how many combinations in four horse box
The Trifecta Box. 1  A three horse box at $1 betting units involves 6 combinations. 2  A four horse box at $1 betting units involves 24 combinations. 3  A five horse box at $1 betting units involves 60 combinations. The Trifecta Fan. The Trifecta Fan is so named because the bet structure fans out from the pin position to the show position. The first version of this bet structure involves using two Key Horses in the win spot, with two, three, four or more other horses in the place position with two, three, four or more horses in the show position. The Trifecta Fan gives a horseplayer a lot of coverage at a reasonable cost. The Fan should be ...