contract KingOfEthAuctionsAbstractInterface {
    /// @dev Determines if there is an auction at a particular location
    /// @param _x The x coordinate of the auction
    /// @param _y The y coordinate of the auction
    /// @return true if there is an existing auction
    function existingAuction(uint _x, uint _y) public view returns(bool);
}
/// @title King of Eth: Auctions Abstract Interface
/// @author Anthony Burzillo <burz@burznest.com>
/// @dev Abstract interface contract for auctions of houses
function existingAuction(uint _x, uint _y) public view returns(bool);

/// @dev Determines if there is an auction at a particular location
/// @param _x The x coordinate of the auction
/// @param _y The y coordinate of the auction
/// @return true if there is an existing auction