I've been wondering about something I've seen in a few papers (AlphaGo's paper, Cazenave's resnet policy architecture), which is the presence of an input plane filled with 0s.
The input features also typically include a plane of 1s, which makes sense to me - zero-padding before a convolution means that the 0/1 demarcation line tells the CNN where the edge of the board is. But as far as I can tell, a plane of constant 0s should do absolutely nothing. Can anyone enlighten me?
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