30kyu -&gt; 1kyu (amateur)<p>1dan -&gt; 9dan (amateur)<p>1dan -&gt; 9dan (pro abbrev. to 1p -&gt; 9p)<p>I think 8d ama can start to have competitive games with 1p or 2p... I mean they&#x27;re getting into the same ball-park in terms of strength but averaged out over time a rank above _will_ beat a rank below, that&#x27;s why they are in the ranks they are in after all :)