The game rules are the same as a standard game 
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of 501 darts. You must score points to reduce your 
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remaining score from 501 to zero in as little darts 
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as possible. You must also checkout on a double 
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or the bullseye.
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To throw your darts press the blue button located 
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in the top right hand corner of the board  (or press 
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the space bar). You must press the button twice. 
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Once for the horizontal co-ordinates and once for 
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the vertical co-ordinates.