Blackjack
White's 21 is paid at 2:1, which means that white receives double and a half the amount of chips white bet for one of the splits, however white loses the other half of chips bet on the 16 which is beaten by the dealer's 17. Most games do not pay 2:1 for a hand of 21 however. The strongest scoring 21 would be an ace card and any other 10-point card. You can actually get to 21 in many different ways, but the ace and 10-point card combination will beat those variations.