switch, the dealer offers him the chance to hit, stand or double, firstly for the hand on the player's right-hand box, then for the one on the left. As in blackjack, a player hand which exceeds 21 is "bust"; its cards are removed and its backing wager acquired by the house. When all players have been consulted, the dealer plays out his hand according to blackjack-style drawing rules, with the difference that a dealer hand of 22 is not a bust but a push (a tie) against any surviving player hand; the only exception is a player blackjack which has not been obtained by switching or splitting. The small variations in dealer drawing rules between casinos which are found in blackjack are also found in Blackjack Switch, such as whether the dealer must stand or hit on soft 17 (a hand totalling 17 but containing an ace counted as 11. A-6 or A-3-3, for example), whether even money/insurance is offered, whether a player may double after a split, and whether a player may hit split aces. Strategy The strategy of Blackjack Switch covers both the switch decision and the subsequent decisions of whether to stand, double, or draw a further card which are familiar from blackjack strategy. The switch decision The correct decision regarding whether to switch is sometimes obvious, particularly when there is the largest difference in advantage. However, borderline and counter-intuitive cases are relatively common, and switching strategy is hard to summarize. While an often-quoted rule of thumb is to choose the option that forms or preserves the best single hand, this is unreliable; sometimes it is even correct to break up a natural by switching, for instance in the case AT + T[3-8] vs. dealer 7, 8 or 9. The correct switching choice depends on the dealer card in a significant minority of cases. Near-optimal schemes which can be learnt have been developed by several authors: Arnold Snyder presents a protocol for switching decisions based on four categories of hand, "winner", "push", "loser" and "chance" which he claims reduces the house edge to 0.25% under his ruleset. Cindy Liu presents a scheme based on assigning a point value to the dealt hands and those produced by switching. Basic strategy after the switch decision Basic strategy for playing out blackjack switch hands, after the switching decision has been made, is tabulated below, for a game in which the