Notation to place (or move) tiles by corner cell

[trevorld]

• Domino tiles
• Piecepack tiles
• Chess/checker boards

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• Helpful for placing domino and piecepack tiles without needing to switch to Cartesian locations.
• Maybe box-drawing glyphs like ┌ to mean "upper left cell" with ASCII back-up |-. Might be visually confused with an L.
• Might be easiest to implement this as a "move" which can be tacked on after placements
• For small pieces do nothing