https://lichess.org/@/HollowLeaf/blogHollowLeaf's Blog2026-07-17T15:21:10.514Zhttps://lichess.org/@/HollowLeaf/blog/chessboard-magic-16-release/wOFJ7rld2026-07-17T15:21:10.514Z2026-07-17T15:21:10.514ZChessboard Magic 1.6 Release<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=HN0uZ6wCf4zk.webp&w=880&sig=fc7060a26f07c0e8688806515610a41a0f4f2db1" /><br />59 Chess ApplicationsHollowLeafhttps://lichess.org/@/HollowLeaf/blog/30-open-source-chess-applications/QPkJlnNx2026-06-21T00:49:03.906Z2026-06-21T00:49:03.906Z30 Open Source Chess Applications<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=SZ2PH5LnIqqQ.webp&w=880&sig=e0b180573f691f327bfaf1af5b2a007aa4090645" /><br />A collection of games, trainers, tools, and experiments from Chessboard Magic, released under the MIT license for anyone who wants to build chess software.HollowLeafhttps://lichess.org/@/HollowLeaf/blog/2-years-of-programming-chess-apps-my-lessons/PoajTjaa2026-05-28T10:24:55.791Z2026-05-28T10:24:55.791Z2 Years of Programming Chess Apps: My Lessons<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=W0bp_FOzsXR0.webp&w=880&sig=51cbdbf6aa5a0cfbadca7c0900cbd8c6dd6b267a" /><br />“A journey of a thousand miles begins with a single step.” - Lao Tzu from the Tao Te ChingHollowLeafhttps://lichess.org/@/HollowLeaf/blog/notation-trainer/QWSlH3s72026-04-07T14:38:07.434Z2026-04-07T14:38:07.434ZNotation Trainer<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=Npb61-YaxoqB.webp&w=880&sig=400c457605c762b30de4aaf5bc575f8009c8660f" /><br />Practising Chess NotationHollowLeafhttps://lichess.org/@/HollowLeaf/blog/fischer-random-trainer/wnaAfPDg2026-03-22T17:05:27.5Z2026-03-22T17:05:27.5ZFischer Random Trainer<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=yKX1Z0XbXj8K.webp&w=880&sig=61ec3ae492bee17ca504f32420a28a866d77c669" /><br />Train your calculation. Let the engine guide your intuitionHollowLeafhttps://lichess.org/@/HollowLeaf/blog/new-tool-maia-analysis/bgVyiTuN2026-03-11T10:45:18.36Z2026-03-11T10:45:18.36ZNew Tool: Maia Analysis<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=4Q2zlxmfZ1B_.webp&w=880&sig=f97e05e65d37b80e5f88dddfd8be55b558077b98" /><br />Exploring Human ChessHollowLeafhttps://lichess.org/@/HollowLeaf/blog/new-tool-chessdb-explorer/kanf84Uo2026-02-26T12:54:19.924Z2026-02-26T12:54:19.924ZNew Tool: ChessDB Explorer<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=Zlh63zQxjpcE.webp&w=880&sig=28997c9a0b47d9b8cb114b9d784df91af83cda5a" /><br />Exploring positions with ChessDBHollowLeafhttps://lichess.org/@/HollowLeaf/blog/chessboard-magic-15-release/uzZIeKaP2026-02-11T13:59:50.414Z2026-02-11T13:59:50.414ZChessboard Magic 1.5 Release<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=E23dzWabT_35.webp&w=880&sig=3d115c77cabdf1fb0265ab8168d65f72aa1dc884" /><br />57 Free Chess ApplicationsHollowLeafhttps://lichess.org/@/HollowLeaf/blog/opponent-prep-updated/uk1kdQWg2026-02-02T12:16:03.451Z2026-02-02T12:16:03.451ZOpponent Prep (Updated)<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=AzfQ2xLMMn9w.webp&w=880&sig=a57617ad1d162eb48fe3c85605471f0ef669dc7e" /><br />Preparing for your next opponent using trends, openings, and real game data.HollowLeafhttps://lichess.org/@/HollowLeaf/blog/in-search-of-brilliancies-in-chess/YXvlaw8x2026-01-25T17:28:25.727Z2026-01-25T17:28:25.727ZIn Search of Brilliancies in Chess<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=CwVrh08S9_QW.webp&w=880&sig=1369b10c6655ecd365f53989eae9adc5ca450379" /><br />!!HollowLeafhttps://lichess.org/@/HollowLeaf/blog/suspicious-chess-app-idea/AeSxrUMA2026-01-15T12:50:47.204Z2026-01-15T12:50:47.204ZSuspicious Chess App Idea?<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=26m86C1UWJOZ.webp&w=880&sig=45ea019eb85a2bb4ddbf9eef983acd863f6bf0ef" /><br />Suspicious Games, Engines, and ParanoiaHollowLeafhttps://lichess.org/@/HollowLeaf/blog/ai-chess-coaches/iE4R5tPl2026-01-06T15:38:43.68Z2026-01-06T15:38:43.68ZAI Chess Coaches?<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=LeMAe_WCZ5l0.webp&w=880&sig=11cb50a89e1b05f38c3f101959cd1b28acaa78b1" /><br />Is It Possible?HollowLeafhttps://lichess.org/@/HollowLeaf/blog/repertoire-builder-14-jan-2026-release/QUMETcfi2026-01-02T15:26:37.436Z2026-01-02T15:26:37.436ZRepertoire Builder 1.4 (Jan 2026 Release)<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=VwIV_pPYNdRX.webp&w=880&sig=7e13f613e3b9a6cb20314f4f694992dcc48e29ff" /><br />The Chessboard Magic Repertoire Builder is now officially eight months oldHollowLeafhttps://lichess.org/@/HollowLeaf/blog/opening-inaccuracies-tool/MePEn39I2025-12-21T07:39:10.199Z2025-12-21T07:39:10.199ZOpening Inaccuracies Tool<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=qHg7jWbyIgOI.webp&w=880&sig=b5ab611f7c851a376f6c05011abb1ebfa124dc01" /><br />Insanity is doing the same thing over and over again and expecting different resultsHollowLeafhttps://lichess.org/@/HollowLeaf/blog/using-maia-and-leela-chess-zero-to-find-repertoire-gaps/VC2JsrqO2025-12-12T17:19:30.045Z2025-12-12T17:19:30.045ZUsing Maia and Leela Chess Zero to Find Repertoire Gaps<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=u1typVhYOfvC.webp&w=880&sig=5bbdac88375d1874a7a898d6ab2206a94ff8bb54" /><br />A novel idea for chess developersHollowLeafhttps://lichess.org/@/HollowLeaf/blog/integrating-maia2-the-human-like-chess-engine-into-my-chess-application/zi3EhDn52025-12-07T14:32:07.187Z2025-12-07T14:32:07.187ZIntegrating Maia2 (The Human-Like Chess Engine) into My Chess Application<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=kzoH5pfX79b7.webp&w=880&sig=ac45f72797c9695ee56544f6a442bc0fc9007232" /><br />A beginner-friendly look at human-style AI, neural networks, ONNX models, opening books, and everything that went into making Maia playable inside the platform.HollowLeafhttps://lichess.org/@/HollowLeaf/blog/free-repertoire-builder-v13-november-release/FCzPDmD92025-11-28T16:22:23.679Z2025-11-28T16:22:23.679ZFree Repertoire Builder v1.3 November Release<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:FCzPDmD9:wqjnnT9X.webp&w=880&sig=7f85f612dc062d78cd362f7a6b476589ab6fa512" /><br />The journey of a thousand miles begins with a single step - Lao TzuHollowLeafhttps://lichess.org/@/HollowLeaf/blog/chessboard-magic-12-halloween-release/6hqTx1WP2025-10-25T20:11:01.529Z2025-10-25T20:11:01.529ZChessboard Magic 1.2. Halloween Release<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:6hqTx1WP:oKc88Mjl.webp&w=880&sig=bde44c9f6a524b2fad794d1b22c37bb25bce88fb" /><br />Platform Updates, Fresh Apps, and What’s NextHollowLeafhttps://lichess.org/@/HollowLeaf/blog/open-sourced-k-maps/CH4KqiEE2025-10-23T00:34:11.096Z2025-10-23T00:34:11.096ZOpen-Sourced K-MAPS<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:CH4KqiEE:UGlHbsUc.webp&w=880&sig=d854577c9af89b3647f791d59987b3983263ec31" /><br />A lightweight JavaScript library for visualizing King Safety, Material, Activity, Pawn Structure, and SpaceHollowLeafhttps://lichess.org/@/HollowLeaf/blog/open-source-chess-pieces-for-everyone/pFTzoFw42025-09-26T09:20:44.221Z2025-09-26T09:20:44.221ZOpen-Source Chess Pieces for Everyone<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:pFTzoFw4:DuvmN0kK.webp&w=880&sig=363cc9ac0a6d49e25519f144ccb10c85213f022e" /><br />Free, open-source chess piece icons for developers and creatorsHollowLeafhttps://lichess.org/@/HollowLeaf/blog/building-chess-solitaire/9tI1wxHQ2025-09-22T18:28:29.065Z2025-09-22T18:28:29.065ZBuilding Chess Solitaire<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:9tI1wxHQ:x3I4pxoX.webp&w=880&sig=b813ef5239348b377a1f7deab891dd29d66082d6" /><br />Exploring the design, analysis, and results behind my latest chess applicationHollowLeafhttps://lichess.org/@/HollowLeaf/blog/new-free-game-review-tool/CpNxCImq2025-09-17T20:49:30.279Z2025-09-17T20:49:30.279ZNew Free Game Review Tool<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:CpNxCImq:SH4vxLO0.webp&w=880&sig=fc810dac47b036f0a3272c367830b38c76a94e20" /><br />Because Why Not?HollowLeafhttps://lichess.org/@/HollowLeaf/blog/repertoire-builder-v11-is-live-chessboard-magic-updates/CHbnIfbi2025-08-26T11:13:32.749Z2025-08-26T11:13:32.749ZRepertoire Builder v1.1 is Live + Chessboard Magic Updates<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:CHbnIfbi:3k3RdUPB.webp&w=880&sig=c7eea0cb1c93c4e98140c58978f8500bf498aeab" /><br />"Play the opening like a book, the middle game like a magician, and the endgame like a machine." — Rudolph SpielmannHollowLeafhttps://lichess.org/@/HollowLeaf/blog/repertoire-builder-v10/wZUTjfXG2025-07-20T13:13:04.227Z2025-07-20T13:13:04.227ZRepertoire Builder v1.0<img class="ublog-post-image" width="880" height="550" src="https://image.lichess1.org/display?fmt=webp&h=550&op=thumbnail&path=ublog:wZUTjfXG:PydawHfX.webp&w=880&sig=afb4c73fa3f5358b3e51f99241688f78e79c208f" /><br />Built by a Chess Addict, for Chess AddictsHollowLeaf