Currently the diagram control is not documented.
For example we can take game of Lee Sedol
Select this icon 
Basic url http://gokifu.com/b/1z1.png
For example let’s show first moves 1-20 Fuseki 😉
s=1 (start from first move) e=20(end move )
http://gokifu.com/b/1z1.png?s=1&e=20
Diagram from move 51
http://gokifu.com/b/1z1.png?s=51
mark moves only from 60 to 70
http://gokifu.com/b/1z1.png?s=60&e=70
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Hi, thanks for the great site.
It looks like the s= and e= parameters don’t work well with handicap stones — they seem to change the numbering if handicap stones are present. Am I mistaken?
Thanks!