What's the best opening for beginners?

I would recommend playing openings your opponents might be bad at

Try the English opening. Easy to learn.

"... for those that want to be as good as they can be, they'll have to work hard.
Play opponents who are better than you … . Learn basic endgames. Create a simple opening repertoire (understanding the moves are far more important than memorizing them). Study tactics. And pick up tons of patterns. That’s the drumbeat of success. ..." - IM Jeremy Silman (December 27, 2018)
https://www.chess.com/article/view/little-things-that-help-your-game
"... For beginning players, [Discovering Chess Openings] will offer an opportunity to start out on the right foot and really get a feel for what is happening on the board. ..." - FM Carsten Hansen (2006)

https://web.archive.org/web/20140627114655/http://www.chesscafe.com/text/hansen91.pdf

Detailed suggestions are provided by Moret in his My-First-Chess-Opening-Repertoire books.

https://www.newinchess.com/media/wysiwyg/product_pdf/9033.pdf

https://www.newinchess.com/media/wysiwyg/product_pdf/9050.pdf

https://chessbookreviews.wordpress.com/tag/vincent-moret/

Opening Repertoire 1 e4 and Keep it Simple 1.e4 are somewhat similar sorts of books.

https://www.newinchess.com/media/wysiwyg/product_pdf/7819.pdf

https://www.newinchess.com/media/wysiwyg/product_pdf/9068.pdf

Openings for Amateurs by Pete Tamburro (2014) combines explanation of principles with starting opening suggestions. Of necessity, his opening descriptions are less detailed (than those of Moret) because he tried to offer choices to the reader and give some indication of how a player might choose what to try.

http://kenilworthian.blogspot.com/2014/05/review-of-pete-tamburros-openings-for.html

https://chessbookreviews.wordpress.com/tag/openings-for-amateurs/

https://www.mongoosepress.com/catalog/excerpts/openings_amateurs.pdf

Some players may not like the idea of relying on the limited selection of an author. It is a pretty daunting project to try to learn a little bit about a lot of openings, but, if one wants more freedom to make choices, it would make sense to look at a book like Yasser Seirawan's Winning Chess Openings.

https://web.archive.org/web/20140627132508/http://www.chesscafe.com/text/hansen173.pdf

While reading such a book, don't forget that the primary purpose is to get help with making choices. Once one has chosen openings, I think that there is wide agreement that the way to start is by playing over sample games. Some of us think that it can be useful to use books like First Steps: 1 e4 e5 and First Steps: Queen's Gambit

https://www.newinchess.com/media/wysiwyg/product_pdf/7790.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/7652.pdf

as sources of games with explanations intended for those just starting to learn about an opening. Be sure to try to use the openings in games in between sessions of learning. Most of the time, one faces a position with no knowledge of a specific move indicated in a book. One has to accept that as part of chess, and think of opening knowledge as a sometimes helpful aid. After a game, it makes sense to try to look up the moves in a book and see if it has some indication of how one might have played better in the opening. Many opening books are part explanation and part reference material. The reference material is included in the text with the idea that one mostly skips it on a first reading, and looks at an individual item when it applies to a game that one has just played. Resist the temptation to try to turn a book into a mass memorization project. There are many important subjects that one should not neglect because of too much time on opening study.

https://www.chess.com/article/view/learning-an-opening-to-memorize-or-understand
https://www.chess.com/article/view/3-ways-to-learn-new-openings
https://www.chess.com/article/view/how-to-understand-openings

"... Overall, I would advise most players to stick to a fairly limited range of openings, and not to worry about learning too much by heart. ..." - FM Steve Giddins (2008)

"... I feel that the main reasons to buy an opening book are to give a good overview of the opening, and to explain general plans and ideas. ..." - GM John Nunn (2006)

"... If the book contains illustrative games, it is worth playing these over first ..." - GM John Nunn (2006)

"... the average player only needs to know a limited amount about the openings he plays. Providing he understands the main aims of the opening, a few typical plans and a handful of basic variations, that is enough. ..." - FM Steve Giddins (2008)

"... Everyman Chess has started a new series aimed at those who want to understand the basics of an opening, i.e., the not-yet-so-strong players. ... I imagine [there] will be a long series based on the premise of bringing the basic ideas of an opening to the reader through plenty of introductory text, game annotations, hints, plans and much more. ..." - FM Carsten Hansen (2002)

https://web.archive.org/web/20140627055734/http://www.chesscafe.com/text/hansen38.pdf

"The way I suggest you study this book is to play through the main games once, relatively quickly, and then start playing the variation in actual games. Playing an opening in real games is of vital importance - without this kind of live practice it is impossible to get a 'feel' for the kind of game it leads to. There is time enough later for involvement with the details, after playing your games it is good to look up the line." - GM Nigel Davies (2005)

"... Review each of your games, identifying opening (and other) mistakes with the goal of not repeatedly making the same mistake. ... It is especially critical not to continually fall into opening traps – or even lines that result in difficult positions ..." - NM Dan Heisman (2007)

https://web.archive.org/web/20140627062646/http://www.chesscafe.com/text/heisman81.pdf

Various items of possible interest:

"There is no such thing as a 'best opening.' Each player should choose an opening that attracts him. Some players are looking for a gambit as White, others for Black gambits. Many players that are starting out (or have bad memories) want to avoid mainstream systems, others want dynamic openings, and others want calm positional pathways. It’s all about personal taste and personal need.

For example, if you feel you’re poor at tactics you can choose a quiet positional opening (trying to hide from your weakness and just play chess), or seek more dynamic openings that engender lots of tactics and sacrifices (this might lead to more losses but, over time, will improve your tactical skills and make you stronger)." - IM Jeremy Silman (January 28, 2016)

https://www.chess.com/article/view/opening-questions-and-a-dream-mate
https://www.chess.com/article/view/picking-the-correct-opening-repertoire
http://chess-teacher.com/best-chess-openings/
https://www.chess.com/blog/TigerLilov/build-your-opening-repertoire
https://www.chess.com/blog/CraiggoryC/how-to-build-an-opening-repertoire

"... A typical way of choosing an opening repertoire is to copy the openings used by a player one admires. ... However, what is good at world-championship level is not always the best choice at lower levels of play, and it is often a good idea to choose a 'model' who is nearer your own playing strength. ..." - FM Steve Giddins (2008)

https://www.chess.com/article/view/the-perfect-opening-for-the-lazy-student
https://www.newinchess.com/media/wysiwyg/product_pdf/9035.pdf
https://web.archive.org/web/20140627110453/http://www.chesscafe.com/text/hansen169.pdf
https://www.newinchess.com/media/wysiwyg/product_pdf/9029.pdf
https://www.chess.com/article/view/has-the-king-s-indian-attack-been-forgotten
https://www.newinchess.com/media/wysiwyg/product_pdf/7277.pdf
https://web.archive.org/web/20140627104938/http://www.chesscafe.com/text/hansen159.pdf

https://web.archive.org/web/20140627052905/http://www.chesscafe.com/text/hansen175.pdf
https://web.archive.org/web/20140627022042/http://www.chesscafe.com/text/hansen153.pdf

"... Once you identify an opening you really like and wish to learn in more depth, then should you pick up a book on a particular opening or variation. Start with ones that explain the opening variations and are not just meant for advanced players. ..." - Dan Heisman (2001)

https://web.archive.org/web/20140626180930/http://www.chesscafe.com/text/heisman06.pdf

"... To begin with, only study the main lines ... you can easily fill in the unusual lines later. ..." - GM John Nunn (2006)

"... For inexperienced players, I think the model that bases opening discussions on more or less complete games that are fully annotated, though with a main focus on the opening and early middlegame, is the ideal. ..." - FM Carsten Hansen (2010)

"... I think people tend to be afraid of the main lines. They think: ... sure, I'm going to take up (say) 5 Bg5 against the Semi-Slav, once I've got time and learned it properly. ... My advice is - don't bother. The more you learn anyway, the more you'll recognize how little you know. ... 5 Bg5 is a good move - get it on the board, get ready to fight, and see what happens.

Sure, there will come a time, whether on move two or move twenty, when your knowledge of theory runs out and you have to decide what to do on your own. ... sometimes you will leave theory first, sometimes your opponent. Nothing will stop this happening. It happens in every well-contested GM game at some point, usually a very significant point. This is a part of the game: an important part, something you have to get better at. ... to improve you have to challenge yourself; ..." - IM John Cox (2006)

"... 'Journey to the Chess Kingdom' ... is primarily intended for children ... Chapter five deals with opening principles, while chapter six provides an overview of the most popular chess openings. Importantly, the emphasis is on giving insights and explaining ideas and principles as opposed to advocating mindless memorization of long lines. ..." - WGM Natalia Pogonina (2014)

https://www.chess.com/blog/Natalia_Pogonina/book-review-quotjourney-to-the-chess-kingdomquot

Opening Principles:

1. Control the center squares – d4-e4-d5-e5
2. Develop your minor pieces toward the center – piece activity is the key
3. Castle
4. Connect your rooks

Tactics...tactics...tactics...

The objective of development is about improving the value of your pieces by increasing the importance of their roles. Well-developed pieces have more fire-power than undeveloped pieces and they do more in helping you gain control.

Now we will look at 5 practical things you can do to help you achieve your development objective.

They are:

1. Give priority to your least active pieces.

• Which piece needs to be developed (which piece is the least active)
• Where should it go (where can its role be maximized)

2. Exchange your least active pieces for your opponent’s active pieces.
3. Restrict the development of your opponent’s pieces.
4. Neutralize your opponent’s best piece.
5. Secure strong squares for your pieces.

Don’t help your opponent develop.

There are 2 common mistakes whereby you will simply be helping your opponent to develop:

1. Making a weak threat that can easily be blocked
2. Making an exchange that helps your opponent to develop a piece

Pre Move Checklist:

1. Make sure all your pieces are safe.
2. Look for forcing moves: Checks, captures, threats. You want to look at ALL forcing moves (even the bad ones) as this will force you look at, and see the entire board.
3. If there are no forcing moves, you then want to remove any of your opponent’s pieces from your side of the board.
4. If your opponent doesn’t have any of his pieces on your side of the board, then you want to improve the position of your least active piece.
5. After each move by your opponent, ask yourself: "What is my opponent trying to do?"

Try out the London system or the Kings Indian attack for white and the Scandi and the London System for black.

as white, practice the queens gambit declined and accepted, and as black the Sicilian against e4

The more comfortable you get with them and the more you learn them the better game you can play. https://www.chessable.com/opening-book/im-john-bartholomews-1d4-repertoire-for-white/102/

Around 2010, IM John Watson wrote, "... For players with very limited experience, ... the Sicilian Defence ... normally leaves you with little room to manoeuvre and is best left until your positional skills develop. ... I'm still not excited about my students playing the Sicilian Defence at [the stage where they have a moderate level of experience and some opening competence], because it almost always means playing with less space and development, and in some cases with exotic and not particularly instructive pawn-structures. ... if you're taking the Sicilian up at [say, 1700 Elo and above], you should put in a lot of serious study time, as well as commit to playing it for a few years. ..."
In 2012, IM Greg Shahade wrote, "... These days ....c5 is more popular than ....e5, so who's to say that the lessons learned in e5 are somehow more valuable? It was by far the most popular opening in the past, but it's no longer the case. The lessons in the Sicilian, as irrational as they may seem to a relative newcomer, are very important to learn and who's to say that this type of action packed/dynamic chess is not just as good a way to start as the more classical style of chess. I definitely think that playing only 1.e4 e5 until 2000 is way too harsh a restriction in today's world of chess that is so much more than just classical 1.e4 e5 openings. That's not to say it's bad to play only 1.e4 e5 until 2000, but I think it's incorrect to assume that this is the proper way to approach chess development." Around the same time, he did acknowledge, "I specialize at teaching players who aspire to be pretty strong...like at least 2200, and usually higher, so I'm less skilled at helping 1500-1600 players without any particular ambitions to become great at chess".
In 2014, Pete Tamburro wrote, "... You will see [in Openings for Amateurs] the reply to 1.e4 to be the great reply of the open games with 1...e5. The Sicilian Dragon is presented as an alternative. ... I have found that scholastic players take to the Sicilian Dragon very quickly. ... A cautionary note: the Dragon is good at club level, but as you start facing better players you're going to find yourself memorizing tons of lines and the latest analysis, ... From my experience with coaching players below 1800, you won't need to do that too much. ..."

"... For players with very limited experience, I recommend using openings in which the play can be clarified at an early stage, often with a degree of simplification. To accomplish this safely will take a little study, because you will have to get used to playing wiith open lines for both sides' pieces, but you can't eliminate risk entirely in the opening anyway. ... teachers all over the world suggest that inexperienced players begin with 1 e4. ... You will undoubtedly see the reply 1 ... e5 most often when playing at or near a beginner's level, ... After 2 Nf3, 2 ... Nc6 will occur in the bulk of your games. ... I recommend taking up the classical and instructive move 3 Bc4 at an early stage. Then, against 3 ... Bc5, it's thematic to try to establish the ideal centre by 4 c3 and 5 d4; after that, things can get complicated enough that you need to take a look at some theory and learn the basics; ... Of course, you can also play 1 d4 ... A solid and more-or-less universal set-up is 2 Nf3 and 3 Bf4, followed in most cases by 4 e3, 5 Be2 and 6 0-0. I'd rather see my students fight their way through open positions instead; however, if you're not getting out of the opening alive after 1 e4, this method of playing 1 d4 deserves consideration. ... a commonly suggested 'easy' repertoire for White with 1 Nf3 and the King's indian Attack ... doesn't lead to an open game or one with a clear plan for White. Furthermore, it encourages mechanical play. Similarly, teachers sometimes recommend the Colle System ..., which can also be played too automatically, and usually doesn't lead to an open position. For true beginners, the King's Indian Attack and Colle System have the benefit of offering a safe position that nearly guarantees passage to some kind of playable middlegame; they may be a reasonable alternative if other openings are too intimidating. But having gained even a small amount of experience, you really should switch to more open and less automatic play." - IM John Watson in a section of his 2010 book, Mastering the Chess Openings, Volume 4

Don't move....😁😁😁😁

When opponent is stupid, it's okey.

It gives you a chance.

Trexler, 8.... Rook e8  for Blacks

And what will Whites make further !? )))

My favorites are the Sicilian defense and Italian game.

Mine now is Scandinavian defense. But I consider myself an beginner of course too.

Italian game is almost always the catastrophe for me.

I lose it as rule.