Collect all 52 cards to win.
2. Slap
Double-tap the pile when you spot:
First valid slap takes the pile. Wrong slap? Lose one card to the pile.
3. Beat a face card
Play a J, Q, K or A within the allowed flips:
J: 1 · Q: 2 · K: 3 · A: 4
Play one to pass the challenge on. Miss, and the challenger takes the pile.