A Split Bet or Cheval in French Roulette is an Inside Bet on 2 numbers which pays out pays 17 to 1. It’s called an Inside Bet (others include the Square Bet, the Straight Up Bet and the 6 Line Bet), because you make it “inside” the number grid on the betting table.
Your odds of winning the bet on a European Roulette table is 18.5:1 and 19:1 on an American Roulette wheel (the difference being the house edge). Make this bet by placing your chip along the line between 2 numbers. The numbers need to be adjacent on the table, obviously, for you to be able to make a Split Bet.
In the example above, we have placed split bets on 22/23, 22,25 and 16/19. You couldn’t make a split bet on 27/28 as they are not adjacent on the table.
If you place one split bet on a European Roulette Wheel, you have a 2:37 chance of winning (5.4%) On an American Roulette Wheel, your odds are 2:38 for each split bet or 5.26%).
Split Bet Roulette House Edge
The House Edge on this bet is the same as it is for the other main roulette bets: 5.26% for American Roulette (2 zero pockets) and 2.63% in a single zero European Roulette Wheel. Many of the Call Bets use Split Bets and Single Number Bets to cover the required numbers with less chips, so for example the Orphelins Bet uses split bets on 6/9; 14/17; 17/20 and 31/34.
Voisins du Zero uses splits as follows: 1 on the 4/7 split 1 on 12/15 split 1 on 18/21 split 1 on 19/22 split
Other call bets that use split bets include most of the Finales a Cheval bets (although some just use straight up bets). The Number Combo bet is another example- a variant on the simpler Chip Bomb. High Rollers will use Split Bets when they are making up a Complete Bet.