An open source headless CMS / real-time database. Powerful table editor, full-text search, and SDKs for JS / React / Svelte.

AtoMiC Toolkit simplifies HTPC / Home Server setup and management on Ubuntu and Debian variants including Raspbian. It currently supports: Couchpotato, Deluged, Emby, FFmpeg, Headphones, Htpcmanager, Jackett, Kodi, Lazylibrarian, Madsonic, Mono, Mylar, Nzbget, Nzbhydra, NzbToMedia, Ombi, Plex, Plexpy, Pyload, qBittorrent, Radarr, Sabnzbd+, Sickgear, Sickrage, Sonarr, Subsonic, Transmission, Unrar, Watcher, and Webmin.

🚀3x faster than MinIO and RustFS. S4Core is an open-source, Rust-based S3-compatible server. Say goodbye to inode exhaustion and hello to atomic operations and smart deduplication

A list of practical projects that anyone can solve in any programming language (See solutions). These projects are divided into multiple categories, and each category has its own folder. To get started, simply fork this repo. CONTRIBUTING See ways of contributing to this repo. You can contribute solutions (will be published in this repo) to existing problems, add new projects, or remove existing ones. Make sure you follow all instructions properly. Solutions You can find implementations of these projects in many other languages by other users in this repo. Credits Problems are motivated by the ones shared at: Martyr2’s Mega Project List Rosetta Code Table of Contents Numbers Classic Algorithms Graph Data Structures Text Networking Classes Threading Web Files Databases Graphics and Multimedia Security Numbers Find PI to the Nth Digit - Enter a number and have the program generate PI up to that many decimal places. Keep a limit to how far the program will go. Find e to the Nth Digit - Just like the previous problem, but with e instead of PI. Enter a number and have the program generate e up to that many decimal places. Keep a limit to how far the program will go. Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number. Prime Factorization - Have the user enter a number and find all Prime Factors (if there are any) and display them. Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one. Find Cost of Tile to Cover W x H Floor - Calculate the total cost of the tile it would take to cover a floor plan of width and height, using a cost entered by the user. Mortgage Calculator - Calculate the monthly payments of a fixed-term mortgage over given Nth terms at a given interest rate. Also, figure out how long it will take the user to pay back the loan. For added complexity, add an option for users to select the compounding interval (Monthly, Weekly, Daily, Continually). Change Return Program - The user enters a cost and then the amount of money given. The program will figure out the change and the number of quarters, dimes, nickels, pennies needed for the change. Binary to Decimal and Back Converter - Develop a converter to convert a decimal number to binary or a binary number to its decimal equivalent. Calculator - A simple calculator to do basic operators. Make it a scientific calculator for added complexity. Unit Converter (temp, currency, volume, mass, and more) - Converts various units between one another. The user enters the type of unit being entered, the type of unit they want to convert to, and then the value. The program will then make the conversion. Alarm Clock - A simple clock where it plays a sound after X number of minutes/seconds or at a particular time. Distance Between Two Cities - Calculates the distance between two cities and allows the user to specify a unit of distance. This program may require finding coordinates for the cities like latitude and longitude. Credit Card Validator - Takes in a credit card number from a common credit card vendor (Visa, MasterCard, American Express, Discoverer) and validates it to make sure that it is a valid number (look into how credit cards use a checksum). Tax Calculator - Asks the user to enter a cost and either a country or state tax. It then returns the tax plus the total cost with tax. Factorial Finder - The Factorial of a positive integer, n, is defined as the product of the sequence n, n-1, n-2, ...1, and the factorial of zero, 0, is defined as being 1. Solve this using both loops and recursion. Complex Number Algebra - Show addition, multiplication, negation, and inversion of complex numbers in separate functions. (Subtraction and division operations can be made with pairs of these operations.) Print the results for each operation tested. Happy Numbers - A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Display an example of your output here. Find the first 8 happy numbers. Number Names - Show how to spell out a number in English. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type if that's less). Optional: Support for inputs other than positive integers (like zero, negative integers, and floating-point numbers). Coin Flip Simulation - Write some code that simulates flipping a single coin however many times the user decides. The code should record the outcomes and count the number of tails and heads. Limit Calculator - Ask the user to enter f(x) and the limit value, then return the value of the limit statement Optional: Make the calculator capable of supporting infinite limits. Fast Exponentiation - Ask the user to enter 2 integers a and b and output a^b (i.e. pow(a,b)) in O(LG n) time complexity. Classic Algorithms Collatz Conjecture - Start with a number n > 1. Find the number of steps it takes to reach one using the following process: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1. Sorting - Implement two types of sorting algorithms: Merge sort and bubble sort. Closest pair problem - The closest pair of points problem or closest pair problem is a problem of computational geometry: given n points in metric space, find a pair of points with the smallest distance between them. Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so). Graph Graph from links - Create a program that will create a graph or network from a series of links. Eulerian Path - Create a program that will take as an input a graph and output either an Eulerian path or an Eulerian cycle, or state that it is not possible. An Eulerian path starts at one node and traverses every edge of a graph through every node and finishes at another node. An Eulerian cycle is an eulerian Path that starts and finishes at the same node. Connected Graph - Create a program that takes a graph as an input and outputs whether every node is connected or not. Dijkstra’s Algorithm - Create a program that finds the shortest path through a graph using its edges. Minimum Spanning Tree - Create a program that takes a connected, undirected graph with weights and outputs the minimum spanning tree of the graph i.e., a subgraph that is a tree, contains all the vertices, and the sum of its weights is the least possible. Data Structures Inverted index - An Inverted Index is a data structure used to create full-text search. Given a set of text files, implement a program to create an inverted index. Also, create a user interface to do a search using that inverted index which returns a list of files that contain the query term/terms. The search index can be in memory. Text Fizz Buzz - Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. Reverse a String - Enter a string and the program will reverse it and print it out. Pig Latin - Pig Latin is a game of alterations played in the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules. Count Vowels - Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found. Check if Palindrome - Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backward like “racecar” Count Words in a String - Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary. Text Editor - Notepad-style application that can open, edit, and save text documents. Optional: Add syntax highlighting and other features. RSS Feed Creator - Given a link to RSS/Atom Feed, get all posts and display them. Quote Tracker (market symbols etc) - A program that can go out and check the current value of stocks for a list of symbols entered by the user. The user can set how often the stocks are checked. For CLI, show whether the stock has moved up or down. Optional: If GUI, the program can show green up and red down arrows to show which direction the stock value has moved. Guestbook / Journal - A simple application that allows people to add comments or write journal entries. It can allow comments or not and timestamps for all entries. Could also be made into a shoutbox. Optional: Deploy it on Google App Engine or Heroku or any other PaaS (if possible, of course). Vigenere / Vernam / Ceasar Ciphers - Functions for encrypting and decrypting data messages. Then send them to a friend. Regex Query Tool - A tool that allows the user to enter a text string and then in a separate control enter a regex pattern. It will run the regular expression against the source text and return any matches or flag errors in the regular expression. Networking FTP Program - A file transfer program that can transfer files back and forth from a remote web sever. Bandwidth Monitor - A small utility program that tracks how much data you have uploaded and downloaded from the net during the course of your current online session. See if you can find out what periods of the day you use more and less and generate a report or graph that shows it. Port Scanner - Enter an IP address and a port range where the program will then attempt to find open ports on the given computer by connecting to each of them. On any successful connections mark the port as open. Mail Checker (POP3 / IMAP) - The user enters various account information include web server and IP, protocol type (POP3 or IMAP), and the application will check for email at a given interval. Country from IP Lookup - Enter an IP address and find the country that IP is registered in. Optional: Find the Ip automatically. Whois Search Tool - Enter an IP or host address and have it look it up through whois and return the results to you. Site Checker with Time Scheduling - An application that attempts to connect to a website or server every so many minute or a given time and check if it is up. If it is down, it will notify you by email or by posting a notice on the screen. Classes Product Inventory Project - Create an application that manages an inventory of products. Create a product class that has a price, id, and quantity on hand. Then create an inventory class that keeps track of various products and can sum up the inventory value. Airline / Hotel Reservation System - Create a reservation system that books airline seats or hotel rooms. It charges various rates for particular sections of the plane or hotel. For example, first class is going to cost more than a coach. Hotel rooms have penthouse suites which cost more. Keep track of when rooms will be available and can be scheduled. Company Manager - Create a hierarchy of classes - abstract class Employee and subclasses HourlyEmployee, SalariedEmployee, Manager, and Executive. Everyone's pay is calculated differently, research a bit about it. After you've established an employee hierarchy, create a Company class that allows you to manage the employees. You should be able to hire, fire, and raise employees. Bank Account Manager - Create a class called Account which will be an abstract class for three other classes called CheckingAccount, SavingsAccount, and BusinessAccount. Manage credits and debits from these accounts through an ATM-style program. Patient / Doctor Scheduler - Create a patient class and a doctor class. Have a doctor that can handle multiple patients and set up a scheduling program where a doctor can only handle 16 patients during an 8 hr workday. Recipe Creator and Manager - Create a recipe class with ingredients and put them in a recipe manager program that organizes them into categories like desserts, main courses, or by ingredients like chicken, beef, soups, pies, etc. Image Gallery - Create an image abstract class and then a class that inherits from it for each image type. Put them in a program that displays them in a gallery-style format for viewing. Shape Area and Perimeter Classes - Create an abstract class called Shape and then inherit from it other shapes like diamond, rectangle, circle, triangle, etc. Then have each class override the area and perimeter functionality to handle each shape type. Flower Shop Ordering To Go - Create a flower shop application that deals in flower objects and use those flower objects in a bouquet object which can then be sold. Keep track of the number of objects and when you may need to order more. Family Tree Creator - Create a class called Person which will have a name, when they were born, and when (and if) they died. Allow the user to create these Person classes and put them into a family tree structure. Print out the tree to the screen. Threading Create A Progress Bar for Downloads - Create a progress bar for applications that can keep track of a download in progress. The progress bar will be on a separate thread and will communicate with the main thread using delegates. Bulk Thumbnail Creator - Picture processing can take a bit of time for some transformations. Especially if the image is large. Create an image program that can take hundreds of images and converts them to a specified size in the background thread while you do other things. For added complexity, have one thread handling re-sizing, have another bulk renaming of thumbnails, etc. Web Page Scraper - Create an application that connects to a site and pulls out all links, or images, and saves them to a list. Optional: Organize the indexed content and don’t allow duplicates. Have it put the results into an easily searchable index file. Online White Board - Create an application that allows you to draw pictures, write notes and use various colors to flesh out ideas for projects. Optional: Add a feature to invite friends to collaborate on a whiteboard online. Get Atomic Time from Internet Clock - This program will get the true atomic time from an atomic time clock on the Internet. Use any one of the atomic clocks returned by a simple Google search. Fetch Current Weather - Get the current weather for a given zip/postal code. Optional: Try locating the user automatically. Scheduled Auto Login and Action - Make an application that logs into a given site on a schedule and invokes a certain action and then logs out. This can be useful for checking webmail, posting regular content, or getting info for other applications and saving it to your computer. E-Card Generator - Make a site that allows people to generate their own little e-cards and send them to other people. Do not use Flash. Use a picture library and perhaps insightful mottos or quotes. Content Management System - Create a content management system (CMS) like Joomla, Drupal, PHP Nuke, etc. Start small. Optional: Allow for the addition of modules/addons. Web Board (Forum) - Create a forum for you and your buddies to post, administer and share thoughts and ideas. CAPTCHA Maker - Ever see those images with letters numbers when you signup for a service and then ask you to enter what you see? It keeps web bots from automatically signing up and spamming. Try creating one yourself for online forms. Files Quiz Maker - Make an application that takes various questions from a file, picked randomly, and puts together a quiz for students. Each quiz can be different and then reads a key to grade the quizzes. Sort Excel/CSV File Utility - Reads a file of records, sorts them, and then writes them back to the file. Allow the user to choose various sort style and sorting based on a particular field. Create Zip File Maker - The user enters various files from different directories and the program zips them up into a zip file. Optional: Apply actual compression to the files. Start with Huffman Algorithm. PDF Generator - An application that can read in a text file, HTML file, or some other file and generates a PDF file out of it. Great for a web-based service where the user uploads the file and the program returns a PDF of the file. Optional: Deploy on GAE or Heroku if possible. Mp3 Tagger - Modify and add ID3v1 tags to MP3 files. See if you can also add in the album art into the MP3 file’s header as well as other ID3v2 tags. Code Snippet Manager - Another utility program that allows coders to put in functions, classes, or other tidbits to save for use later. Organized by the type of snippet or language the coder can quickly lookup code. Optional: For extra practice try adding syntax highlighting based on the language. Databases SQL Query Analyzer - A utility application in which a user can enter a query and have it run against a local database and look for ways to make it more efficient. Remote SQL Tool - A utility that can execute queries on remote servers from your local computer across the Internet. It should take in a remote host, user name, and password, run the query and return the results. Report Generator - Create a utility that generates a report based on some tables in a database. Generates sales reports based on the order/order details tables or sums up the day's current database activity. Event Scheduler and Calendar - Make an application that allows the user to enter a date and time of an event, event notes, and then schedule those events on a calendar. The user can then browse the calendar or search the calendar for specific events. Optional: Allow the application to create re-occurrence events that reoccur every day, week, month, year, etc. Budget Tracker - Write an application that keeps track of a household’s budget. The user can add expenses, income, and recurring costs to find out how much they are saving or losing over a period of time. Optional: Allow the user to specify a date range and see the net flow of money in and out of the house budget for that time period. TV Show Tracker - Got a favorite show you don’t want to miss? Don’t have a PVR or want to be able to find the show to then PVR it later? Make an application that can search various online TV Guide sites, locate the shows/times/channels and add them to a database application. The database/website then can send you email reminders that a show is about to start and which channel it will be on. Travel Planner System - Make a system that allows users to put together their own little travel itinerary and keep track of the airline/hotel arrangements, points of interest, budget, and schedule. Graphics and Multimedia Slide Show - Make an application that shows various pictures in a slide show format. Optional: Try adding various effects like fade in/out, star wipe, and window blinds transitions. Stream Video from Online - Try to create your own online streaming video player. Mp3 Player - A simple program for playing your favorite music files. Add features you think are missing from your favorite music player. Watermarking Application - Have some pictures you want copyright protected? Add your own logo or text lightly across the background so that no one can simply steal your graphics off your site. Make a program that will add this watermark to the picture. Optional: Use threading to process multiple images simultaneously. Turtle Graphics - This is a common project where you create a floor of 20 x 20 squares. Using various commands you tell a turtle to draw a line on the floor. You have moved forward, left or right, lift or drop the pen, etc. Do a search online for "Turtle Graphics" for more information. Optional: Allow the program to read in the list of commands from a file. GIF Creator A program that puts together multiple images (PNGs, JPGs, TIFFs) to make a smooth GIF that can be exported. Optional: Make the program convert small video files to GIFs as well. Security Caesar cipher - Implement a Caesar cipher, both encoding, and decoding. The key is an integer from 1 to 25. This cipher rotates the letters of the alphabet (A to Z). The encoding replaces each letter with the 1st to 25th next letter in the alphabet (wrapping Z to A). So key 2 encrypts "HI" to "JK", but key 20 encrypts "HI" to "BC". This simple "monoalphabetic substitution cipher" provides almost no security, because an attacker who has the encoded message can either use frequency analysis to guess the key, or just try all 25 keys.

Electrumx Atomicals Indexer Server

HTTP App. Server and JSON DB - Shared Parallel (Atomic) & Distributed

A Model Context Protocol (MCP) server that implements the Zettelkasten knowledge management methodology, allowing you to create, link, explore and synthesize atomic notes through Claude and other MCP-compatible clients.

ToroDB Server is an open source NoSQL database that runs on top of a RDBMS. Compatible with MongoDB protocol and APIs, but with support for native SQL, atomic operations and reliable and durable backends like PostgreSQL

MCP server for Atomic Red Team

Secure remote MCP server for Obsidian vaults -- access your notes from Claude, your phone, or any MCP client, anywhere. OAuth 2.0 auth, Cloudflare Tunnel, atomic writes safe for Obsidian Sync.

This repo is no longer used! Code is moved to Atomic-Server

Atom of Thoughts (AoT) MCP is a server that decomposes complex problems into independent atomic units of thought, using the dependencies between these units to deliver more robust reasoning and validated insights.

EleX Proxy is a lightweight Rust implementation designed to proxy communication with the Atomicals ElectrumX server.

Viact is a starter template for React TypeScript that uses Vitejs, which supports RTL for specific styles, proxy fetching API (to fix CORS errors) and a simple mock REST API server. Additionally, Is set up VScode, Storybook, ErrorBoundary, UnoCss (atomic CSS engine), Eslint, Prettier, and more.

MCP server for AI agents to analyze Excel spreadsheets through atomic operations. Like SQL for Excel. Fast, accurate, and efficient. No context overflow.

MCP server for structured AI reasoning — decompose problems into atomic thoughts with dependency graphs, confidence tracking, and interactive D3.js visualization

quaere provides a set of declarative and atomic state management solutions to help you manage server state efficiently.

Orce is a lightweight multiplayer online game server framework. Using a lock-free programming techniques, such as: atomic, spinlock, concurrent container, no-block queue, scalable memory allocator to achieve the high performance of the engine. The Orce using protobuf as a communication protocol can achieve the connection of a variety of clients, including iOS, android, flash, html5, unity3d.

A Serverless function for updating Algolia indexes

A server for Next Atomic GQL based on Parse Server with defined schema feature

A persistent memory MCP server for AI coding agents — stores, searches, and retrieves atomic learnings so agents retain knowledge across sessions.

Atomic Time Synch is a Python application that allows you to synchronize your system time with an atomic time source using the Network Time Protocol (NTP). It provides both manual and automatic time synchronization options and allows you to choose from different NTP servers.

A home brew stratum-0 cesium atomic mantel clock and NTP server.

Calendar MCP server with atomic booking, conflict prevention, deterministic RRULE expansion, and TOON token compression for AI agents

Transactional File System server for Model Context Protocol (MCP). Enterprise-grade tools for AI agents: atomic edits, undo/redo, code navigation, refactoring, git integration. Docker ready.

This project sets up an Active Directory environment and configures Splunk to ingest events from a Windows Server and a target machine. We perform a brute force attack using Kali Linux to observe telemetry and use Atomic Red Team for additional testing. Goals: enhance IT administration skills, event monitoring, and threat detection.

Google File System in Python. This uses TCP to communicate between master, chunkserver, and client. Based off of the eponymous paper and mostly true to it. It doesn't do any of the slow start or nearest rack tweaks mentioned. the metadata is written atomically on updates, but everything is written every time. also no checksumming is done of the metadata so it is certainly not fault tolerant in that sense. but does provide a basic block oriented server. See gfs.py for unit tests.

Next.JS-14, Ant-design, Typescript, Server Side Multi-Language, Docker File, Styled Component with SSR config, Codegen, Atomic Design Pattern, Theme, BreakPoint for Mobile and Desktop, All Colors, Font, Utils, Proxy Server, Storybook, Cypress, Eslint, Husky, Prettier

Welcome to Hyper Bot ! Create your own permanent Hyper Bot ( runs on Heroku, no Lc0 ) If you want to create your own permanent bot, do the following: Sign up to GitHub https://github.com/join , if you have not already. With your GitHub account visit https://github.com/hyperchessbot/hyperbot , then click on Fork. Create a BOT account if you do not already have one. To create one use an account that has not played any games yet, log into this account, then visit https://hypereasy.herokuapp.com/auth/lichess/bot , approve oauth and then on the page you are taken to click on 'Request upgrade to bot'. Create an API access token with your BOT account at https://lichess.org/account/oauth/token ( should have scopes Read incoming challenges / Create, accept, decline challenges / Play games with the bot API ) Sign up to Heroku https://signup.heroku.com/ , if you have not already. At Heroku create a new app using New / Create new app. Choose Europe for region. In the app's dashboard go to the Deploy tab. Use the GitHub button to connect the app to your forked repo. Press Search to find your repositories, then select hyperbot. You need to deploy the master branch. Enable Automatic Deploys and press Deploy Branch, for the initial deploy. Wait for the build to finish. In Heroku Settings / Reveal Config Vars create a new variable TOKEN and set its value to your newly created access token, then create a new variable BOT_NAME and set its value to your bot's lichess username. For more detailed instructions and screenshots on setting up your Heroku app refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Creating-and-configuring-your-app-on-Heroku#creating-and-configuring-your-app-on-heroku . Congratulations, you have an up and running lichess bot. If you want to use 3-4-5 piece tablebases on Heroku, refer to this guide https://github.com/hyperchessbot/hyperbot/wiki/Update-Heroku-app-to-latest-version-using-Gitpod#enabling-syzygy-tablebases . Upgrade to bot and play games in your browser To upgrade an account, that has played no games yet, to bot, and to make this bot accept challenges and play games in your browser, visit https://hypereasy.herokuapp.com . For detailed instructions see https://lichess.org/forum/off-topic-discussion/hyper-easy-all-variants-lichess-bot-running-in-your-browser#1 . Update Heroku app to latest version using Gitpod Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Update-Heroku-app-to-latest-version-using-Gitpod#update-heroku-app-to-latest-version-using-gitpod . Creating a MongoDb account Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Creating-a-MongoDb-account#creating-a-mongodb-account . Build external multi game PGN file with MongoDb book builder ( version 2 ) Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Build-book-from-external-multi-game-PGN-file#build-book-from-external-multi-game-pgn-file . Install bot on Windows ( runs Lc0 ) Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Install-bot-on-Windows-(-runs-Lc0-)#install-bot-on-windows--runs-lc0- . Install bot on goorm.io ( runs Lc0 ) Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Install-bot-on-goorm.io-(-runs-Lc0-)#install-bot-on-goormio--runs-lc0- . Download a net for Lc0 Dowload a net from https://lczero.org/dev/wiki/best-nets-for-lc0 . Rename the weights file 'weights.pb.gz', then copy it to the 'lc0goorm' folder. Overwrite the old file. Update to latest version on Windows / goorm Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Update-to-latest-version-on-Windows-or-goorm#update-to-latest-version-on-windows--goorm . Explanation of files Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Explanation-of-files#git . Contribute to code Refer to this Wiki https://github.com/hyperchessbot/hyperbot/wiki/Contribute-to-code#contribute-to-code . Discussion / Feedback Discuss Hyper Bot on Discord https://discord.gg/8m3Muay . Post issues on GitHub https://github.com/hyperchessbot/hyperbot/issues . Getting assistance in lichess PM You can seek assistance in lichess PM using your BOT account. Open an issue at https://github.com/hyperchessbot/hyperbot/issues with the GitHub account on which your forked Hyper Bot, with the title 'Identifying lichess account'. Give a link to your lichess account in the issue. After identification you can PM https://lichess.org/@/hyperchessbotauthor . Seeking assistance in lichess PM without verifying your lichess account with your GitHub account may get you blocked. The block may be lifted once you identify your lichess account with your GitHub account. Config vars KEEP_ALIVE_URL : set this to the full link of your bot home page ( https://[yourappname].herokuapp.com , where change [yourappname] to your Heroku app name ) if you want your bot to be kept alive from early morning till late night Heroku server time, keeping alive a free Heroku bot for 24/7 is not possible, because a free Heroku account has a monthly quota of 550 hours ALWAYS_ON : requires paid Heroku account, set it to 'true' to keep the bot alive 24/7, you have to set KEEP_ALIVE_URL to your bot's full home page link for ALWAYS_ON to work ( see also the explanation of KEEP_ALIVE_URL config var ) ALLOW_CORRESPONDENCE : set it to 'true' to allow playing correspondence and infinite time control games CORRESPONDENCE_THINKING_TIME : think in correspondence as if the bot had that many seconds left on its clock ( default : 120 ), the actual thinking time will be decided by the engine MONGODB_URI : connect URI of your MongoDb admin user ( only the host, no slash after the host, do database specified, no query string ), if defined, your latest games or games downloaded from an url ( version 2 only ) will be added to the database on every startup, by default this config var is not defined USE_MONGO_BOOK : set it to 'true' to use the MongoDb book specified by MONGODB_URI DISABLE_ENGINE_FOR_MONGO : set it to 'true' to disable using engine completely when a MongoDb book move is available ( by default the bot may ignore a MongoDb book move at its discretion and use the engine instead for better performance and to allow for more varied play ) MONGO_VERSION : MongoDb book builder version, possible values are 1 ( default, builds a book from bot games as downloaded from lichess as JSON ), 2 ( builds a book from bot games as downloaded from lichess as PGN, or from an arbitrary url specified in PGN_URL ) PGN_URL : url for downloading a multi game PGN file for MongoDb book builder ( version 2 only ) MAX_GAMES : maximum number of games to be built by MongoDb book builder GENERAL_TIMEOUT : timeout for event streams in seconds ( default : 15 ) ENGINE_THREADS : engine Threads uci option ( default : 1 ) ENGINE_HASH : engine Hash uci option in megabytes ( default : 16 ) ENGINE_CONTEMPT : engine Contempt uci option in centipawns ( default : 24 ) ENGINE_MOVE_OVERHEAD : engine Move Overhead uci option in milliseconds ( default : 500 ) ALLOW_PONDER : set it to 'true' to make the bot think on opponent time BOOK_DEPTH : up to how many plies into the game should the bot use the book, choosing too high book depth is running the risk of playing unsound moves ( default : 20 ) BOOK_SPREAD : select the move from that many of the top book moves, choosing to high book spread is running the risk of playing unsound moves ( default : 4 ) BOOK_RATINGS : comma separated list of allowed book rating brackets, possible ratings are 1600, 1800, 2000, 2200, 2500 ( default : '2200,2500') BOOK_SPEEDS : comma separated list of allowed book speeds, possible speeds are bullet, blitz, rapid, classical ( default : 'blitz,rapid' ) LOG_API : set it to 'true' to allow more verbose logging, logs are available in the Inspection / Console of the browser USE_SCALACHESS : set it to 'true' to use scalachess library and multi variant engine ACCEPT_VARIANTS : space separated list of variant keys to accept ( default : 'standard' ), for non standard variants USE_SCALACHESS has to be set to 'true' , example : 'standard crazyhouse chess960 kingOfTheHill threeCheck antichess atomic horde racingKings fromPosition' ACCEPT_SPEEDS : space separated list of speeds to accept ( default : 'bullet blitz rapid classical' ), to allow correspondence set ALLOW_CORRESPONDENCE to 'true' DISABLE_RATED : set it to 'true' to reject rated challenges DISABLE_CASUAL : set it to 'true' to reject casual challenges DISABLE_BOT : set it to 'true' to reject bot challenges DISABLE_HUMAN : set it to 'true' to reject human challenges GAME_START_DELAY : delay between accepting challenge and starting to play game in seconds ( default : 2 ) CHALLENGE_INTERVAL : delay between auto challenge attempts in minutes ( default : 30 ) CHALLENGE_TIMEOUT : start attempting auto challenges after being idle for that many minutes ( default : 60 ) USE_NNUE : space separated list of variant keys for which to use NNUE ( default: 'standard chess960 fromPosition' ) USE_LC0 : set it to 'true' to use Lc0 engine, only works with Windows and goorm installation, on Heroku and Gitpod you should not use it or set it to false USE_POLYGLOT : set it to 'true' to use polyglot opening book WELCOME_MESSAGE : game chat welcome message ( delay from game start : 2 seconds , default : 'coded by @hyperchessbotauthor' ) GOOD_LUCK_MESSAGE : game chat good luck message ( delay from game start : 4 seconds , default : 'Good luck !' ) GOOD_GAME_MESSAGE : game chat good game message ( delay from game end : 2 seconds , default : 'Good game !' ) DISABLE_SYZYGY : set it to 'true' to disable using syzygy tablebases, note that syzygy tablebases are always disabled when USE_LC0 is set to 'true', syzygy tablebases are only installed for deployment on Heroku APP_NAME : Heroku app name ( necessary for interactive viewing of MongoDb book ) ABORT_AFTER : abort game after that many seconds if the opponent fails to make their opening move ( default : 120 ) DECLINE_HARD : set it to 'true' to explicitly decline unwanted challenges ( by default they are only ignored and can be accepted manually )

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