No, you cannot bet on just one horse for the entire Showdown. Here’s what you need to know:

1. Selection Requirement

   • One Horse per Leg: You must select one horse for each leg.
     
     

2. Single Horse per Leg

   • Individual Selections: Only one horse can be chosen for each individual leg.
     
     

3. Complete Entry

   • Full Selections: All legs must have a runner selected. Entries with missing selections are not valid.
     
     

4. No Multiple Selections

   • Single Choice: You cannot choose multiple horses for a single leg.
     
     

5. Strategy Consideration

   • Best Selection: Focus on making the best single selection for each leg.
   • Individual Focus: Consider each leg individually when making your choices.
     
     

Remember, the challenge of the Showdown is to make separate selections, one for each leg of the competition. 

Its a Showdown, The Ultimate Punters Challenge.