function getFightRaces(uint _fightId) public view returns(uint[]) {
    Fight storage f = fights[_fightId];
    if (f.startedAt == 0) return;
    uint[] memory r = new uint[](f.raceCount);
    for(uint i; i < f.raceCount; i++) {
      r[i] = f.raceList[i];
    }
    return r;
  }