New answers tagged engines
0
1...c5 initiates the Sicilian Defense. It is absolutely a respectable opening, and I am surprised you've never seen it before. I'll just quote Wikipedia:
The Sicilian is the most popular and best-scoring response to White's first move 1.e4. Opening 1.d4 is a statistically more successful opening for White because of the high success rate of the Sicilian ...
1
Any answer to the question will be as dangerously biased as the database behind it, and moreover Stockfish will have other opening "reasons" than a human (I play 100% c5, and that even without knowing theory...), but here are some values from the database behind the Lichess analysis board, as number of games and white win-white loss:
c5 - Sicilian ...
7
Do you know instances of chess books explicitly rewritten years later by the same author, this time with computer-analysis aid? Preferably with the author telling the amount of errors found.
No. This doesn't happen. Why would it? There is nothing to be gained by this.
What does happen with a few old books with good reputations that were written using ...
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add Fairy Stockfish to that list... a recent development
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This has been done by Maia, a human-like neural network chess engine that's been trained to play like a human would.
Note that each Maia plays at a level above the rating range it was trained on, for an interesting reason: Maia’s goal is to make the average move that players at its target level would make. Playing Maia 1100, for example, is more like ...
1
Simulating realistic human play of a given level by computer is an open problem. My impression (being an interested layperson) is that it is a problem that is attracting some amount of attention constantly, but that the amount of engineering effort that has gone into trying to solve it is orders of magnitude lower than that spent on designing strong chess ...
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I think this is due, at least in part, to the horizon effect.
I first used Stockfish 14 with depth 20 (in Lucas Chess).
After 1. d5 cxd6 2. cxd5 Bxd5 3. Bf5 Nb6 4. Bxf6+ Ke8 5. Bg6+ Kf8 6. Rf7+ Kg8 7. Rg7+ Kf8, Stockfish 14, using depth 20, rates Rc7 best, at +7.45, with the line
Rc7 Kg8 9. Rg7+ Kf8 10. Re7 Bc6 11. Rc7 Kg8 12. Bf5 Bd5 13. Bd4 h5 14. Bxh8 ...
30
50 points sounds huge, but there actually is no meaningful difference between -6.4 and -62 in such an endgame.*
6.4 is more or less "Black has a queen for a bishop (but I haven't found a way to make progress yet)"
62 on the other hand is "I have found that way to a position that is 100% won (but I haven't found a forced mate yet)"
Why ...
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This sounds like a bug. Using Lichess's analysis engine, it takes Stockfish 14 less than ten seconds to find a mate in 11 moves. Both 1...Kg3 and 1...g1=Q lead to mate in 11.
So there should be no difference in which move you start with, even objectively (of course as a human I'd go 1...g1=Q without thinking).
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