OpeningMatrix Part of ChessTropic
Unlimited Join Discord
Sign in Create ChessTropic account

Indian defenses

Nimzo-Indian Defense

Learn the ideas, practise the moves without help, then time trial. 11 lines ready on the board.

Unlimited 11 lines Learn Practice Time trial

Sign in to continue Create account

Starting moves

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4

Lines in this course

  • Classical 4.Qc2
  • Rubinstein 4.e3
  • Sämisch 4.a3
  • 4.f3
  • 4.Nf3
  • 4.Qc2 O-O 5.a3
  • 4.a3 Bxc3+ 5.bxc3 c5
  • 4.f3 c5
  • 4.Bg5
  • 4.Qc2 c5
  • 4.e3 b6

Ideas from the course

  • Nimzo-Indian. Black pins Nc3 and fights for e4 without ...d5 yet.
  • Classical. White wants the bishop pair without doubled pawns.
  • Rubinstein. Simple development. The pawn structure stays flexible.

Continue on the board

Sign in or create an account to train this opening. Guests can try the Fried Liver free.

Sign in to continue Create account

Release notes

What's new

Shipping history for ChessTropic, newest first. Open this anytime from the rail.

  1. v1.3 Latest

    Sparring bots, Puzzle Rush, and Coach Credits — train against style, then race the clock.

    • added Sparring: Free training games against styled bots for every signed-in member — no coaching lecture.
    • added Puzzle Rush: Solve against the clock — 3:00 and 3 lives — with its own all-time leaderboard.
    • added Coach Credits: Free members get a monthly allotment; Unlimited gets 100. Buy a one-time pack of 100 anytime.
    • improved Leaderboards: Daily, weekly, and all-time Practice boards now sit beside puzzle rating and Puzzle Rush.
    • improved Homepage: Clearer feature tour for Game Review, Blunder Override, Puzzles, AI Coach, and Sparring.
  2. v1.2

    AI Coach arrives, alongside Member Directory, Achievements, and a sharper ChessTropic shell.

    • added AI Coach: Play the Cyber Chameleon with live move notes, post-game debriefs, and follow-up chat.
    • added Member Directory: Browse public profiles and see who else is training.
    • added Achievements: Earn badges for practice streaks, puzzles, and milestones.
    • added Public profiles: Share a page for your practice stats, puzzle rating, and badges.
    • improved OpeningMatrix handoff: Opening trainer, Endgames Vault, Repertoire, and Community Courses open on OpeningMatrix when you need study tools.
    • fixed Safari: Board and shell layout fixes for Safari on macOS and iOS.
  3. v1.1

    Report, Blunder Override, and Game Review — tools that help you understand your own play.

    • added Report: Track your Chess.com and Lichess ratings, and see which openings you play most.
    • added Blunder Override: Replay past games and walk through the exact moments you threw away a win.
    • added Game Review: Import games from Chess.com, Lichess, or a PGN for a move-by-move engine breakdown.
  4. v1.0

    The first build: opening trainer, Endgames Vault, progress tracking, repertoire builder, community courses, and live puzzles.

    • added Opening Trainer: Drill 100+ official starter courses with Learn, Practice, and Time Trial.
    • added Endgames Vault: King opposition, Lucena, Philidor, king and rook mate, and king and queen mate.
    • added Progress tracking: Personal learning progress, puzzle ratings, and daily practice streaks.
    • added Repertoire Builder: Build and drill your own opening courses as White or Black.
    • added Community Courses: Publish a course to share with other players.
    • added Live Puzzles: An all-time rating leaderboard that updates as you solve.

Navigate