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Oscar's grind
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.). It is an archetypal positive progression strategy. It is also called Hoyle's Press. In German and French it is often referred to as the Pluscoup Progression. It was first documented by Allan Wilson in his 1965 book,''The Casino Gambler's Guide''. 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. The main concept is that there are periods of many wins and periods of many losses. Losses and wins often come in streaks. Ideally, bets are kept low on losing streaks and increased on winning streaks, which hopefully will follow.
==Description==
Oscar's Grind divides the entire gambling event into sessions. A session is a sequence of consecutive wagers made until 1 unit of profit is won. Each session begins by betting 1 unit, and ends by winning 1 unit of profit. If the gambler loses, the session continues and the bet is repeated. Each time the gambler wins the game following a lost game, the bet is increased by 1 unit. This increase is not performed if the current bet warrants achieving at least 1 unit of profit in total, in case the next game is won. On the contrary, the bet size in such a situation should be decreased to assure exactly 1 unit is won. Given infinite money and time, this makes sure that every session ends with a 1 unit profit.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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