Hi, Thanks to you for taking care of CGOS.
I have just connected CrazyStone-57-TiV. It is not identical, but should be similar to the old CrazyStone-18.04. CrazyStone-18.04 was the last version of my program that used tensorflow. CrazyStone-57 is the first neural network that did not use tensorflow, running with my current code. So it should be stronger than CrazyStone-18.04, and I expect it will get a much lower rating. A possible explanation for the rating drift may be that most of the old MC programs have disappeared. They won easily against GNU Go, and were easily beaten by the CNN programs. The Elo statistical model is wrong when different kind of programs play against each other. When the CNN program had to get a rating by playing directly against GNU Go, they did not manage to climb as high as when they had the MC programs between them and GNU Go. I'll try to investigate this hypothesis more with the data. Rémi
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