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tuxiano | 5 years ago

There are a lot of engines with rating on the chart way higher than the best humans, so every suggestion on their part should be in theory enough to overcome any human opponent. In practice most (if not all) of the players rely on Stockfish and Lc0 (both open source). During a game, most of the time the "best" move is easily agreed on by every reasonable engine on any decent hardware. Only in few cases during a game, the position offers two or three or more playable choices. In these cases a stronger hardware or a longer thought rarely makes the computer change his idea. It's a sort of horizon effect where more power doesn't translate into a really better analysis.

For example in a given position you could have 3 moves M1 - a calm continuation with a good advantage M2 - an exchange sacrifice (a rook for a bishop or a knight) for an attack M3 - a massive exchange of pieces entering into a favorable endgame. If the three choices are so different, the computer usually can't dwell enough to settle on a clear best move. Instead the human can evaluate the choices until one of them shows up as clearly best (for example the endgame can be forcefully won). In these cases the computer suggestion becomes almost irrelevant and only a naive player would make the choice on some minimal score difference (that can unpredictably vary on hardware, software version or duration of analysis). So the quality of the starting suggestion is somehow irrelevant if you plan to make a thoughtful choice.

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