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Stockfish is a strong open-source chess engine.

4 votes

Why is Stockfish giving me this weird move?

Qxh6 is not particularly difficult to find for an engine or even a human, but stockfish might miss it, if it is severely crippled. … So in order to find Qxh6, your stockfish would need to: look ahead at least 6 moves be aware of the possibility of perpetual check If any of these is not satisfied, it would try to find the second …
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4 votes
Accepted

Why does black not move Queen here?

Nf5 ...Qh7, Nd6+ (discovered attack) wins the queen. Note that any other attempts to save the queen fails: Nb4 or Nce7 or Nge7 or Nf6 with the idea to attack the white queen fail because Nxg7+ is ch …
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1 vote

Custom chess (game) engine

I am not aware of any such thing existing. To some extent it is possible to program an engine that can take custom rules. However, naturally, you would have to decide beforehand on what kind of cust …
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48 votes
Accepted

Why does Stockfish undervalue pawns when compared to the classical "a piece is worth three p...

Check out the middlegame evaluation function for stockfish. … Stockfish has a much more fine grained evaluation function than we humans do. The pure piece value from stockfish cannot really be compared with the human piece value. …
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34 votes
7 answers
20k views

Hardware used in AlphaZero vs Stockfish match

I understand that AlphaZero has to use a different kind of hardware than regular Stockfish. I would expect that the hardware has a large effect on engine strength. … Specifically I read that people complain about: Stockfish being given only 1 GB of cache, and the time limit of 1 min/move (How would this disadvantage Stockfish?) …
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