Analyzing games with Let's Check
After demonstrating how Let's Check users contribute to the LiveBook for all the moves of a top game being broadcast, this brings to light another aspect of the Let's Check function: its use for game analysis.
Let's Check can not only be used to provide comprehensive analysis of recent games, but even of your own games by request.
Retrieving LiveBook analysis
Those following the broadcasts of the London Chess Classic with Let's Check running, know that many users have powerful systems displaying top-engine analysis at great depth that others can see. These analyses can surpass our own, and just as importantly, provide evaluations and variations of up to three different engines. All these analyses are stored in the LiveBook for later perusal, and can then be added to the game notation at any time.
Bear in mind, you can request LiveBook analyses your own game to retrieve evaluations of positions that have already been seen. You never know when you will discover that an opening or middlegame you played hasn't already been seen and contributed from another source.

The first thing to do is to have the game you want analyzed visible in the notation

Next connect to Let's Check through the Engine tab at the top

Switch to the Analysis tab and click on "Let's Check Analysis"

A pane will open with several options. Standard Analysis is the option you want. Leave
User Names checked to see the users who contributed the lines, and Include Text
Comments, if any were added. (Note: you can contribute your own as well)

The end result will look as above, with up to three variations for every move, including
the evaluations, depth, and the engine signing them.
Here is a sample of the Let's Check analysis done for Carlsen-Nakamura:
NB: The javascript replayer does not display the evaluation and depth, however below it is a link to download the PGN, to visualize in the program of your choice.

Replay and check the LiveBook here |
Please, wait...
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Bc5 5.c3 d6 6.Bb3 a6 7.Nbd2 Ba7 8.Nf1 h6 9.Ng3 0-0 10.0-0 Be6 11.h3 Qd7 11...d5 12.exd5 Nxd5 11...d5 12.exd5 Bxd5 11...d5 12.exd5 Nxd5 12.Be3 12.Be3 Bxe3 13.fxe3 12.Be3 Bxe3 13.fxe3 12.Bxe6 Qxe6 13.d4 12...Ne7 12...Bxe3 13.fxe3 Bxb3 12...Bxe3 13.fxe3 Bxb3 12...Bxb3 13.axb3 Bxe3 13.Nh4 13.d4 Bxb3 14.Qxb3 13.d4 exd4 14.cxd4 13.Bxa7 Rxa7 14.d4 13...Ng6 13...Bxb3 14.Qxb3 a5 13...Bxe3 14.fxe3 Nh7 13...a5 14.Bxe6 fxe6 14.Nhf5 14.Nxg6 fxg6 15.d4 14.Nxg6 fxg6 15.d4 14.Nxg6 fxg6 15.d4 14...Ne7 14...Bxe3 15.fxe3 Qd8 14...d5 15.Qf3 dxe4 14...Ne7 15.Nxe7+ Qxe7 15.Nxe7+ 15.Bxe6 fxe6 16.Nxe7+ 15.Bxa7 15.Nxe7+ Qxe7 16.Bxe6 15...Qxe7 15...Qxe7 16.Bxe6 fxe6 15...Qxe7 16.Bxa7 Rxa7 15...Qxe7 16.Bxa7 Rxa7 16.Bxa7 16.Bxe6 fxe6 17.Bxa7 16.Bxa7 Rxa7 16.Bxe6 fxe6 17.Bxa7 16...Rxa7 16...Rxa7 17.f4 Raa8 16...Bxb3 17.Qxb3 Rxa7 16...Rxa7 17.Bxe6 Qxe6 17.f4 17.Bxe6 fxe6 18.d4 17.f4 Raa8 18.Bxe6 17.Nf5 Bxf5 18.exf5 17...c5 17...Raa8 18.Bxe6 fxe6 17...Raa8 18.Bxe6 Qxe6 17...Raa8 18.Bxe6 fxe6 18.Bc2 18.Qf3 b6 19.Rf2 18.Bxe6 fxe6 19.f5 18.Bxe6 fxe6 19.fxe5 18...b5 18...b5 19.Qd2 Rd8 18...exf4 19.Rxf4 b5 18...Raa8 19.f5 19.Qd2 19.Qd2 Rc7 20.Rf2 19.Qf3 Re8 20.Rae1 19.Qd2 Rb7 20.Rf2 19...Rb7 19...Rc7 20.Rf2 Bc8 19...Rc7 20.Rf3 Rc6 19...Rb7 20.Rf2 exf4 20.a3 20.Rf2 Bd7 21.Raf1 20.Rf3 exf4 21.Rxf4 20.Rf3 20...a5 20...Rfb8 21.Rf2 20...a5 21.Rf3 b4 20...Rd8 21.Rf2 Nh7 21.Rf2 21.Rf2 b4 22.axb4 21.Rf2 b4 22.axb4 21.Rf3 b4 22.axb4 21...b4 21...exf4 22.Qxf4 b4 21...exf4 22.Rxf4 b4 21...b4 22.axb4 axb4 22.axb4 22.axb4 axb4 23.Raf1 22.Raf1 bxc3 23.bxc3 22.axb4 axb4 23.Raf1 22...axb4 22...axb4 23.Raf1 exf4 22...axb4 23.Raf1 bxc3 22...exf4 23.Rxf4 axb4 23.Raf1 23.Raf1 exf4 24.Rxf4 23.d4 bxc3 24.bxc3 23.c4 Rd8 24.Rff1 23...bxc3 23...exf4 24.Rxf4 bxc3 23...exf4 24.Rxf4 bxc3 23...bxc3 24.bxc3 exf4 24.bxc3 24.bxc3 exf4 25.Rxf4 24.bxc3 exf4 25.Rxf4 24.bxc3 exf4 25.Rxf4 24...exf4 24...exf4 25.Rxf4 Nh7 24...exf4 25.Rxf4 Nd7 24...exf4 25.Rxf4 Nd7 25.Rxf4 25.Rxf4 Nh7 26.d4 25.Rxf4 Nh7 26.d4 25.Rxf4 Nh7 26.Nf5 25...Nh7 25...Nh7 26.d4 Qg5 25...Nh7 26.d4 cxd4 25...Nd7 26.Nf5 Bxf5 26.d4 26.Nf5 Qc7 27.R4f2 26.Nf5 Bxf5 27.Rxf5 26.d4 Qg5 27.Qd3 26...cxd4 26...Qg5 27.Qd3 cxd4 26...cxd4 27.cxd4 Rc8 26...Qg5 27.Kh2 cxd4 27.cxd4 27.cxd4 Qg5 28.Kh2 27.cxd4 Rb2 28.Qc1 27.cxd4 Rb2 28.Qc1 27...Qg5 27...Qg5 28.Kh2 Rb2 27...Rb2 28.Qc1 Rb4 27...Qg5 28.Qd3 Qb5 28.Kh2 28.Qd3 Rb2 29.h4 28.Qd3 Rb2 29.h4 28.Kh2 Rb2 29.h4 28...Nf6 28...Rc8 29.Bd1 Rcc7 28...Nf6 29.Bd1 Ra8 28...Rc8 29.h4 Qe7 29.Bd1 29.Bd1 h5 30.h4 29.d5 Bd7 30.Qd4 29.Bd1 Ra8 30.h4 29...Rfb8 29...h5 30.h4 Qh6 29...h5 30.h4 Qh6 29...Ra8 30.h4 Qa5 30.h4 30.h4 Qg6 31.Rxf6 30.Qc3 Rc8 31.Qa3 30.Qc3 Ra7 31.h4 30...Qg6 30...Qg6 31.Rxf6 gxf6 30...Qg6 31.Rxf6 gxf6 30...Qg6 31.Rxf6 gxf6 31.Rxf6 31.Rxf6 gxf6 31.Rxf6 gxf6 32.d5 31.d5 Bd7 32.Qc3 31...gxf6 31...gxf6 31...gxf6 32.Qf4 Kh7 31...gxf6 32.Qf4 Rb6 32.Qf4 32.Qf4 Rb1 33.d5 32.d5 Rb2 33.Qf4 32.Qf4 Rb6 33.Rf2 32...Rb2 32...Rb1 33.d5 Bc8 32...Kh8 33.Bh5 32...Rb6 33.Rf2 Kh8 33.Bh5 33.Bh5 Qg7 34.Bf3 33.d5 Bc8 34.Bh5 33.Bh5 Qg7 34.d5 33...Qg7 33...Qg7 34.Bf3 Qg6 33...Qg7 34.d5 Bxd5 33...Qg7 34.d5 Bc8 34.Bf3 34.Bf3 Qg6 35.d5 34.d5 Bxd5 35.exd5 34.Bf3 Qg6 35.d5 34...Ra8? 34...Qg6 35.d5 Bc8 34...Qg6 35.d5 Bc8 34...Rd8 35.Ra1 Rc2 35.d5+- 35.d5 Bc8 36.Nh5 35.Nh5 Qg6 36.d5 35.d5 Bc8 36.Nh5 35...Bc8 35...Kh8 36.dxe6 fxe6 35...Bc8 36.Nh5 Qg6 35...Bc8 36.Nh5 Qg6 36.Nh5 36.Nh5 36.Nh5 Qg6 37.Qxd6 36.Nh5 Qg6 37.Nxf6+ 36...Qf8? 36...Qg6 37.Qxd6 Rxg2+ 36...Qg6 37.Nxf6+ Kg7 36...Qg6 37.Nxf6+ Kg7 37.Nxf6+ 37.Rc1 37.Nxf6+ Kh8 38.Rc1 37.Nxf6+ 37...Kh8 37...Kh8 38.Rc1 37...Kh8 37...Kh8 38.e5 38.Rc1 38.Rc1 38.Rc1 Rba2 38.Rc1 Rba2 39.e5 38...Kg7? 38...Rba2 39.e5 dxe5 38...Rba2 38...Rba2 39.e5 dxe5 39.e5+- 39.e5 39.e5 Rbb8 40.exd6 39.e5 Rbb8 40.Rc6 39...dxe5 39...Bd7 40.Nxd7 39...Bd7 40.Nxd7 Qe7 39...Rbb8 40.exd6 Bf5 40.Nh5+ 40.Nh5+ 40.Qxe5 Rb4 41.Nd7+ 40.Nh5+ Kg8 41.Qg3+ 40...Kh7 40...Kg8 41.Qg3+ 40...Kh8 41.Qxe5+ f6 40...Kg8 41.Qg3+ Kh8 41.Be4+ 41.Be4+ Kg8 42.Qg3+ Kh8 41.Be4+ Kh8 42.Qxe5+ f6 41.Be4+ Kg8 42.Qg3+ Kh8 1–0
- Start an analysis engine:
- Try maximizing the board:
- Use the four cursor keys to replay the game. Make moves to analyse yourself.
- Press Ctrl-B to rotate the board.
- Drag the split bars between window panes.
- Download&Clip PGN/GIF/FEN/QR Codes. Share the game.
- Games viewed here will automatically be stored in your cloud clipboard (if you are logged in). Use the cloud clipboard also in ChessBase.
- Create an account to access the games cloud.
Carlsen,M | 2826 | Nakamura,H | 2758 | 1–0 | 2011 | C50 | 3rd Chess Classic | 3 |
Please, wait...
Analyzing your own games
Another option is to enlist the help of others to analyze your games. Though Fritz can obviously analyze them from your own computer with the engine of your choice, this process does allow deeper analysis in a shorter period of time. The reason is that the server does not simply ask one move at a time, but rather sends off each position to a different user, and thus has numerous users split up the work of analyzing your game.
There is a cost, and it is not a monetary one. Each position you analyze and contribute to the LiveBook gives you credits, and each position for which you request analysis costs you credits. Thus, no one is able to simply take without giving.
The process for requesting game analysis is very simple and surprisingly fast depending on the number of users connected.

First make sure your game is visible in the Notation

Next, go to the Analysis pane and click on Submit Game. Within minutes you will see
variations and evaluations begin to populate the game score. Don't forget to save it!
Happy analysis!
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