SHAFTDEBT: Every Ore Opens the Siege

SHAFTDEBT is an original true fine-pixel mine-to-magazine pathfinding defense puzzle. Every accepted cardinal dig performs two inseparable operations: it transfers one stable ore body into the dome's FIFO magazine, and it opens one exact rail edge for the Deep Maw. After the published dig budget, the Maw climbs that authored rail in reverse while the dome fires the ore bodies in their original mining order.

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