The round robin is a 3 selection wager consisting of 10 bets: 3 doubles, 1 2️⃣ treble and 3 up-and-down single stakes about pairs.
This is an any to come if-cash bet that can be thought of 2️⃣ as a Trixie with 3 up-and-down single stakes about pairs added, also very similar to a patent. Each choice appears 2️⃣ in 2 up-and-down SSA bets, 2 Doubles and a Treble. Should any single selection lose, the returns can change drastically. 2️⃣ Try out different outcomes with the round robin calculator, as it can help with understanding how winnings change given different 2️⃣ permutations.
One or more winning selections will guarantee a return from the round robin, one of the main advantages over a 2️⃣ Trixie bet. The disadvantage is that a larger stake is required to cover the 6 additional bets.