org/guru/boggle/Board.java


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package org.guru.boggle;

import java.util.List;

public interface Board {
    void reset();

    char letterAt(BoardPosition p);

    void markUsed(BoardPosition p);

    void clearUsed(BoardPosition p);

    boolean isUsed(BoardPosition p);

    List<BoardPosition> adjacentNeighborPositions(BoardPosition p);

    List<BoardPosition> adjacentUnusedNeighborPosition(BoardPosition p);
}