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I'm looking for some reference for the number of lookahead steps typically used by chess agents (Stockfish / Leela Chess Zero / others?)

From a quick search, I found that the answer depends on:

  1. complexity of position,
  2. computer hardware/processor speed,
  3. efficiency of software/graphics interface,
  4. time given to the chess engine.

With somewhat mediocre hardware, a depth around 15 ply's in one second is typical.

The NPS value for the Stockfish engine: 49,473 kN/s (calculating 49,473,000 positions (nodes) per second).

Source:

  1. https://www.quora.com/What-is-Stockfishs-depth-when-analysing-a-chess-position
  2. https://chessify.me/blog/nps-what-are-the-nodes-per-second-in-chess-engine-analysis
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    $\begingroup$ Note, the NPS value will not help you. These engines all prune heavily, and go much deeper than the NPS and tree size would suggest. $\endgroup$ Commented Dec 20, 2022 at 16:15

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