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from this link you can download all horse racing results in csv begening will be year 2000 to the end of 2018.
1- look at all races with locations (istanbul izmir etc), race groups ("handikap" or "maiden" etc ) race distance (1200m 1400m), race type (grass or sand) from history 2000-2018 and make a list of it with all details. when we select this 4 conditions from list system will shows us;
a)the winner horse back number (max winner horse),
b)a list of all winners with all details
c)best degree winner in race.