6 min readWeb Development

ChessPecker: Implementing the Woodpecker Method Digitally

The story behind building a chess tactics trainer that uses spaced repetition and the Lichess API to help players improve pattern recognition.

The Woodpecker Method

The Woodpecker Method is a chess training technique popularized by chess coaches like Axel Smith and Hans Tikkanen. Unlike traditional tactics training where you constantly solve new puzzles, the Woodpecker Method involves solving the same set of puzzles multiple times. The goal is to build pattern recognition through repetition—similar to how a woodpecker repeatedly pecks at the same spot.

The theory is simple but powerful: when you see the same tactical patterns repeatedly, they become automatic. You stop calculating from scratch and start recognizing familiar patterns instantly, which is crucial for practical play where you're under time pressure.

Why Build ChessPecker?

Most popular chess platforms like Chess.com and Lichess offer excellent tactics trainers, but they focus on showing you new puzzles constantly. There wasn't a good digital implementation of the Woodpecker Method that tracked your progress across multiple rounds of the same puzzle set.

I wanted to create a tool that would make it easy to practice this method without manually tracking which puzzles you've seen, how long they took, and how your performance improves across rounds. Plus, I wanted to leverage Lichess's excellent puzzle database rather than curating puzzles myself.

Building the Solution

I chose Next.js for the frontend because it offers great performance with server-side rendering, which is important for SEO and initial load times. The Lichess API provides access to thousands of high-quality puzzles with ratings and themes, which was perfect for creating curated puzzle sets.

Supabase handles authentication and database storage, making it easy to track user progress across multiple rounds. The application stores timing data, accuracy, and which puzzles users have completed, allowing them to see their improvement over time with detailed statistics and visualizations.

One interesting technical challenge was efficiently fetching and caching puzzle data from the Lichess API while keeping the user experience smooth. I implemented a prefetching strategy that loads the next few puzzles in the background so users never have to wait between puzzles.

Key Features

  • Multi-round puzzle sets with progress tracking
  • Integration with Lichess puzzle database
  • Detailed statistics showing improvement across rounds
  • User authentication and personal puzzle history
  • Timing data to track solving speed improvements
  • Pattern recognition focus through repetition

Lessons Learned

Building ChessPecker taught me a lot about designing user experiences for learning applications. The key insight is that progress visualization is crucial—users need to see concrete evidence that they're improving, which motivates them to continue practicing.

I also learned the importance of working with existing APIs and data sources rather than building everything from scratch. Lichess's puzzle database is excellent, and integrating with it was much better than trying to curate my own puzzle collection.

Try It Yourself

ChessPecker is live and available for anyone to use. Whether you're a beginner looking to improve your tactical vision or an experienced player wanting to sharpen your pattern recognition, the Woodpecker Method is an effective training technique.

Next.jsReactSupabaseLichess APITypeScriptChess