lichess-org/lila on Hacker News

…function to map centipawn advantage to the probability bar, derived from observed outcomes: https://github.com/lichess-org/lila/pull/11148 From an ML perspective, this is basically logistic regression with a single feature. However, once…

comment by salamo · 2026-02-24 · in What Is a Centipawn Advantage?

…as the stockfish binary. See https://tests.stockfishchess.org/tests/view/69515c60572093c1... and https://github.com/lichess-org/lila/pull/18671

comment by Viren6 · 2026-01-13 · in Ask HN: Discrepancy between Lichess and Stockfish

Nice but AFAICT one can self-host lichess https://github.com/lichess-org/lila so I'd imagine based on how active it is, how inclusive it is (including languages like Chinese) I would provide some comparison with it. In terms of long term…

comment by utopiah · 2025-09-27 · in Show HN: Family Chess: Play across firewalls and Internet cultures

…customize it for your specific use case. More specifically modify line that allow to pick the theme https://github.com/lichess-org/lila/blob/64b6f7966c8ed48dc90... With one of the value given here : https://github.com/lichess-org/lila/blob/…

comment by GistNoesis · 2025-04-21 · in X-Ray Defence

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Palantir.ts

story by benatkin · 2025-03-28 · 1 comment

…Lichess has always responded with "puzzles aren't competitive; exploiting them doesn't matter." ( https://github.com/lichess-org/lila/issues/16393#issuecommen... ) Admittedly, they are correct: puzzle rating doesn't really matter. So,…

comment by _bittere · 2025-03-08 · in Lisolve: Exploiting the Lichess Puzzle System

https://github.com/lichess-org/lila?tab=readme-ov-file#produ...

comment by enneff · 2024-10-24 · in What happens when you make a move in lichess.org?

…code. Lichess is open source and we can see exactly what this field is here, it's the average lag: https://github.com/lichess-org/lila/blob/45b5f0cfbbf6c045ad7... send = (t: string, d: any, o: any = {}, noRetry = false): void => { const…

comment by huins · 2024-10-23 · in What happens when you make a move in lichess.org?

There's also a nice architectural diagram on their GitHub page: https://github.com/lichess-org/lila

comment by jefurii · 2024-09-20 · in Lichess: Post-Mortem of Our Longest Downtime

…talented developer who used to work for the French agency responsible for the Scala Play Framework. https://github.com/lichess-org/lila and https://github.com/lichess-org/scalachess are great resources for anyone ever curious to see a…

comment by agentcoops · 2024-09-19 · in Lichess: Post-Mortem of Our Longest Downtime

…definition for a chess blunder isn't straightforward, here is one example from the Lichess UI: https://github.com/lichess-org/lila/blob/b527746b179cdde6438... Basically, if you make a move which decreases your winning probability more than…

comment by janalsncm · 2024-04-03 · in Avoid blundering: 80% of a winning strategy

That's the one and only server running https://github.com/lichess-org/lila , ie. the main scala JVM application. See https://lichess.org/source for a list of all the services with a more-or-less up to date diagram.

comment by lukhas · 2022-12-16 · in Lichess gets a big upgrade. It doesn't go as planned

There are some tests, but definitely not a lot for a project of this size https://github.com/lichess-org/lila/search?q=Specification

comment by dikei · 2022-12-16 · in Lichess gets a big upgrade. It doesn't go as planned

It seems that this commit fixed it: https://github.com/lichess-org/lila/commit/c4e53798d171ab71b...

comment by facorreia · 2022-12-07 · in Lichess on Scala3 – Help needed

Lichess by Thibault Duplessis https://github.com/lichess-org/lila/graphs/contributors

comment by reducesuffering · 2022-11-08 · in Ask HN: What are some excellent pieces of software written by a single person?

> At the moment, there are no plans to add any more variants ever. https://github.com/lichess-org/lila/issues/11660#issuecommen...

comment by runarberg · 2022-10-29 · in Taking Lichess to the next level

…donations, so isn't an unpaid model (it's just designed to cover costs, not generate profits). - https://github.com/lichess-org/lila - https://lichess.org/patron

comment by synu · 2022-08-03 · in Hikaru Nakamura's Forbidden Platform

Thanks for the recommendation. I will check out Scala. Especially since https://github.com/lichess-org/lila is also written with Scala.

comment by SpacePortKnight · 2022-07-12 · in Ask HN: Any alternative to Java (OOP) which has the same ecosystem?

It has a lot of contributors nowadays, but Thibault made the original site on his own. https://github.com/lichess-org/lila/graphs/contributors

comment by valenaut · 2022-02-28 · in Ask HN: Single-person creations that have stood the test of time?

…solve maybe refactoring this function/algo at the core of the pairing would have more bang for buck https://github.com/ornicar/lila/blob/98691c8901cc0e7d0f338f4...

comment by jb_s · 2021-12-22 · in Our recent server issues

The entire site is open source. You could make your own. People have done that for Go. https://github.com/ornicar/lila

comment by queuebert · 2021-12-16 · in Chess.com vs. Lichess

…insights, yep seems mostly true, and it's the case for a surprising number of large projects. https://github.com/ornicar/lila/graphs/contributors

comment by Barrin92 · 2021-12-15 · in Chess.com vs. Lichess

Open source as well: https://github.com/ornicar/lila

comment by j4yav · 2020-11-16 · in On Learning Chess as an Adult – From 650 to 1750 in Two Years

…you to do pretty much anything you could think of wanting to do when it comes to online chess. [0]: https://github.com/ornicar/lila/ [1]: https://lichess.org/api

comment by danielskogly · 2020-11-16 · in On Learning Chess as an Adult – From 650 to 1750 in Two Years

The lichess code is actually open source, although not in a simple component for people to use: https://github.com/ornicar/lila/search?q=captcha The lichess development process is actually very worthy of praise, lots of useful stuff linked…

comment by thom · 2020-10-28 · in Chess Captcha

…just because it was the first platform I saw. Thank you, I'm definitely making the switch. [0] https://github.com/ornicar/lila

comment by FR10 · 2020-10-19 · in Chess’s Cheating Crisis

And has an interesting tech-stack. Edit: Links. 1. https://lichess.org/source 2. https://github.com/ornicar/lila

comment by yewenjie · 2020-10-19 · in Chess’s Cheating Crisis

…Typescript, websockets, nginx and more [1] [0] https://news.ycombinator.com/user?id=ornicar [1] https://github.com/ornicar/lila

comment by lgl · 2020-06-17 · in A grandmaster who got Twitch hooked on chess

…links to play online? Some sites I can think of that support other variants: https://lichess.org/ ( https://github.com/ornicar/lila/ ) And some crazier variants: https://www.pychess.org/ ( https://github.com/gbtami/pychess-variants )…

comment by symplee · 2020-03-28 · in Pauli Chess

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Lila: Free open source chess server that powers lichess.org

story by DAlperin · 2019-11-06 · 0 comments

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Lichess.org: the forever free, adless and open source chess server

story by yvonnick · 2019-01-24 · 0 comments

…truly free[1] and provides an amazing UX. Lichess is a true gift to the chess community. [0] https://github.com/ornicar/lila [1] https://lichess.org/features

comment by jbuss · 2019-01-10 · in How I Finally Hit 2000 on Lichess and Improved My Rating

Here's an interesting stack: https://github.com/ornicar/lila It's the server/client for https://lichess.org/ which is a powerful online chess server. Scalla with Akka actors is used to provide realtime multiplayer chess (bullet chess…

comment by benatkin · 2019-01-05 · in Ask HN: Go-to web stack today?

First search revealed some funny test code :) https://github.com/ornicar/lila/blob/master/modules/shutup/s...

comment by ssijak · 2018-11-30 · in Show HN: An experimental code search engine

…the chess server behind the greatest chess site of internet[2]. [0] https://github.com/ornicar [1] https://github.com/ornicar/lila/ [2] https://lichess.org/

comment by sldenazis · 2018-07-02 · in Ask HN: Who are some unsung heroes in open source that need more support?

…to mention that if you play chess online, the best one is lichess.org. It is free and opensource: https://github.com/ornicar/lila . I am unaffiliated but really like lichess.

comment by omeid2 · 2018-06-19 · in Judges sentence youth offenders to chess, with promising results

…too ;-) Love the tagline, "lichess.org: the forever free, adless and open source chess server" [1] https://github.com/ornicar/lila

comment by virtualwhys · 2017-11-19 · in Stockfish Wins Chess.com Computer Championship

…you practice the correct move where you had made a mistake or "blunder". And it's open source: https://github.com/ornicar/lila

comment by afro88 · 2017-08-25 · in Mental processes of chess masters revealed how people become experts (2016) [pdf]

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Lichess.org API

story by rajeemcariazo · 2017-08-20 · 0 comments

Looks like lichess is using strings for IDs so they will not have this issue https://github.com/ornicar/lila/blob/master/app/controllers/...

comment by shmageggy · 2017-06-12 · in Chess.com stopped working on 32bit iPads because 2^31 games have been played

…in chess or code, I recommend following it -- their great execution will inspire you. [1] https://github.com/ornicar/lila

comment by csmajorfive · 2016-12-23 · in LiChess: Learn from your mistakes

FYI, Lichess code is open source on github. https://github.com/ornicar/lila I've referenced it for both Scala (server side) and mithril.js (client side).

comment by wtf_is_up · 2016-12-01 · in Carlsen–Karjakin World Championship

Well it's open source ( https://github.com/ornicar/lila ), and all features are for free, forever, without any ads. That certainly puts it apart form other chess services I know.

comment by ornicar · 2015-10-07 · in 100M games played

The punch card graph for the Open Source engine behind Lichess that he wrote is... impressive! https://github.com/ornicar/lila/graphs/punch-card

comment by mrspeaker · 2015-10-07 · in 100M games played

…programming. I recently found lichess.org, which I heartily endorse because it's free software: https://github.com/ornicar/lila

comment by jordigh · 2015-08-04 · in Ask HN: Do you play Chess?

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Lichess - Chess Server in Scala

story by tsudot · 2014-07-28 · 0 comments

…evaluating different Scala frameworks and stumbled upon this project as well as another neat one: https://github.com/ornicar/lila

comment by hrjet · 2013-10-04 · in GitBucket: A Github/BitBucket clone in Scala

Nothing related but see: http://lichess.org/ (source code https://github.com/ornicar/lila )

comment by gidan · 2013-07-26 · in ChessBoardJS