Blackjack rules with all 10s removed. Player edge moves — bonus payouts compensate.
Spanish 21 is blackjack with all the 10s removed (jacks, queens, kings stay). That sounds devastating for the player, but the rules are loosened to compensate: late surrender is allowed, doubles can be redoubled, doubling after split is allowed, splits to 4 hands, hit/double on split aces, and bonus payouts on 21s built from 5/6/7+ cards or specific triples like 7-7-7.
With optimal play, house edge is 0.4% — actually slightly LOWER than standard blackjack. The catch: optimal play is harder. The basic strategy chart is denser because the deck composition shifts (no 10s changes the math on every hit/stand decision).
Spanish 21 is mostly found in Vegas casinos and a few regional spots. If you're a card counter, this game requires a different system than standard blackjack — most counting systems weight 10s heavily, and there are none here.
Strategy notes
Get a Spanish 21 strategy card before you sit down — the standard blackjack chart will lose you money. Key differences: stand on 16 vs dealer's 7+ (stand more aggressively due to the missing 10s), double on 11 against ANY dealer card, surrender on 16 vs A.