Tiger' brindles are different than the ordinary brindles. when we were at one of our Boxer picnics last year with Sergeant a young couple came up to us and said 'we didn't think that we would see another Tiger brindle here today', they had one also and it turned out that they were both from the same breeder in B.C. The Tiger brindle doesn't have as many markings on the coat, Sergeant had a few chevron stripes on his back (which is why I think they call them Tiger) and a few darker markings on his legs, except for the left front leg which looked as if I had drawn a dark line down from the elbow to his paw. If you looked at him from the left side you could hardly see any brindle at all.
It may be different in Turkey as each country seems to have their own version. ie: red & fawn.