Looking for a Hikaru no Go fic (original) (raw)

I am looking for Watch and Learn & Trail and Error, however it is not to be found anywhere.

It is about Hikaru travelling back in time to redo everything again to let sai play as much go as he wants and on top of that Hikaru is very good at art. The only other details I can remember is that sai's hand is called yurei. It is not a yaoi fic, though it is slashable.

Is there anyone who knows where to find it OR is able to send me them via email, preferably both fics, or any HnG by the same author - sorry I can't remember the name - or a simular plot line?