SECRET BETS FOR THE BEAUTIFUL MIND By Monkeysystem Monkeysystem has been playing advantage blackjack recreationally for many years. Early in his career he used High-low and AOII, and then simplified things, switching to Knockout a few years ago and getting better results. He started playing tournaments in 2004 and has cashed in several. In this article he presents a new strategy – the use of Nash equilibriums - for maximizing your expectation in tournaments in which the bets in the final hand are secret. Excerpts are taken from Ken Smith’s article in the March 2009 Blackjack Insider, "Read Those Rules." In the March, 2009 edition of Blackjack Insider, Ken Smith gave a scenario for the final hand of a blackjack tournament at Harrah’s New Orleans in which the players had a secret bet. The Ultimate Blackjack Tour format includes a secret bet that can be used once in a tournament round. Secret bets have been around for a while, and they continue to be included in the formats of some blackjack tournaments. Casinos incorporating this format may be seeking to make their blackjack tournaments a little more like poker. Or, they may just be trying to make their game fairer, because secret bets eliminate last-hand position as a major factor in players’ chances of success in the tournament. For the serious player, it’s worthwhile to study strategy in this format. As previously stated, secret bets eliminate the advantage of having late position on the final hand, and eliminate the disadvantage of early position. The late position advantage stems from knowing the opponent’s betting decision and then reacting to it in the way that maximizes your probability of advancing. In a two-player match-up, all the player in early position can do is mitigate his disadvantage by leaving the lucky late position opponent the least attractive possible choices of strategy. With secret bets, neither player knows what his opponent will have bet. They wouldn’t even need to take turns betting; they could both write down their bets on paper and hand them to the dealer at the same time. The chip leader has the advantage and the chaser is at a disadvantage, but there is no effect of position on either player’s chances (unless the player in late position has discerned a tell that indicates what his opponent may have done.) Don’t worry ... I’ll distill the fairly complex analysis that follows into a Tools You Can Use section at the end of this article. Let’s use a classic two-player heads up situation for our analysis of the problems players typically face when there is a secret bet. One player has a chip lead of ¼ of a maximum bet: we’ll call him "Leader." The other is behind: we’ll call him "Chaser." Let’s also assume for now that neither player has discerned any tells or betting patterns that indicate a preference for one style of play. Both players seek to maximize their probability of success. The goals for Leader are prioritized as follows: 1. High-Low correlation, meaning Leader advances if both players get the same result on the hand, whether it’s winning (the high) or losing (the low.) His probability of advancing is about 70%. 2. Getting the low. His probability is about 56%. 3. Getting the high. This reduces the game to a 50-50 coin flip and is the least desirable outcome for Leader. The goals for Chaser are the reverse of Leader’s, and his percentages are 100% minus Leader’s in each scenario: 1. Getting the low. His probability is a 50-50 coin flip. 2. Getting the high. His probability is 44%. 3. Getting the high-low correlation. Chaser’s probability of winning in this scenario is reduced to 30% and is his least desirable outcome. A typical analysis of each player’s thought process in determining his secret bet size could go something like this... ...enter your member login information below to read this article/newsletter... Paid Members-Only ArticleYou have clicked on a link to a Blackjack Insider web page or article for paid subscribers. You must have a paid membership to the Blackjack Insider newsletter to view this content. About 1/2 of the articles in each issue of the Blackjack Insider are for paid members only, while the rest are viewable by everyone. Your purchased membership will allow you to read all Blackjack Insider articles for 12 months. Enter your user name and password below (they were listed and e-mailed to you after you purchased your Blackjack Insider membership):
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