A 6-deck H17 Spanish 21 has a house edge of 0.78%, however the house edge of S17 Spanish 21 is only 0.38%, and H17 with redoubling is 0.42%.ĮOR is why card counting works. Some Blackjack games have house edge of less than 0.5% how much exactly depends on the rules. This means removing certain cards impacts the house edge by a lot. There are two primary reasons: a low house edge, and high-magnitude EoR (Effect of Removal). Let’s briefly review why some Blackjack games are beatable by card counting. In theory, Spanish 21 without the special bonuses is countable by traditional methods, but you would need an enormous spread. That is a lot and if you’re trying to play to an advantage. Tens are good for the player, by taking four ten-value cards out per deck gives the house an additional 2% edge. Most APs would recoil with horror, and shake their head at anyone playing the game. You also likely know that it’s essentially Blackjack minus the tens, with very liberal rules. Most of you would have certainly seen the casino game Spanish 21 as you’ve ventured through casinos moving in and out of the Blackjack games searching for high count game.
