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I made a free Chess Opening Trainer (Web & Android) – 3.600+ ECO lines

A topic by biokompott created Apr 14, 2026 Views: 155

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Hi everyone, I just released Vienna Chess Rat, a free tool to help you drill openings and track your progress.

3,600+ Opening Moves: Covers the entire ECO structure.
Progress Tracking: Saves your stats for every category locally.
Modes: Choose between "Drill" for focus or "Explorer" for new lines.
Smart Suggestions: The app suggests openings where you’re still weak.

It’s completely free, runs in the browser, and stores all data locally on your device. No registration needed. Check it out here:

<a href="https://biokompott.itch.io/vienna-chess-rat" _ngcontent-ng-c2905793980="" target="_blank" rel="noopener" externallink="" _nghost-ng-c4185000988="" jslog="197247;track:generic_click,impression,attention;BardVeMetadataKey:[[" r_d9c7b59f85bb604f","c_1171830d1e46990b",null,"rc_88ac09a957b9842f",null,null,"de",null,1,null,null,1,0]]"="" class="ng-star-inserted" data-hveid="0" decode-data-ved="1" data-ved="0CAAQ_4QMahgKEwiQsKib_-yTAxUAAAAAHQAAAAAQiQE">https://biokompott.itch.io/vienna-chess-rat</a>