{"id":13572147,"url":"https://github.com/lichess-org/chess-openings","last_synced_at":"2025-05-15T15:07:11.413Z","repository":{"id":37448631,"uuid":"52518351","full_name":"lichess-org/chess-openings","owner":"lichess-org","description":"An aggregated data set of chess opening names","archived":false,"fork":false,"pushed_at":"2025-02-26T17:08:19.000Z","size":1802,"stargazers_count":405,"open_issues_count":6,"forks_count":100,"subscribers_count":15,"default_branch":"master","last_synced_at":"2025-04-08T12:01:41.528Z","etag":null,"topics":["chess","dataset","lichess"],"latest_commit_sha":null,"homepage":"","language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"cc0-1.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/lichess-org.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":"CONTRIBUTING.md","funding":null,"license":"COPYING.txt","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null},"funding":{"custom":"https://lichess.org/patron"}},"created_at":"2016-02-25T11:04:56.000Z","updated_at":"2025-04-05T03:45:06.000Z","dependencies_parsed_at":"2023-02-16T01:15:43.763Z","dependency_job_id":"72891d38-9ea0-4c20-acf1-fbb87734de45","html_url":"https://github.com/lichess-org/chess-openings","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lichess-org%2Fchess-openings","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lichess-org%2Fchess-openings/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lichess-org%2Fchess-openings/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/lichess-org%2Fchess-openings/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/lichess-org","download_url":"https://codeload.github.com/lichess-org/chess-openings/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":254364270,"owners_count":22058878,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["chess","dataset","lichess"],"created_at":"2024-08-01T14:01:14.914Z","updated_at":"2025-05-15T15:07:06.405Z","avatar_url":"https://github.com/lichess-org.png","language":"Python","funding_links":["https://lichess.org/patron"],"categories":["Python"],"sub_categories":[],"readme":"Chess opening names\n===================\n\nAn aggregated data set of chess opening names.\n\nfield | `/` | `dist/` | description\n--- | --- | --- | ---\neco | x | x | [ECO](https://en.wikipedia.org/wiki/Encyclopaedia_of_Chess_Openings) classification\nname | x | x | Opening name (English language)\npgn | x | x| Well known sequence of moves, or the most common moves to reach the opening position based on master games, as PGN\nuci | | x | Same moves as `pgn` in [UCI notation](https://backscattering.de/chess/uci/#move)\nepd | | x | [EPD](https://www.chessprogramming.org/Extended_Position_Description) (FEN without move numbers) of the opening position, en passant field only if legal\n\nTo generate `dist/`, install Python, then `pip3 install chess` and run `make`.\nOr select the latest\n[workflow run](https://github.com/lichess-org/chess-openings/actions) and\ndownload build artifacts.\n\nThis dataset is also [available in the Apache Parquet format](https://hf.co/datasets/Lichess/chess-openings).\n\nConventions\n-----------\n\n* Title case is used for opening names.\n* Names are structured like `Opening family: Variation, Subvariation, ...`,\n  e.g., `Sicilian Defense: Najdorf Variation, English Attack`.\n* The suggested way to classify games is to play moves backwards until\n  a named position is found. To make this work well with common transpositions,\n  multiple entries for a single opening may be added.\n* However, each name has a unique *shortest* line. If necessary,\n  a distinguishing move is appended, e.g.,\n  `King's Gambit Accepted: Schurig Gambit, with Bb5`.\n\nContributing\n------------\n\nOpening data is in `a.tsv`, `b.tsv`, `c.tsv`, `d.tsv`, and `e.tsv`.\n\nImprovements, additions and fixes are welcome. If you have concrete\nsuggestions, please be bold and submit the proposed changes directly as pull\nrequests!\n\nThe changes will be live on lichess.org after the next update of\n[scalachess](https://github.com/lichess-org/scalachess) (no fixed schedule)\nand the\n[opening explorer](https://github.com/lichess-org/lila-openingexplorer)\n(daily).\n\nCopyright\n---------\n\nAs a collection of facts, this data set is in the public domain.\nConsiderable effort was spent curating and cleaning the data. Insofar as that\nqualifies for copyright, the work is released under the\nCC0 Public Domain Dedication.\n\n[![CC0](https://i.creativecommons.org/p/zero/1.0/88x31.png)](https://creativecommons.org/publicdomain/zero/1.0/)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flichess-org%2Fchess-openings","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flichess-org%2Fchess-openings","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flichess-org%2Fchess-openings/lists"}