PE-MO 2016 Problem 2
How many dominoes can be placed on a at least board, such so that it is impossible to place a , , or tile on what remains of the board?
Clarification: Each domino covers exactly two squares on the board. The chips cannot overlap.
Dataset text AI-MO AoPS. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
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