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I've been told (but I don't understand) that it's a good idea to use a number of chess engine to analyze a chess opening. It this true? Why is this a good idea?)

  • What's your level? Analyzing chess opening to improve the existing theory is for master level and up, I'd say. – RemcoGerlich Feb 12 '17 at 23:01
  • I'm a master. I know that memorization of moves is foolish. I'm only using it to gain a better understanding of openings that are new to me. – ToddM Feb 12 '17 at 23:14
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    @ToddM: Your questions don't really suggest that you are at that level. See my reply in chess.stackexchange.com/questions/16615/… Chess engines have a very specific and limited use for opening preparation and you do need a lot of experience in both chess and in making sense of what the engine is telling you as engine evaluations can be very misleading in some positions. – user1583209 Feb 13 '17 at 1:03
  • Different engines might evaluate a position differently (because they put different weight to various factors). In any case this will be a very subtle effect and in most cases different engines will come to comparable results. Do you have the time to look at the evaluations of all those engines? – user1583209 Feb 13 '17 at 1:06
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    "I'm only using it to gain a better understanding of openings that are new to me" This is exactly what engines are NOT useful for. To learn a new opening, you'll want human explanations you can understand. The kind of advanced multi-engine prep you're talking about might be useful if you're a GM trying to get an edge on other GMs. – Nate Mar 17 '17 at 2:30
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Chess engines use heuristics, i.e. they look at a position several moves ahead, and quantitatively evaluate the position using some criteria (the most straightforward example is to just count the pawns and pieces). The move that leads to the position with the highest score, assuming best play (according to the engine's heuristics) from both sides is the engine's best move.

So the evaluation of the position depends on the choice of heuristics. Different types of positions are best described by different heuristics. Different engines use different heuristics. Therefore, in an opening where several types of positions could arise, different engines may have different opinions on what the best move is. (I haven't tried this myself, but I'd bet the top 5 chess engines won't agree on 1.e4, 1.d4 or 1.c4)

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I think that is someone's opinion. A few years ago (maybe more than few) I routinely beat some of the commercial chess engines. They are much better today, but facing a (skilled) human opponent is much more helpful. Although now a days, you're sure to get you butt handed to you if you play a quality engine on the most advanced levels.

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If you have no human opponent to study , you have to choose the engines . But Firstly, you have to recognize the engines weakness and strengths . Like if you analyse some routine openings , it will be a bad decision. A complicated position or something like that needs the engine. Secondly, Some engines also fail to find a clear path in the complex middle game or end games . Like I tried to analyse a game of Dragon variation(Sicilian defense) But engine failed to find immediately a right path(with Houdini 4 and Komodo 6). So, you can study with two engines ( not more than that because that's not going to helpful for your study) , but it sometimes never helpful .

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