About Approach-Move Liberties (2009)
Liberties
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Consider the first diagram, Black has an eye ( |
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In the second diagram, White still has to play all the |
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By comparing both diagrams, we can see that the addition of an eye, not only adds a liberty in the eye itself ( |

) in the corner. To capture the Black stones, White must play on
, and
, before that. The points 
. Obviously, White still has to play the other two 

