There have been casino books written about how to win at blackjack but at the end of the day all you can do is maximise your chances of winning at this ever popular online casino card game; the house always has a slight edge over the player due to the fact that the player has to play first and if he or she goes over 21 or busts then the bank wins regardless of what might happen later in the hand. Armed with this knowledge it is clear that when playing online casino blackjack you should avoid going over 21 where possible and play your cards accordingly. Online casinos will generally say that the objective of blackjack is to get as close as possible to 21 without exceeding 21 but in actual fact we at casinos.ie have a slightly different interpretation as we think the object of the game is to beat the dealer and you can do that comfortably with a hand of 15 or 16 if the dealer goes bust. The only clue as to whether the blackjack hand of the dealer is likely to go bust is the dealer card that is visible and we know that the dealer will draw to 16; we also know that approximately 30% of the cards have a value of ten which rises to 38% if the 9 is included. Taking this a step further we can deduce that if the dealer is showing a 6, there is a 38% chance that the final two cards will be showing 15 or 16 and the blackjack dealer will draw to this hand; if it is 16 there is approximately a 61% chance of the blackjack hand exceeding 21 on the next card and if it is 15 that reduces but is still a healthy 54%. There are no certainties when playing online casino blackjack but you can improve your chances by watching what is happening and using some simple maths..