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AlphaZero (Computer) vs Stockfish (Computer)
AlphaZero - Stockfish Match (2018), London ENG, Jan-18
Queen's Indian Defense: Traditional Variation (E17)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Dec-18-18  Albion 1959: I would rather watch twelve consecutive draws as in the recent Carlsen - Caruana match than play through a game like this!
Apr-23-19  rainingpieces: Funny ending, 50-move-rule
Apr-23-19
Premium Chessgames Member
  AylerKupp: Another example that AlphaZero did not seem to use tablebases in its matches with Stockfish even though Stockfish supposedly did in this second 1000-game match. The position was a theoretical draw after 165.Qxc2 per the 7-piece Lomonosov tablebases and also after 165...Nxf4+. The latter would have been detectable by both AlphaZero and Stockfish if they had used 6-piece Syzygy tablebases; they've been available since at least Stockfish 7 in 2016.

But I suppose that using tablebases does not enhance AlphaZero's chess-playing approach reputation in any way since they provide access to pre-calculated results instead of using AlphaZero's training and game playing evaluations. I think that using tablebases would enhance AlphaZero's play since MCTS as used in AlphaZero plays uses the results of the playouts to determine the scoring probability ( (no. of wins + number of draws/2) / total number of games) of the moves being investigated. Using tablebases would provide the most accurate results rather than relying on random moves or thresholding.

But it would also depend on the circumstances under which a position would be adjudicated as a draw. Applying the 50-move rule would be one of them, but reaching a theoretically drawn position should have been another. Maybe the problem was with the GUI used?

Apr-23-19
Premium Chessgames Member
  keypusher: < AylerKupp: Another example that AlphaZero did not seem to use tablebases in its matches with Stockfish even though Stockfish supposedly did in this second 1000-game match. The position was a theoretical draw after 165.Qxc2 per the 7-piece Lomonosov tablebases and also after 165...Nxf4+. The latter would have been detectable by both AlphaZero and Stockfish if they had used 6-piece Syzygy tablebases; they've been available since at least Stockfish 7 in 2016.>

SF definitely had tablebases for the 1000 game match and A0 definitely did not. But DeepMind continued games in TB positions, either because they wanted to see how A0 would do or because they were indifferent.

For A0 not playing as well as a tablebase, see Stockfish vs AlphaZero, 2018

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