ShiftSum

Rotate numbered register rings until one or more columns equal the target checksum, then route the whole alignment at once.

Use up and down to select a circular register ring, then shift it left or right one position. Every column displays its live sum. When a column reaches the target checksum, leave it aligned—or keep working until several columns are ready—and press Space to route them together.

Five finite banks add wider rings, extra lanes, higher targets, and tighter shift budgets. The input is deterministic, the route is yours, and a patient alignment can turn one commit into a full-bank chain.