Blackjack

A chart is a model with assumptions. Dealer rules, permitted actions and information timing determine whether its recommendations even apply.

Why a face-down dealer card, a blackjack check and the treatment of additional wagers must be understood as separate rules.

A hand’s history can affect its classification. Learn why an ace and ten after a split may be ordinary 21 rather than a natural.

Insurance settles on the dealer’s blackjack, not on every possible loss. A simple expected-value example explains the distinction.

Worked examples show how an ace changes a blackjack total and why a displayed 17 alone does not explain the dealer’s next action.