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 Ruy Lopez, generally called the Spanish Game outside of English speaking countries, is named after the 16th century Spanish priest Rúy López de Segura. He made a systematic study of this and other openings in the 150-page book on chess Libro del Ajedrez written in 1561 (which also included some more esoteric and what some would consider unfair suggestions, such as setting up the board so the sun shines in one's opponent's eyes).
However, although it is named after him, this particular opening was known earlier; it is included in the Göttingen manuscript, which dates from 1490. Popular use of the Ruy Lopez opening did not develop, however, until the mid-1800s when Jaenisch, a Russian theoretician, "rediscovered" its potential.
The opening is still in active use as the double king's pawn opening most commonly used in master play; it has been adopted by almost all players at some point in their careers and many play it from both the white and black sides.
According to Chessbase, white chances are about 58%
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