The "no hole card" game format in blackjack involves the dealer not receiving a face-down card, presenting only one visible card to players. This variation changes the dynamics of the game, as players make decisions based solely on the dealer's upcard without the uncertainty of a hidden card. Often used in online settings or certain casinos, this format speeds up gameplay and can reduce the house edge. While it may instill more confidence in players since they are reacting to only one visible card, it can also encourage more cautious play, as the dealer's potential to bust is influenced solely by that upcard.