Question: A progressive parlay is a joint wager on multiple events, for example team sports or horse races, however, unlike a regular parlay, if some of the individual bets lose, but most win, the bettor still wins, although with a much smaller payout, what is called, an accumulator, or combo bet is a single bet that links together two or more individual wagers and is dependent on all of those wagers winning together?

<P0-S0> Oscar's Grind is a betting strategy used by gamblers on wagers where the outcome is evenly distributed between two results of equal value (like flipping a coin, betting on red or black in roulette, etc.). <P0-S1>  It is an archetypal positive progression strategy. <P0-S2>  It is also called Hoyle's Press. <P0-S3>  In German and French it is often referred to as the Pluscoup Progression. <P0-S4>  It was first documented by Allan Wilson in his 1965 book,"The Casino Gambler's Guide". <P0-S5>  This progression is based on calculating the size of bets so that in the event of a losing streak, if and when a same-length winning streak occurs, a profit is obtained. <P0-S6>  The main concept is that there are periods of many wins and periods of many losses. <P0-S7>  Losses and wins often come in streaks. <P0-S8>  Ideally, bets are kept low on losing streaks and increased on winning streaks, which hopefully will follow. <SEP> <P1-S0>  However, unlike a regular parlay, if some of the individual bets lose, but most win, the bettor still wins, although with a much smaller payout. <P1-S1> A progressive parlay is a joint wager on multiple events, for example team sports or horse races. <P1-S2>  Generally a progressive parlay involves a joint wager on four to twelve separate events. <P1-S3>  Should all the selected bets win, the bettor receives a relatively large payout, because of the sizable odds against this happening. <P1-S4>  Several sites use a schedule where the bettor can lose one bet on a 4-6 event progressive parlay, can lose up to two bets on a 7-9 event progressive parlay, and up to three bets on a 10-12 event progressive parlay. <SEP> <P2-S0>  The benefit of the parlay is that there are much higher payoffs than placing each individual bet separately since the difficulty of hitting it is much higher. <P2-S1>  If any of the bets in the parlay lose, the entire parlay loses. <P2-S2>  If any of the plays in the parlay ties, or "pushes", the parlay reverts to a lower number of teams with the odds reducing accordingly. <P2-S3> A parlay, accumulator, or combo bet is a single bet that links together two or more individual wagers and is dependent on all of those wagers winning together. <SEP> <P3-S0> In organized sports, point shaving is a type of match fixing where the perpetrators try to prevent a team from covering a published point spread. <P3-S1>  Unlike other forms of sports betting, spread betting invariably motivates point shaving. <P3-S2>  A point shaving scheme generally involves a sports gambler and one or more players of the team favored to win the game. <P3-S3>  In exchange for a bribe, the player or players agree to ensure that their team will not "cover the point spread" (i.e. the bribed player's team may still win, but by not as big a margin as predicted by oddsmakers). <P3-S4>  The gambler then wagers against the bribed team. <P3-S5>  Alternatively, an official (referee) of the game may be bribed, or even bet on his own behalf, so that one or more "close calls" will be called in favor of the "underdog" rather than the team favored to win.