But when calculating deeply it is amazing what Leela can do. But, same with AlphaZero, decisions about the course of action are taken quite early, and there’s always the chance for the neural network to miss an unusual move or a tactic early in the calculation tree. Matthew Sadler: In all fairness, Leela’s calculation is stunning as well. The more concrete calculation is required, the more Stockfish shines. Leela did very well in King’s Indian and French type structures, essentially in any position with a locked center and play on both wings. On the other hand, the range of positions in which Leela can actually hurt Stockfish has become somewhat greater. This time Stockfish was absolutely lethal in open Sicilians, essentially in every open position in which king safety is a factor. There were some games in which one engine was killing it while the other looked helpless, and that happened to both sides. Matthew Sadler: The contrast in styles, the contrast of the positions in which they excel, how they are both extremely strong while managing to expose each other’s weaknesses – fantastic. You followed the 100 games closely and tweeted frequently. Matthew Sadler’s YouTube Channel The superfinal between Leela and Stockfish is over. Together with Natasha Regan he wrote Game Changer: AlphaZero’s Groundbreaking Chess Strategies and the Promise of AI (New in Chess 2019). He retired from professional chess when he was 25 and a top 50 player. Matthew Sadler is an English grandmaster and consultant specializing in IT architectures and infrastructures.
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