It looks like there's no more month without news from Google Deepmind... This time again, this is quite stunning!
AlphaZero would have been able to beat (crush) the most recent version of Stockfish, that is also the world champion program and of course the free engine well known by correspondence chess players.
But most important is that actually AlphaZero would have outperformed Stockfish after only 4 hours of training (if I understood well), while it took 8 hours to outperform AlphaGo Lee and only 120 minutes to outperform Elmo at Shogi! However it seems much much harder for the neural program to improve at chess after this stunningly fast auto-learning.
100 games played (25 wins & 25 draws with white! 3 wins with black... no loss, either with white or black, which is an incredible performance)
All details available (must read) here:
https://arxiv.org/pdf/1712.01815.pdf
The Berlin Defence is logical and solid, although it can be hard for Black to generate winning chances. Arthur Bisguier played this line for decades, and it was later taken up by Alexei Shirov and other young grandmasters. Vladimir Kramnik used the Berlin Defence as a drawing variation against Garry Kasparov in their 2000 World Championship match.
After 4.0-0, Black can play either the solid 4...Nxe4 or the more combative 4...Bc5. After 4...Nxe4 5.d4 (5.Re1 Nd6 6.Nxe5 is also reasonable) Nd6 6.Bxc6 dxc6 7.dxe5 Nf5 8.Qxd8+ (8.Qe2?! Nd4! 9.Nxd4 Qxd4 favors Black. After 10.Rd1, Bg4!? 11.Rxd4 Bxe2 gives Black a pleasant endgame.) Kxd8 White is usually considered to have a small advantage in light of his somewhat better pawn structure and Black's awkwardly placed king, but Black, with a solid position and the bishop pair, has excellent drawing chances.
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I am 54 years old, married, born and living in Prague - the capital of the Czech Republic. I have been playing CC since 1995. Since 2012, I have held the position of President of the Czech CCA. I got these CC/ICCF titles: IM (2005), SIM (2009) and GM (2011). My current CC/ICCF rating is 2604.