Chess opening training
Chess opening trainer for positions that stick
Practice the decisions behind your repertoire—not just a list of moves. Blundr brings opening positions back at the right time and helps you keep playing when the game leaves the file.
Practice real opening decisions
Work through recognizable positions from a structured opening repertoire. The aim is useful recall: see the position, choose a plan, and learn from the move that needs another rep.
Build a repertoire you understand
Explore openings for White and defenses for Black, then follow related branches as your understanding grows. Blundr keeps the training path connected to the opening family.
Review what you miss
Your practice should respond to your mistakes. Revisit the positions that need attention instead of spending every session on moves you already know.
Start free
Blundr is designed to make a short daily practice useful. Begin without committing to a large course or a giant memorization project.
Turn understanding into recall
Blundr brings the positions you miss back into practice so you can build an opening repertoire that survives real games.
Try Blundr free