Go in Music

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Link to the the AGA songbook in this post:

James Kerwin's advice on getting to 10k, 1k and beyond

It may have to do with the ranking system used by the AGA in 2004, though I doubt it since this was already the 21st century. In the previous century, there was a clearer line between kyu and dan. For instance, in the '70s and '80s the British Go Association allowed its individual clubs to promote, without any control exerted by the national body, their members to any kyu rank the club management thought appropriate. However, to advance from first kyu to shodan required the permission of the …

https://www.usgo.org/sites/default/files/bh_library/AGA_Songbook.pdf