|Casinos across the US are experimenting with a new blackjack rule to beat “semi-counters” – players that don’t count cards per se, but will keep a feel for how the cards are falling in a single deck game, making educated guesses as to how many 10s and aces are in the deck. The downside for regular players is that the odds aren’t as attractive as they were, according to Andrew N.S. Glazer, author of 'Casino Gambling the Smart Way.'|
The new 6/5 rule increases the house percentage by about 1%. Normally, a blackjack game offers 3-2 odds for a dealt blackjack (a $15 payoff on a $10 bet) (an ace and any 10-point card). But the new 6-5 rule will offer a $12 payoff on a $10 bet for a dealt blackjack.
The new rule is used for many single-deck games, where card-counting - even after viewing only a dozen cards from the deck – is easier than in multi-deck games. Casinos have not implemented the rule in multi-deck games, where it is more difficult for card-counters to reach significant counts.
However, the single-deck games are popular, and floormen who can spot card counters are rare, says Glazer, hence the increasing use of the 6/5 rule.