Surebets (also called Arbitrage betting) is a betting system used to cover all outcomes and make a profit regardless of Outcomes. (for example, a tennis or football game). Suppose (for tennis) one bookie offers odds 2.05 on the first player, and another bookie offers odds 2.05 on the other player. If you bet € 100 on both players, you will get back € 205 regardless of the outcome with a total profit of € 5. However, note that different bookies may have different rules for sports. (eg tennis). This situation makes your risk-free bet no longer risk-free. Another trap is that you may not be allowed to bet the amount you want with one bookie, so make sure to keep the bets at a reasonable level. Read the rules of the game before you make your bets.