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polymathwannabe comments on AlphaGo versus Lee Sedol - Less Wrong Discussion

17 Post author: gjm 09 March 2016 12:22PM

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Comment author: ChristianKl 09 March 2016 04:58:53PM 0 points [-]

"I think move A is a 12 point swing, and move B is a 10 point swing, but move B narrows the search tree for future moves in a way that I think will net me at least 2 more points."

No. 2 points is a lot at that level. If the commentator would think a move cost 2 points he wouldn't call it conversative but he would call it an error.

Not playing out every move is more about keeping aji open and not wasting possible ko threads. Unfortunately I don't know how to translate aji into English.

Comment author: polymathwannabe 09 March 2016 07:11:48PM 0 points [-]

I understand aji as potential for future moves that is currently not too usable but may be after the board configuration has evolved.

Comment author: ChristianKl 10 March 2016 12:47:39PM 0 points [-]

It goes in that direction but moves don't have to be used directly to constrain movements elsewhere on the board.

When playing around with Fold.it there was a similar scenario. It's often possible to run a script to get a higher local maxima. However that made the fold more "rigid". The experienced folders did only run the script to search the local maximas at the end when they manually did everything that could be done. With my usage of Go vocabulary running the script to optimize locally beforehand would also be a case of aji-keshi.

Aji is for me a phenomological primitive that I learned while playing Go and that I can use outside of Go but which doesn't have an existing English or German word.

Comment author: Vaniver 10 March 2016 02:01:37AM *  0 points [-]

The way I think about aji is something fragile on a ledge--sure, it's safe now, but as things shift around, it may suddenly become unsafe.