Chess Openings vs OpeningBook

LEARN CHESS OPENINGS BY PLAYING THEM Most apps make you watch. Prologue makes you play. You learn every opening by making the moves yourself — the only way they actually stick when you sit down for a real game. No more freezing on move 3. Build a repertoire you can trust. THREE STAGES TO REAL MASTERY • Guided — follow the correct moves and learn the plan • Hinted — play with a gentle nudge when you hesitate • From memory — recall the whole line on your own An opening isn't "learned" until you can play it blind. 300+ OPENINGS, ALL VERIFIED • Every line checked against real chess databases • Tagged by real popularity across 8.2M games • Learn what people actually play — not obscure theory BUILD YOUR OWN REPERTOIRE • White attacks and Black defenses, side by side • Pick your gambits, your defenses, your style • Everything in one place, ready for your next game REMEMBER IT FOR GOOD • Spaced-repetition review brings lines back at the right time • Daily training keeps your repertoire sharp • Turn "I studied it once" into "I know it cold" DESIGNED TO BE CALM • Elegant, minimal, distraction-free • Made for adult club players (600–1600) who want a real plan • Learn at your pace, one move at a time START FREE The entire Italian Game family is free, forever. Try the full method, then unlock all 300+ openings. PROLOGUE PREMIUM • 7-day free trial • Then €39.99/year or €9.99/month • Unlocks every opening, full repertoire tools, and spaced-repetition review Payment is charged to your Apple ID. Subscriptions renew automatically unless canceled at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Stop watching. Start playing. Build the opening repertoire you've always wanted. Privacy Policy: https://prologuechess.com/en/privacy/ Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

OpeningBook is a clean, offline reference and trainer for chess openings. BROWSE EVERYTHING • Thousands of named openings and variations, organized by ECO volume (A–E), family, and line — sourced from the open Lichess openings database. • Step through any line move-by-move on a real, playable board. • Read key ideas and classic traps for the major openings. SEARCH & FILTER • Find any opening by name, ECO code, or move sequence. • Filter by line length with a simple move-count slider. TRAIN YOUR REPERTOIRE • Add lines to your training set as White or Black. • Drill them in a play-your-side-vs-app loop. • Spaced repetition brings each line back for review at the right time. 100% offline. No account, no ads, no tracking.