Yamashita san,
About your question, I think that the answer is yes.
AlphaZero Symmetries seems successfully saturated.
That means that 20b neural network with symmetries has a capacity to learn at
most 21M full games.
If you let the network to learn 21M full games without preprocessing inputs fo
Yamashita san,
Go version in AlphaZero 2017 finished the training in 34 hours according to
Table S3.
And it looks like AlphaZero Symmetries in AlphaZero 2018 finished the training
in the same time according to Figure S1.
So I think that the authors had adopted AlphaZero Symmetries in 2017 paper