Same bet repetition on 1(or X or 2) on the same sport team. You'll chose one team that - on the statistics based on the historical outcomes in the past season - had the high amount of wins (or draws, or losses) with relatively high odds and you'll bet on them 1 (or X, or 2) under any conditions, depending on what you found in these statistics of the given team. When the tip will fail, you will have to invest the base investment * the calculated coefficient to have returned the base investment + the profit.
For example - take the team ABC. The last year statistics for this team show us that the teams' prevailing outcomes were draws (this could be typical for some teams of England Premier League). From the first match of this team you will place each your bet on the draw outcome of the match. You should omit not even one their match. Average odd for the draw is around 3.0 - 3.5. In this example we will calculate with average odd 3.20, that means that the mentioned coefficient will be around 1.45 .. That means, that if our first bet on the draw of our ABC team we will be- say - 100 MU(monetary units), then the net profit will be 220 MU (320-100).If the first match will not end with draw, we have to increase our next bet to the amount calculated this way - our first bet (100 MU in this case) multiplied by our coefficient (1.45). That means that our next bet will be 145 MU. If the outcome of this next match will end up with draw, we will win 145 * 3.2 = 464. Then - net profit = 464 - 100 - 145 = 219 (our coefficient 1.45 is not precise enough = 1 MU departure). If the outcome of this next match was not draw again, we have to multiply our last bet amount by our coefficient again => 145 * 1.45 ... and so on.
This system can be successfully applied even to non sport betting on Daily Index Lottery - one of the financial games of the GameBookers betting company. Daily Index Lottery is based on guessing - what digit will appear right after the decimal point of the close level of financial world index (GameBookers offer DAX, FTSE and DJIA in this game). This is real lottery, but there is a big probability - 1/10 and the odd on each digit is 9 (!). You can chose that you will bet on one of indices - 5 digits - chosen by some arbitrary criterion - say - even numbers (2,4,6,8,0). You will place the same amount of MU on each one of these 5 single bets. If the outcome will be one of our digits, we will get 9 * our investment on the winning digit (net profit is 80% of the whole invested amount). If the outcome will not be one of our digits, we have to multiply the amount of our bet by coefficient 2.25 ... and so on. Historical prices of the financial indices - finance.yahoo.com (FTSE), finance.yahoo.com (DAX), finance.yahoo.com (DJIA).
. The close time for these indices differs.