OBM 1984 Problem 6
There is a piece on each square of the solitaire board shown except for the central square. A move can be made when there are three adjacent squares in a horizontal or vertical line with two adjacent squares occupied and the third square vacant. The move is to remove the two pieces from the occupied squares and to place a piece on the third square. (One can regard one of the pieces as hopping over the other and taking it.) Is it possible to end up with a single piece on the board, on the square marked ?
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Dataset text AI-MO AoPS. Quoted with source.
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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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