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Is there an online analysis engine that allows you to enter a PGN and get a game analysis, showing where suboptimal moves were made?

I know there are programs for download/purchase that do this, but I specifically want an online one. The ones I've found (e.g.) can analyze positions, but not entire games.

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  • If you do this, the amount of CPU attention devoted to your position will be variable, and perhaps not enough to find a high quality solution.
    – Tony Ennis
    Commented Jan 4, 2014 at 14:34
  • I want this apps please because of its triks
    – user2734
    Commented Mar 23, 2014 at 11:52

7 Answers 7

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lichess.org has played game analysis and allows you to edit a board before AI game.

Its analysis shows wrong and right moves and percentage statistics of mistakes for both sides.

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  • But it doesn't seem possible to enter an existing game for analysis, only ones you've actually played on that site. Or am I missing something?
    – TKR
    Commented Dec 29, 2013 at 23:52
  • If PGN contains moves, you can copy it. If it's not, I can just sorry. Happy New Year)
    – neochar
    Commented Jan 1, 2014 at 8:50
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You can import your game on http://lichess.org/paste, then analyse it.

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http://analyse.deep-chess.de/ allows you to analyze your game online with different chess engines.

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  • there is no way to enter PGN there, right? FEN is more than unclear...
    – vak
    Commented Jun 9, 2014 at 8:20
  • btw, you can use some online PGN to FEN converter.
    – Shashwat Kumar
    Commented Apr 23, 2015 at 6:54
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    As of today, this site is dead.
    – Unihedron
    Commented Jun 19, 2015 at 7:20
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http://analysis.cpuchess.com/ analyses your game with an option of a variety of engines like houdini and stockfish

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I recently found that chess.com also has a free option to analyze an entire game (by pasting a PGN), although paid accounts can analyze in more detail.

https://www.chess.com/analysis-board-editor (right panel, second tab)

The analysis process will intercalate comments idicating better moves if necessary. In the end, you will see a summary like this:

Strength        White   Black
-----------------------------
Excellent          41   38
Good               13   13
Inaccuracy (?!)     1    5
Mistake (?)         2    0
Blunder (??)        0    0
Forced              0    0
Best Move       66.7%    50.9%
Avg. Diff        0.14    0.19
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Here You can ask even very deep analysis, possibly also for whole games.

https://sites.google.com/site/distributedchess

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You may want to download this free Creatica chess game analyzer for Windows for your pgn games http://chessgame-analyzer.creatica.org/ Just right click on your pgn file and choose "Analyze with Stockfish". The result will be opened in your default pgn GUI; for example, in SCID vs PC or Chessbase.

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  • Welcome to Chess Stack Exchange. You must state explicitly in your post that this is your own product: see How not to be a spammer.
    – Glorfindel ♦
    Commented May 16, 2017 at 6:54
  • 1
    Oh, and another thing: the question asks for an online solution, which this answer doesn't provide.
    – Glorfindel ♦
    Commented May 16, 2017 at 7:42

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