How does Kaspa decide which blocks earn a block reward?

Kaspa gates block rewards on a minimum accumulated blue score threshold, ensuring only sufficiently confirmed blocks receive newly issued coins. The difficulty window is a rolling set of recent blocks used to calibrate how hard mining should be — but tying rewards to simple membership in that window breaks down when the window is sampled rather than fully evaluated. Instead, Kaspa only pays rewards to blocks whose accumulated blue score meets or exceeds the lowest accumulated blue score observed within the current difficulty window. This matters to miners because the reward rule stays consistent and manipulation-resistant even as the network scales.