Core Tower of Pisa tips
- Track the bottom cards first; those are the only cards you can move directly.
- When a move opens an empty column, plan two steps ahead so the top-placement rule helps instead of scrambling order.
- Avoid burying your smallest needed rank under a larger blocker if it is likely required for the final tower.
- Build stable partial runs and protect them until you can merge into a single column.
- If several moves are legal, prefer the move that increases future legal targets for your current source piles.