Blackjack is the casino game with genuine strategy. You and the dealer are dealt cards; face cards count ten, aces count one or eleven, and you want to get closer to 21 than the dealer without going over. The dealer must follow fixed rules, which is what makes optimal play calculable.
That calculation is 'basic strategy' — a known best decision for every combination of your hand and the dealer's visible card. Learn it and the house edge shrinks to well under one percent. This version is played with virtual chips only.
The mathematically best decision for every combination of your hand and the dealer's up card. Following it reduces the house edge to well under 1% — the largest effect any player decision has in a casino game.
Yes. A pair of aces played as one hand is a weak 12; split, each ace starts a strong hand. A pair of eights is 16 — the worst total in the game — and two hands starting at 8 are far better.
No — this is a free browser version with virtual chips, no deposits and no payouts.