By Liana B. Baker SAN FRANCISCO, July 28 (Reuters) - Red-hot New Zealander Lydia Ko is a force whenever she tees it up in a tournament but the world number one is far from a shoo-in for gold in women's golf in Rio where, unlike on the men's side, the top players will be competing. Ko has won two major championships on the LPGA Tour in the last 12 months and finished no worse than a tie for third in the other three, a remarkable level of consistency that suggests she will be on the medal podium. South Korea will have the biggest representation of all competing nations with four players ranked inside the top nine, but the vagaries of golf and the depth of international talent in the women's game make confident predictions difficult. More...