Yes, it seems really odd that they didn't add a plane of all ones. The "heads" have weights that depend on the location of the board, but all the other layers can't tell the difference between a lonely stone at (1,1) and one at (3,3).
In my own experiments (trying to predict human moves) I found that 3 inputs worked well: signed liberties, age capped at 8, all ones. I think of the number of liberties as a key part of the game mechanics, so I don't think it detracts from the purity of the approach, and it's probably helpful for learning about life and death. Álvaro. On Thu, Oct 19, 2017 at 7:42 AM, Gian-Carlo Pascutto <g...@sjeng.org> wrote: > On 18-10-17 19:50, cazen...@ai.univ-paris8.fr wrote: > > > > https://deepmind.com/blog/ > > > > http://www.nature.com/nature/index.html > > Another interesting tidbit: > > The inputs don't contain a reliable board edge. The "white to move" > plane contains it, but only when white is to move. > > So until AG Zero "black" learned that a go board is 19 x 19, the white > player had a serious advantage. > > I think I will use 18 input layers :-) > > -- > GCP > _______________________________________________ > Computer-go mailing list > Computer-go@computer-go.org > http://computer-go.org/mailman/listinfo/computer-go >
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