I'm looking for a site that provides well-annotated openings, giving at least the first 15-20 moves of major openings and allowing me to explore their main variations and lines (by clicking on the relevant moves on an online chessboard).

For example, if I am learning Queen's Gambit Declined, I'd expect it to display something along the lines of this (more detailed and expertly annotated, of course, and with a diagram)

1. d4 A popular opening move, which gives White a solid position. 1. ... d5 Black's reply is quite common, and preserves the symmetry of the situation. 2. c4 This is the Queen's gambit - if accepted, it can provide White great momentum and development. 2. ...e6 Black turns down the gambit and prefers to keep the position interesting. 2. ...dxc4 is not really got for Black as White can get the pawn back soon by [sequence of moves] followed by a bishop move.

And if I play 2. ...c6, I'd expect something like this (but again more detailed and with a diagram to help.)

2. ...c6 This changes the opening to the Slav defense.

My question

Is there any site online that provides detailed, annotated openings at least 15-20 moves deep and allows me to explore variations and lines (also annotated)?


The site needn't focus on other parts of the game. I'm focusing on the opening for now.

1 Answer 1


Wikibook Chess Opening Theory has similar aims but I don't think it quite meets all of your requirements. Still, it's the website closest to meeting them that I can think of, so I hope it helps. Being a wiki, it's still evolving and of course one can always wonder about the expertise of the authors.

  • Interesting, I'll look into it. What do you think about ChessGames.com? Nov 22, 2017 at 16:42
  • Thanks, it is indeed the closest to what I need. Plus, I found Chess Position Trainer, which helps too. I've accepted and upvoted your answer! Nov 26, 2017 at 14:28
  • @HarryWeasley, thanks and sorry I missed your other question. I use chessgames.com to look up historical games but I'm not a member. As far as I can tell, their opening tool lets you see the statistics but has no annotations, unless there's something else in the members-only area that I haven't seen.
    – itub
    Nov 26, 2017 at 15:26
  • I looked it up, and I think they provide some kind of in-depth opening analysis (called 'Opening Laboratory' or 'Position Laboratory' or something) for premium members, but not for non-premium members. Thanks again, the Wikibook helps rather well! Nov 26, 2017 at 17:27

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