You can play a quick round against Stockfish by clicking "Quick match AI".
If you want more info about how I picked the positions with Lc0, say the word.

I’m building BoardSignal, a chess product that looks across your Chess.com games to show what keeps repeating and what to focus on next.

This week I made the development pipeline public too. I wanted somewhere that shows what’s actually being worked on, what shipped, what broke, and what’s coming next instead of only showing the finished product.

BoardSignal is live already, and the pipeline is basically the continuing build record from here.

Still learning a lot about the difference between building features, getting people in, and getting them to actually come back.

I've been building a chess opening site on my own: ochess.app. And I'd love some feedback. There's also a short video tutorial on the homepage showing how it works

The idea: what you face in the opening depends heavily on your rating, so the course should too

For example, after 1.e4 c5, the move 2.Bc4 appears in about 15% of games at 1400, but only 0.66% at 2200+. Most courses barely cover it, so a 1400 player who studied the Sicilian still has no idea what to do against the move they'll face most often

So a 1400 player and a 2200 player can face completely different "typical" openings, even though they're playing the same first moves

On ochess, the main lines come from strong players, while opponent replies are filtered by rating. So the 1400 course shows what you're actually likely to face at 1400, including common mistakes you can punish

There are currently 35 courses, 196 traps and puzzles, plus game analysis and a personal opening explorer

If you have 10 minutes, pick a course around your rating and let me know: does it actually match what you face over the board?

I'd especially love to hear where it gets things wrong

Thanks!

What if your chess app watched your online games, caught every time you forgot your prep or your opponent deviated from your prep, lets you patch your lines real fast, audit your repertoire and made you drill your blind spots?

Launching in Beta today: trivedh.com/chessrepo

This combines a lot of what other apps do and a lot more than that as well. Let me know what you guys think.

Hi,

for more than 40 years one of my hobbies is chessprogramming. I started on an Amstrad CPC6128 in 1984 with a program in Z80-Assembler (I still have the program and the CPC still works!) and have created countless versions since then. I always did it just for myself and never looked into someone else code (except for the book on Sargon by the Spracklens from 1978 :) ). My latest version (Astimate 4), however, became very good (not Stockfish-level though!) and I want to publish the Android version now on Google Play for free. It is an UCI engine in OEX format that can be loaded into GUIs like DroidFish, Chess Pgn Master, Chessis or Chess for Android. While the internal test with some friends went very well, Google requires that any app is tested by at least 12 testers for 14 days before it can be published. So now I am looking for people who would like to test the app and give feedback. The only requirement is that the testers have an Android-device, a gmail account and are willing to spend 14 days with my app. In return I can give you information on how my engine works and which tricks I have applied. I can even share my source code. That one can be compiled in Linux and Windows too (my engine works in Arena for instance). I have also integrated a rudimentary terminal window in the app so that it can be tested even without a GUI. You can enter things like "perft" and all UCI commands and even play a complete game in the terminal window. However, its prefered usage is as engine in a real GUI.

By the way, the app will always be free, does not contain any ads, nor does it ask for any permissions or personal data in Android.

If you would like to help me, please get in contact with me.

Dr. Axel Steinhage

PS: I have a huge (50+) collection of chess computers (including a working Novag Robot). Also a large collection of computerchess literature (including ALL issues of Computerschach & Spiele). If anyone wants to know about that, please don't hesitate to ask me.

​

Hi everyone,

I’m a chess arbiter and organizer, and I’ve been building Chess-Publisher, a free and open-source Windows desktop application focused on real OTB tournament management.

The goal is not to build another chess playing or analysis app. I want to reduce the number of separate tools an arbiter or organizer needs for running a tournament.

The current stable version is v1.04.02.

Current features include:

Tournament setup, registration and participant management

Swiss Dutch pairing using the upstream Gacrux 1.9.57 pairing engine

Result entry and standings

FIDE rating-list workflows

TRF16 / TRF26 export

Tournament interoperability/export workflows

Chess-Results publishing and administration integration

Telegram publishing

Early DGT e-Board integration

Local tournament storage

No project analytics or tracking

Chess-Publisher is released under the MIT License.

A transparency note: development has been heavily AI-assisted. The tournament requirements, workflow design, testing, regression validation and release decisions are driven by me from the perspective of an actual arbiter and tournament organizer. The source is public so anyone can inspect it.

The project is not currently FIDE-endorsed, so I don't want to imply otherwise. Pairing, TRF and rating-related functionality is being developed conservatively, with regression testing and independent checks.

The current Windows installer is also not code-signed yet, so Windows SmartScreen may display a warning. SHA-256 hashes are published so builds can be verified.

GitHub:

github.com/kbilyal/ChessPublisher

I’d especially appreciate feedback from arbiters, tournament organizers and developers:

What important tournament workflows are still missing?

What would make the UI faster during a real event?

Which interoperability/export formats are essential?

What pairing/reporting edge cases should be tested?

What would make you trust and use an open-source tournament manager?

If you have experience with Swiss-Manager, Vega, SwissSys, WinTD or similar software, your criticism would be especially useful.

I’d rather find the weak points early and improve them than pretend the project is finished.

Thanks!

A complete 6-piece endgame tablebase called ChessTB, created by Bojun Guo (noobpwnftw). He is the same person that helped create 7-piece syzygy tablebases along with Ronald de Man.

4-metrics - DTZ, Custom DTC, DTM, and DTM50. These tablebases support Standard and Freestyle Chess (Chess960/FRC) castling positions.

First of it's kind to support 50-move aware Distance to Mate (DTM50) based on the halfmove clock.

Source: https://github.com/noobpwnftw/chesstb

I’ve been building Make Good Moves, a chess training site focused on realistic decision-making.

Instead of requiring a single predetermined move, positions are deeply analyzed with Stockfish to identify multiple strong alternatives. The site mixes traditional tactics with positional puzzles where you might need to improve a piece, find counterplay, simplify, or choose the right pawn break.

It includes ratings, skill-specific EXP progression, hints, and post-puzzle analysis. I’d love feedback from fellow engine nerds, especially on the puzzle-generation and evaluation approach. I originally built this for myself, but after training with it, I feel like it could be a serious tool for anyone to learn from!

Completely free to use! makegoodmoves.com

Hi There!

I'm working on ATOM Chess, an open-source project whose goal is to build a robotic arm capable of playing chess autonomously on a physical board.

The project combines:

• Computer Vision
• Robotics
• Motion planning
• Inverse kinematics
• Embedded systems
• Chess programming
• Stockfish / UCI
• C++ / Python
• Computer systems and software architecture

The general pipeline is:

Camera → Chessboard detection → Board state → Chess engine → Move planning → Robotic arm

The project is being developed as a modular system rather than just a one-off prototype. We're trying to build something that is actually maintainable, testable and extensible.

The repository is already being developed, but this is where I could really use the community.

What I'm looking for

I'm especially interested in people who are willing to review the project, even if they don't want to actively contribute code.

For example:

• Reviewing the software architecture
• Reviewing C++ code
• Reviewing robotics / motion-planning decisions
• Reviewing computer-vision approaches
• Finding architectural problems or unnecessary complexity
• Suggesting better algorithms
• Reviewing tests
• Pointing out things that will probably break later
• Suggesting improvements to documentation
• Discussing alternative approaches

You don't need to become a permanent contributor.

Even a detailed comment such as:

"I would structure this differently because..."

would be extremely valuable.

Who might be interested?

This could be interesting if you're into:

Robotics • Computer Vision • C/C++ • Embedded Systems • Chess Programming • Motion Planning • Open Source • Software Architecture • Computer Science

I'm particularly interested in hearing from people with experience in robotics, CV, embedded systems or chess programming who can look at the project from a critical perspective.

I'm a university student building this as a serious long-term project, so I'm also very interested in learning from people who have already made similar systems.

The project is open source, and contributions are welcome at any level — code, documentation, testing, architecture reviews, algorithms, hardware, etc.

If you're interested, feel free to take a look and tell me what you think.

Repository: https://github.com/Atom-Laboratory/atom-chess

I'd especially appreciate brutally honest technical feedback.

Thanks!

[BoardSignal](https://www.adminhub-global.com/) takes your game data and presents it to you in an easy to understand format designed to help you improve. From the home page it is all pretty self-explainatory. Let me know if there are any issues or feedback for improvements please let me know.

Right now, I think I am close to simulating a true OTB experience online.

My setup:

- A Square Off Pro (yes, a Chessnut Pro or other tournament size e-board will work ... or any board that Chessconnect supports if you don't care about the size of the board). I have had my Pro for a number of years and ever since I added a Billy Gate to my setup ... I find it's great as-is.

- A DGT 3000 with a DGT 3000 BLE Gateway. Note: I put a rubber band around the clock at the opponents side ... so when I stop the clock it automatically pops back up and is ready for me to stop on my next move (otherwise you have to alternate which side you press). Note: This doesn't affect the opponent side since the clock is stopped automatically after you make the opponent move.

- You could easily use a scoresheet and something to write with (or even a blank piece of paper) ... I chose to use an APP called LPDO in Scoresheet Mode. I still have to fill in moves, it allows me to compare the actual moves with those I recorded. No paper or writing utensil required. I use it on my phone, because I like to use my tablet for the e-board connectivity.

- Chessconnect App (which allows connection to both the Clock and the Board). I then have been connecting to Chessiverse to test everything out ... in casual mode so it won't affect my rating while I am testing (after soldering the DGT 3000 gateway together, I needed to make sure everything works ... and will continue to work before playing actual live players). But there's no reason I couldn't connect to chess.com or lichess.org and play a live game similarly.

You would think this setup is confusing to get setup ... but it's really not.

You turn on the BillyGate then turn on the Square Off Pro (the BillyGate automatically connects to the Pro). Turn on the DGT 3000 BLE Gateway ... the Clock automatically comes on and indicates Bluetooth is waiting. Open up the LPDO app if you left things clean, you are ready to begin a game. Open Chessconnect ... connect to the clock, connect to the board. Once connected, select the site you want to play on ... and begin a game. The clock automatically gets the configuration settings from Chessconnect and if it's your turn you begin the game (your clock is running by now).

Why do this?

If you play OTB tournaments, it's important to be comfortable with a physical board, a clock and be accurate in recording moves of the game (for both sides). If you play online a lot most of this is done for you (and if you don't use an e-board to do this, you may be surprised how that tactile feel is important).

Thoughts?

The core idea: run Stockfish 18 WASM and analyze a player's entire game history, not just one game at a time.

some features out of the many are-

• Opening trees built from the player's actual games
• Move-by-move engine evaluations
• Opening weakness detection
• Recurring blunder patterns
• Blown wins games where the player had a significant winning advantage but eventually lost
• Missed and allowed forced mates
• Tactical pattern statistics
• Endgame performance
• Material resilience
• Castling tendencies
• Simplification tendencies
• Opening repertoire drift over time
• Playing-style
• Opponent scouting
• Per-game Stockfish review(chess.com style)

Opening side: builds an actual opening tree from the player's games, merging transpositions via normalized FENs. Each node shows games reached, W/D/L, win rate, ECO, engine eval, and weakness signals , also an interactive graph where node size = games played and color = move quality. There's also a repertoire builder where you play against the engine while it shows master-game stats for the position, and a trap database mined from millions of high-rated games that surfaces relevant traps while you build.

What I actually care about: instead of "you blundered on move 27," I want to say "you keep reaching this type of position and your eval keeps sliding" or "you have a recurring weakness in this opening line." Inferring patterns across hundreds of games rather than analyzing games in isolation.

It's free, no account needed: https://www.auditchess.com

Would love feedback from anyone who's worked with engines, PGN databases, eval pipelines, or WASM especially what you'd want added.

Hi!

I am so tired (and I am sure most of you will relate to this) of Chess.com game review

I have basically rebuilt it from the ground up, and it also includes puzzles, an ai coach, and a full on anticheat that allows you to review your opponents games and decide if they were cheating or not.

You can try it out at chess.sidastuff.com and please keep in mind that it is still in Beta.

I would love if you would give me any suggestions or bug reports in the comments down below. I am working on a very large ui update, so most ui bugs etc have already been reported and will be fixed soon.

Enjoy!

Hi all - I love chess and I love programming, so a while back I decided to combine both and build ChessLounge (https://chesslounge.net).

I made the decision to keep it completely free and ad-free, and share it with the chess community rather than turn it into a commercial product.

The engine behind it is a custom, self-developed engine, covering the full range from 900 to 2600 Elo - so it should give a fair challenge whether you're just starting out or already quite strong. It runs directly in the browser via WebAssembly, no install needed.

No account required to play against the computer. You can also play a friend online in a private room, or side-by-side on the same device - no matchmaking against strangers.

I'm just starting to build a community around the app, so if you enjoy it, I'd genuinely appreciate any feedback - and if you know someone who might like it too, feel free to pass it along.

Hey I made a chess game and put it for pre-registration on Google play store

https://play.google.com/store/apps/details?id=com.spookachess.game&pcampaignid=web_share

I hope you're gonna love it! I will launch it after 6 September

Does anyone know centipawn values of non-standard chess pieces? I mean, when pawn is roughly 1, knight roughly 3, etc. What would be the value of e.g. a piece that moves like king (but is not a king in terms of other non-movement rules)? Or giraffe (the piece that moves in an elongated L)? Is there a resource somewhere with such data? Just for curiosity..

Guys Try out my chess website - https://quick-chess-gambito.lovable.app Gambito!

HERES WHY:

WE GOT WIN ODDS BAR CALCULATED BY AI

WE GOT TOURNAMENT MODES

WE GOT EVERY TYPE IMAGINABLE

WE GOT CHESS960 AND OTHER MODES

SO WHAT ARE YOU WAITING FOR

Also please give feedback as I want to be up there with chess.com and lichess so would really appreciate it if anyone can try this out and tell me what's there to improve

I feel like it should be defined as 0. But that would make its expected score against Stockfish (SPCC Elo 3908) over one in a quadrillion, which seems far too high.

Saludos soy nuevo en la comunidad y desde hace un tiempo vengo trabajando en un programa de ajedrez básicamente ss un programa de ajedrez de escritorio bastante completo: permite jugar contra Stockfish, analizar partidas y posiciones, revisar precisión y clasificar jugadas, trabajar con bases PGN/SCID de millones de partidas y explorar aperturas. Incluye editor de tablero, Chess960, puzzles, práctica de mates y finales, repertorios, estudios y entrenamiento de líneas, preparación contra rivales, libros Polyglot y tablebases Syzygy. También puede reconocer posiciones desde imágenes y diagramas de PDF para analizarlas directamente con el motor. Está diseñado para funcionar completamente offline.

Y me gustaría identificar usuarios que lo pongan a prueba y me den retroalimentación, ya intenté hacer esto en un grupo de programadores y me tiraron hate porque mencioné que trabajé con IA como apoyo para desarrollar el código, pero ese no es el tema, el punto es que si ustedes tienen conocimiento de ajedrez y de programación podrían dar una buena retroalimentación

Les dejo algunas capturas de mí programa.

I posted a few days ago about playtesting, playtesting is still available, you can find the instructions on the website! :)

I'd like to share some progress I made on my formally verified tablebase project. I recently was able to finish work on a KRvK tablebase, which you can explore here.

For those that do not know, Rocq (formerly Coq) is a proof assistant for designing and verifying mathematics and computer programs. My project is a tablebase generator for abstract classes of two-player games which is proven to produce the correct game values, and I just completed work on instantiating it for King and Rook vs. King positions in chess.

I understand that generating a 3 man tablebase on its own is nothing new, but I would say that doing so in a functional programming language and formally verifying it adds a whole new layer of complexity, and I am really happy with how it all came together.

If you'd like to take a look at the code, the relevant repos are:

• https://github.com/emarzion/coqchess: chess + chess tablebase development

• https://github.com/emarzion/coqtbgen: abstract tablebase generator

• https://github.com/emarzion/games: library for combinatorial games

Here is an old blog post of mine which discusses some of the mathematics and design choices around correct-by-construction tablebases.