Bet the fraction of bankroll that maximizes the long-run growth rate of your money — the size that compounds an edge fastest without ever risking ruin. It scales with the edge and shrinks with the odds; with no edge, it is zero.
The game grades every round with k, your bet divided by that round's Kelly bet: a pass scores 0, the optimal bet scores 1, a bet into a negative edge scores below 0, and anything past 2 is in the region where growth turns negative. The end-of-game charts bucket your k's — a tight cluster around 1, with passes on the trap rounds, is the mark of a disciplined bettor.
Growth per round across every bet size, 0–100% of bankroll. The blue dot is the Kelly bet; past the red intercept the same edge loses money.