extension ExtPose

GBChess Extension

CRX id


Description from extension meta

Chess Next Move Extension for Chess.com and Lichess.org

Image from store GBChess Extension
Description from store By the creators of SmartAdBlock Get a Hint in the Middle of the Game With GrandBastard Chess Analysis Browser Extension. This extension shows you the next best move in your live chess game. Compatible With Chess.com and Lichess.org. After installation in chrome please refresh your chess game page to allow the extension to be effective. Privacy Policy: We NEVER store any user data. The extension is invisible to visited websites. We do not promote cheating on chess websites.

Latest reviews

  • (2021-09-17) Jazzy Playz: doesnt work on chess.com. trash!
  • (2021-08-30) KOOK COCK: dsnt work
  • (2021-06-21) Matias De Abreu: the game does not detect me
  • (2021-05-15) Tech_CamoDude: I wish it worked but It doesnt work
  • (2021-05-13) RubiGaming88: Works, I managed to beat a 1120 rated player while I was a 270, P.S. This extension only works via live chess, this is why for some people, you can't use it. Also, I gave 4 stars, because after an En Passant, it sometimes just stops working, could you please edit that? Thanks
  • (2021-05-03) ttv _nohealings: doesn't work on lichess. And yes i've tried everything.
  • (2021-04-20) nilay kumar: good i dont wan cheat okd? :p
  • (2021-04-19) X3M Slasher: NOt working
  • (2021-04-18) sam klok: It worked in 2020, I used it for analyzing my own moves, which was good. Then chess.com changed something on their website, and it stopped working. "No Chess Game Detected" it's what I'm getting in Chrome and Brave browsers. I would like to get a new version, please fix it.
  • (2021-04-09) SCRP: Now the idea is great but the extension stops working after a while. Some moves don't get updated and the board changes instead being identical, this happens after 5-4 moves.
  • (2021-04-01) ThatDaven: Doesnt work on lichess nor chess.com anymore
  • (2021-03-27) Rishav Roy: Unable to capture the chess board properly on lichess
  • (2021-03-17) EvilMrGui: Use it for live chess
  • (2021-03-13) jello: It used to work but now it doesn't detect game on hcess.com i've uninstalled and reinstalled refreshed the page and restarted my computer still does not work but it used to work fine
  • (2021-03-03) Yusuf Can Avcı Avcı: dont working chess.com
  • (2021-03-03) 30 damage with a gold pump: it wouldn't detect anything i don't suggest probably should look for something else
  • (2021-03-02) Marie T: thought website companies couldn't detect this well think again bud.. they can
  • (2021-02-28) Gauthier: 'no game detected' trash
  • (2021-02-24) L H: it didn't work D: : no game found ;-; ;-; tell me why
  • (2021-02-23) Michele Capone: It's not working on chess.com
  • (2021-02-15) ⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻: pieces dissapears, pls fix it
  • (2021-01-26) Nicholas Sahala Panjaitan: I'm Sorry this extension is not working at chess.com
  • (2021-01-24) Johan Degraeve: Does not work at all
  • (2021-01-23) Noliving: Doesn't work. It just keeps saying there is no game detected
  • (2021-01-07) coco hacks 2: problems: it stops working and changes into a different chessboard after about 5 moves on lichess.org a bit slow gets detected very easily (please fix these :)
  • (2020-12-31) Tanercan Bilgin: not working on chess.com
  • (2020-12-23) jayday9991: it doesn't work at all. I will change review when it starts to work
  • (2020-12-22) Carlos Matheus: No Chess Game Detected, pls fix
  • (2020-12-19) Ancient Drip Knight: Doesn't detect chess.com, maybe they patched it.
  • (2020-12-19) Axxetto: Worked for one game
  • (2020-12-15) nsaunders: doesnt work on lichess . it cant recognize the game after 4-7 moves or doesnt work at all
  • (2020-12-09) Ivan Villamar: Works pretty well on chess.com but lichess.org is kinda buggy, after 3 moves the pawns will go back to their positions after that. In chess.com the gb chess extension only work when your in Live Chess. Liked it man
  • (2020-12-06) Koky Kampuš: It never detected a game
  • (2020-12-06) Muhammad Valdis Aldevhan: at chees.com error board always stuck
  • (2020-12-03) Night Wolf: It doesnt work with the current version please update
  • (2020-11-28) lubek: im change the opinion when its has been fixed in lichess.org this remove figures
  • (2020-11-23) Bogdan Radu: It does not work, after a few moves it stop registering any move on the chess board. I know the comment is fabricated, easier for the devs to lie than actually fixing it. BTW the problems happes on chess.com
  • (2020-11-20) Big Nope: Unfortunately, stops detecting the chessboard properly after a few moves. This happens on both chess.com and lichess. A fix would be spectacular! Trying to learn how to play chess with this tool
  • (2020-11-12) Jaxson Rogie: usually very good but recently it doesn't update properly so once you update it and fix it itll be just as good as it used to be (I'd say around four stars) but right now it doesnt work on chess.com
  • (2020-11-11) Nexialist: The recognize doesn't update correctly for chess.com. Its also fairly slow (which I don't mind). I really hope the it updates correctly soon!
  • (2020-10-25) vBalino: took forever to do anything
  • (2020-10-19) Tom Saunders: worked well for a while, but now it doesn't register that the back row of pieces have moved, it only notices the movement of pawns. Looks like lots are having this problem and the devs are not fixing it (they are saying that this is a lie)
  • (2020-10-01) William Z: Works very well. Other reviews are misleading.
  • (2020-09-26) James Andrew Ticse: It only detects the pawns in chess.com, idk how
  • (2020-09-17) Abubaker Mudhir-Said-Muftah: No longer works is broken.
  • (2020-09-16) Dillion Nguyen: stop working on chess.com after a couple days
  • (2020-09-15) Theo Pana: Encourages cheating.
  • (2020-09-11) Will Holliday: Was working really well but now it doesn't detect moves of all major parts, i'm not sure what happened will try reinstall it or maybs chess.com has chanegd something?
  • (2020-09-11) Erigleydson Omena: Parou de funcionar

Latest issues

  • (2021-07-14, v:1.36) Bill Gamelson: chess.com
    Will not work on chess.com. Junk.
  • (2021-06-17, v:1.36) Officail CEOofCEOs: bad
    i got banned
  • (2021-03-16, v:1.36) YEVGEN SHEVCHENKO: I hope you will get cancer and die
    I hope you will get cancer and die.
  • (2021-02-23, v:1.36) Michele Capone: Not working
    Is there an update?
  • (2021-01-07, v:1.36) Plocko Star: doesnt work for chess.com anymore
    used to work but now it cant even detect games for chess.com
  • (2021-01-06, v:1.36) Komostra Ling: not detecting the game
    not detecting the game after 5 moves in latest version on Lichess.com please fix this issue as soon as possible , Thank u
  • (2020-12-20, v:1.36) AH SE: the app dosnt work anymore
    in chess.com the app wont detect any move please fix the problem.........<<<<
  • (2020-11-28, v:1.36) lubek: removing figures?
    when im playing in 50% of the game removes figure
  • (2020-11-27, v:1.36) Eduardo Alves: Stopped working on chess.com
    Doesn't detect the game.
  • (2020-11-08, v:1.36) Tom Saunders: still not working and no response from devs
    they don't care lol
  • (2020-11-08, v:1.36) Garv Gupta: not working
    idk why stoped working ):
  • (2020-11-02, v:1.36) Ankit Chauhan: not working
    it stops detecting the lower line which consistof rook bishop knight on chess.com sometimes it moves sonetimes it doesnt pls fix it
  • (2020-10-19, v:1.36) Tom Saunders: Only detecting pawn movement
    Hi this was a really cool program and its nice you are doing it for free but it no longer works on Lichess or Chess.com. Back pieces are no longer detected and only pawn's movements are so it's difficult to use
  • (2020-08-26, v:1.32) Xianthu Laman: STILL NOT WORKING
    Its not working even after 1.32
  • (2020-08-24, v:1.31) Feysal Gholampour: 1.32
    any plans for 1.32?
  • (2020-08-20, v:1.31) Tristan Ellenberger: 1.32
    When will 1.32 come out?
  • (2020-08-18, v:1.31) Tristan Ellenberger: Game not getting detected
    This extension used to work perfectly fine for me but a few days ago it stopped detecting any games on lichess. Is that my fault or is it a known error?
  • (2020-08-18, v:1.31) aa bb: v1.31
    does not detect games on lichess
  • (2020-08-17, v:1.31) Feysal: v 1.31 still doesnt work on lichess
    v 1.31 still doesnt work on lichess
  • (2020-08-15, v:1.29) frenzy forester: yea the extension doesn't work anymore on lichess
    it has been working before though
  • (2020-08-14, v:1.29) Tristan Ellenberger: Engine stopped working
    Hey, the engine stopped working for me today - is that related to me or is there an issue being fixed?
  • (2020-07-04, v:1.29) Konstantinos Mantos: persistent window
    window closes after eveyr move, pls make it persistent
  • (2020-06-27, v:1.29) Mspy1: puzzle rush please
    Make it for puzzle rush admin please.
  • (2020-06-26, v:1.29) CanadaNuma1: Chess.com
    can you make this compatible with chess.com's puzzle rush and other modes?
  • (2020-06-17, v:1.29) Magnus Johansson: Depth?
    How deep (in plies) does the engine search?
  • (2020-05-22, v:1.29) Dustin Davis: En Passant
    This extension is great but it stops working once someone makes an en passant move.
  • (2020-05-18, v:1.29) Romar Erstad: Window staying open?
    is it possible to have the window open throughout the game? So you dont have to click the extension for every move.
  • (2020-05-17, v:1.29) Joel Dahlberg: Doesn't detect moves on chess.com
    Don't know why but on chess.com it never detects any moves, it detects the chess game but no move. On lichess it works perfectly fine.
  • (2020-05-15, v:1.29) Xadrez Sem Complicação: firefox extension
    Hi...is there any place where i can find the firefox extension? I searched on the firefox store and dindt find it.
  • (2019-12-16, v:1.28) Night Wolf: please fix it for lichess
    please fix it for lichess
  • (2019-05-15, v:1.27) Leonardo Lamberti: lichess
    Hi. It worked for 2 or 3 days, now only says "If your chess game is not detected try reloading the page" already reinstaled and chrome is on last version (74.0.3729.157 x64) can you check it please?
  • (2019-04-19, v:1.27) David Stefanov: Puzzle rush
    Could you make it be able to work in chess.com puzzle rush?
  • (2019-04-07, v:1.27) Fast Gamer: nice
  • (2019-01-31, v:1.26) adrian: too slow
    is there any way to make it calculate and give a move faster?
  • (2019-01-27, v:1.26) Archmageix TheDon: Board flip
    This is awesome but needs an option to flip the board
  • (2018-12-29, v:1.24) Izukuً Midoriyaً: Grand Bastard extension
    For some reason the grand bastard extension doesn't work on lichess.org and since i got banned on chess.com and can't log back in my only other option is to use lichess.org.
  • (2018-05-08, v:1.1) Vicky Verma: For Android
    This is work in Android chrome browser or not
  • (2018-03-29, v:1.1) Jonas Deejee: lags behind a move
    I have a problem with the GrandBastard extension. After 2-3 moves on chess.com it calculates the next best move based on the previous one. So the advice is always for the move that already has happened. Is there a way to solve this?


10,000 history
2.5 (100 votes)
Last update / version
2020-09-08 / 1.36
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