Learn chess openings through structured lessons and custom group creation. Access a database to search or build personalized learning sets. Use spaced repetition to review openings based on memory retention or practice at your own pace.
by Up Quark Labs, LLC★ 4.339 ratingsEducationFreeData updated 2026-09-06
With or multiple-choice quizzes featuring native audio. Track progress using spaced repetition. Review nearly 1000 in small sets that increase in difficulty. Browse or search all .
Learn strategies for the Defense variations including Dragon, Najdorf, Scheveningen, and Richter Attack. Study 200 examples and 630 exercises. Analyze theory and playing hooks in critical positions. Track progress with interactive exercises.
Practice chess tactics with over 2500 exercises focused on mating in 3 or 4 moves. Solve puzzles requiring strategic thinking and precise calculation. Track progress and refine attacking patterns for practical game improvement.
Build with interactive and practice language skills through spaced repetition. Create custom decks, set learning goals, and track progress over time. Share cards with others and review content on multiple devices.
Manage your account, register for classes, parties, and events. Receive notifications about class changes, closings, registration openings, and announcements. View event details and confirm attendance.
Learn with structured lessons, grammar explanations, and vocabulary practice. Complete interactive exercises, track progress, and review material with personalized flashcards. Earn points and level up as you advance.
Learn strategies through 950 classic and 900 exercises. Analyze positions with unique 5x5 hints. Practice tactical maneuvers and improve understanding through structured lessons.
Learn with 240 teaching examples and 340 exercises categorized by 30 tactical methods. Practice by solving problems and reviewing solutions. Track progress through structured lessons and level-based content.
Learn through short, daily lessons that focus on vocabulary building and grammar. Practice speaking and listening with interactive exercises. Track progress with monthly word goals and spaced repetition for better retention.
Learn languages with customizable vocabulary and grammar exercises. Import EPUB, PDF, and web pages to a library. Read and translate text offline. Sync audiobooks for simultaneous listening and reading. Take tests to assess progress.
Learn new English through visual images and clear definitions. Use spaced repetition to reinforce memory. Practice vocabulary with daily exercises and quizzes. Track progress over time and review for retention.
Memorize verses using flashcards with spaced repetition. Play games. Listen to audio verses. Share progress with others. Track learning progress with built-in tools.
Learn through short, daily lessons lasting 10 minutes. Practice speaking, listening, and writing with interactive exercises. Expand vocabulary with over 500 new words monthly using spaced repetition techniques.
Manage your account, register for classes and private lessons, and sign up for special events. Receive notifications about class changes, closings, registration openings, and upcoming events.
Learn through audio-based courses in subjects like statistics, probability, and computer science. Practice with flashcards and quizzes. Use spaced repetition and interleaving to improve retention. Track progress and review material for better recall.
Create custom flashcards using AI from notes, documents, or images. Study with spaced repetition scheduling. Track progress with detailed analytics. Export flashcards in multiple formats. Share study sets with others.
Manage account details, register for classes, parties, and events. Receive notifications about class changes, closings, registration openings, and announcements. View event schedules and access resources remotely.
Access video lessons, multiple choice quizzes, and daily spaced repetition quizzes for 5 days. Subscribe for unlimited content. Learn through visual mnemonics and interactive quizzes to improve memory retention.
Study games played by the World with commentary. Analyze 225 exercises to practice tactics and strategies. Play against style and review game variations. Track progress through structured lessons and level-based content.